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S3C2440A英文官方手册:32位微控制器
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"S3C2440A是一款32位CMOS微控制器的英文官方用户手册,主要涉及产品规格、功能和设计改进等内容。三星公司对此手册中的信息准确性不承担任何责任,并有权在无通知的情况下对产品进行改进。手册不提供半导体设备的专利授权,且三星不对产品的适用性、特定用途的应用或由此产生的任何损害负责。‘典型’参数可能会有所变化。"
S3C2440A是三星公司生产的一款基于ARM920T内核的32位微控制器,广泛应用在嵌入式系统设计中。该处理器具有高性能和低功耗的特点,适用于各种嵌入式应用,如移动设备、消费电子和工业控制系统。
手册中的关键知识点包括:
1. **32-BIT CMOS 微控制器**:S3C2440A采用了CMOS(互补金属氧化物半导体)技术,这是一种在数字电路中广泛使用的工艺,能够实现高速度、低功耗的逻辑操作。32位表示其数据总线宽度,意味着它能一次处理32位数据,提供了较高的计算能力。
2. **ARM920T内核**:这是ARM公司设计的一种RISC(精简指令集计算机)架构,具备高效能和低功耗特性。ARM920T支持Thumb和ARM指令集,可以处理不同的代码优化需求。
3. **产品规格**:手册包含了S3C2440A的具体硬件规格,如CPU时钟速度、内存接口、I/O端口、外设接口等。这些规格是评估该微控制器是否适合特定应用的关键信息。
4. **设计改进与更新**:三星保留权利在任何时候对产品进行功能或设计的改进,而无需事先通知。这意味着S3C2440A可能会有新的版本或变种,可能包含性能提升或新功能。
5. **责任与法律条款**:手册明确指出,三星不对手册信息的准确性负责,也不对因使用产品或设计导致的后果承担责任。此外,购买半导体设备不包含三星或其他公司的专利授权。
6. **'典型'参数**:手册中提到的“典型”参数是指在标准条件下测得的一般性能指标,这些参数在实际应用中可能因环境和配置差异而有所不同。
7. **应用与使用责任**:用户需要自行判断S3C2440A是否适合其特定的应用场景,三星不承担由此产生的任何直接或间接损失。
S3C2440A用户手册是开发者和工程师了解并利用该微控制器进行系统设计的重要参考资料,它提供了详细的技术规格、使用指南以及法律免责声明。通过深入学习和理解手册内容,设计者能够有效地利用S3C2440A构建高效的嵌入式系统。
xvi S3C2440A MICROCONTROLLER
Table of Contents (Continued)
Chapter 17 Real Time Clock
Overview .............................................................................................................................................17-1
Features .....................................................................................................................................17-1
Real Time Clock Operation...........................................................................................................17-2
Leap Year Generator....................................................................................................................17-2
Read/Write Registers...................................................................................................................17-2
Backup Battery Operation ............................................................................................................17-2
Alarm Function............................................................................................................................17-3
TICK Time Interrupt ......................................................................................................................17-3
32.768kHz X-Tal Connection Example ..........................................................................................17-3
Real Time Clock Special Registers .......................................................................................................17-4
Real Time Clock Control (RTCCON) Register .................................................................................17-4
TICK Time Count (TICNT) Register ................................................................................................17-4
RTC Alarm Control (RTCALM) Register..........................................................................................17-5
ALARM Second Data (ALMSEC) Register .....................................................................................17-6
ALARM Min Data (ALMMIN) Register............................................................................................17-6
ALARM Hour Data (ALMHOUR) Register.......................................................................................17-6
ALARM Date Data (ALMDATE) Register........................................................................................17-7
ALARM Mon Data (ALMMON) Register .........................................................................................17-7
ALARM Year Data (ALMYEAR) Register .......................................................................................17-7
BCD Second (BCDSEC) Register .................................................................................................17-8
BCD Minute (BCDMIN) Register....................................................................................................17-8
BCD Hour (BCDHOUR) Register ...................................................................................................17-8
BCD Date (BCDDATE) Register....................................................................................................17-9
BCD Day (BCDDAY) Register.......................................................................................................17-9
BCD Month (BCDMON) Register...................................................................................................17-9
BCD Year (BCDYEAR) Register ...................................................................................................17-10
Chapter 18 Watchdog Timer
Overview .............................................................................................................................................18-1
Features .....................................................................................................................................18-1
Watchdog Timer Operation...........................................................................................................18-2
Wtdat & Wtcnt ............................................................................................................................18-2
Consideration of Debugging Environment .......................................................................................18-2
Watchdog Timer Special Registers .......................................................................................................18-3
Watchdog Timer Control (WTCON) Register...................................................................................18-3
Watchdog Timer Data (WTDAT) Register.......................................................................................18-4
Watchdog Timer Count (WTCNT) Register .....................................................................................18-4
S3C2440A MICROCONTROLLER xvii
Table of Contents (Continued)
Chapter 19 MMC/SD/SDIO Controller
Features .............................................................................................................................................19-1
Block Diagram ....................................................................................................................................19-1
SD Operation ......................................................................................................................................19-2
SDIO Operation...................................................................................................................................19-3
SDI Special Registers ..........................................................................................................................19-4
SDI Control Register (SDICON).....................................................................................................19-4
SDI Baud Rate Prescaler Register (SDIPRE) .................................................................................19-4
SDI Command Argument Register (SDICmdArg).............................................................................19-5
SDI Command Control Register (SDICmdCon)................................................................................19-5
SDI Command Status Register (SDICmdSta) .................................................................................19-6
SDI Response Register 0 (SDIRSP0) ............................................................................................19-6
SDI Response Register 1 (SDIRSP1) ............................................................................................19-6
SDI Response Register 2 (SDIRSP2) ............................................................................................19-7
SDI Response Register 3 (SDIRSP3) ............................................................................................19-7
SDI Data / Busy Timer Register (SDIDTimer)..................................................................................19-7
SDI Block Size Register (SDIBSize)..............................................................................................19-7
SDI Data Control Register (SDIDatCon) .........................................................................................19-8
SDI Data Remain Counter Register (ADIDatCnt).............................................................................19-9
SDI Data Status Register (ADIDatSta)...........................................................................................19-9
SDI FIFO Status Register (SDIFSTA)............................................................................................19-10
SDI Interrupt Mask Register (SDIIntMsk)........................................................................................19-11
SDI Data Register (SDIDAT) .........................................................................................................19-12
Chapter 20 IIC-Bus Interface
Overview .............................................................................................................................................20-1
IIC-Bus Interface..........................................................................................................................20-3
Start and Stop Conditions ............................................................................................................20-3
Data Transfer Format ...................................................................................................................20-4
ACK Signal Transmission.............................................................................................................20-5
Read-Write Operation ..................................................................................................................20-6
Bus Arbitration Procedures...........................................................................................................20-6
Abort Conditions..........................................................................................................................20-6
Configuring IIC-Bus ......................................................................................................................20-6
Flowcharts of Operations in Each Mode.........................................................................................20-7
IIC-Bus Interface Special Registers .......................................................................................................20-11
Multi-Master IIC-Bus Control (IICCON) Register ..............................................................................20-11
Multi-Master IIC-Bus Control/Status (IICSTAT) Register...................................................................20-12
Multi-Master IIC-Bus Address (IICADD) Register.............................................................................20-13
Multi-Master IIC-Bus Transmit/Receive Data Shift (IICDS) Register...................................................20-13
Multi-Master IIC-Bus Line Contro l(IICLC) Register ..........................................................................20-14
xviii S3C2440A MICROCONTROLLER
Table of Contents (Continued)
Chapter 21 IIS-Bus Interface
Overview .............................................................................................................................................21-1
Block Diagram ....................................................................................................................................21-2
Functional Descriptions........................................................................................................................21-2
Transmit or Receive Only Mode ....................................................................................................21-2
Dma Transfer ..............................................................................................................................21-3
Transmit and Receive Mode..........................................................................................................21-3
Audio Serial Interface Format................................................................................................................21-3
IIS-Bus Format ............................................................................................................................21-3
MSB (Left) Justified .....................................................................................................................21-3
Sampling Frequency and Master Clock .........................................................................................21-4
IIS-Bus Interface Special Registers .......................................................................................................21-5
IIS Control (IISCON) Register........................................................................................................21-5
IIS Mode Register (IISMOD) Register.............................................................................................21-6
IIS Prescaler (IISPSR) Register.....................................................................................................21-7
IIS FIFO Control (IISFCON) Register..............................................................................................21-8
IIS FIFO (IISFIFO) Register...........................................................................................................21-8
Chapter 22 SPI
Overview .............................................................................................................................................22-1
Features .....................................................................................................................................22-1
Block Diagram ............................................................................................................................22-2
SPI Operation .....................................................................................................................................22-3
Programming Procedure...............................................................................................................22-3
SPI Transfer Format.....................................................................................................................22-4
Transmitting Procedure for DMA ...................................................................................................22-5
Receiving Procedure for DMA .......................................................................................................22-5
SPI Special Registers ..........................................................................................................................22-6
SPI Control Register ....................................................................................................................22-6
SPI Status Register.....................................................................................................................22-7
SPI Pin Control Register ..............................................................................................................22-8
SPI Baud Rate Prescaler Register ................................................................................................22-9
SPI Tx Data Register ...................................................................................................................22-9
SPI Rx Data Register...................................................................................................................22-9
S3C2440A MICROCONTROLLER xix
Table of Contents (Continued)
Chapter 23 Camera Interface
Overview .............................................................................................................................................23-1
Features .....................................................................................................................................23-1
Block Diagram ............................................................................................................................23-2
Timing Diagram ...........................................................................................................................23-3
Camera Interface Operation ..................................................................................................................23-5
Two DMA Paths ..........................................................................................................................23-5
Clock Domain .............................................................................................................................23-5
Frame Memory Hirerarchy ............................................................................................................23-6
Memory Storing Method...............................................................................................................23-8
Timing Diagram for Register Setting ..............................................................................................23-9
Timing Diagram for Last IRQ.........................................................................................................23-10
Camera Interface Special Registers.......................................................................................................23-11
Source Format Register ...............................................................................................................23-11
Window Option Register...............................................................................................................23-12
Global Control Register ................................................................................................................23-13
Y1 Start Address Register............................................................................................................23-13
Y2 Start Address Register............................................................................................................23-13
Y3 Start Address Register............................................................................................................23-14
Y4 Start Address Register............................................................................................................23-14
CB1 Start Address Register .........................................................................................................23-14
CB2 Start Address Register .........................................................................................................23-14
CB3 Start Address Register .........................................................................................................23-15
CB4 Start Address Register .........................................................................................................23-15
CR1 Start Address Register .........................................................................................................23-15
CR2 Start Address Register .........................................................................................................23-15
CR3 Start Address Register .........................................................................................................23-16
CR4 Start Address Register .........................................................................................................23-16
Codec Target Format Register ......................................................................................................23-17
Codec Dma Control Register ........................................................................................................23-19
Register Setting Guide for Codec Scaler and Preview Scaler ...........................................................23-20
Codec Pre-Scaler Control Register 1.............................................................................................23-21
Codec Pre-Scaler Control Register 2.............................................................................................23-21
Codec Main-Scaler Control Register..............................................................................................23-22
Codec Dma Target Area Register..................................................................................................23-22
Codec Status Register.................................................................................................................23-23
RGB1 Start Address Register.......................................................................................................23-23
RGB2 Start Address Register.......................................................................................................23-23
RGB3 Start Address Register.......................................................................................................23-24
RGB4 Start Address Register.......................................................................................................23-24
Preview Target Format Register ....................................................................................................23-24
Preview DMA Control Register ......................................................................................................23-25
xx S3C2440A MICROCONTROLLER
Table of Contents (Continued)
Chapter 23 Camera Interface (Continued)
Preview Pre-Scaler Control Register 1 ...........................................................................................23-25
Preview Pre-Scaler Control Register 2 ...........................................................................................23-26
Preview Main-Scaler Control Register ............................................................................................23-26
Preview DMA Target Area Register................................................................................................23-26
Preview Status Register ...............................................................................................................23-27
Image Capture Enable Register.....................................................................................................23-27
Chapter 24 AC97 Controller
Overview .............................................................................................................................................24-1
Features .....................................................................................................................................24-1
AC97 Controller Operation....................................................................................................................24-2
Block Diagram ............................................................................................................................24-2
Internal Data Path........................................................................................................................24-3
Operation Flow Chart ...........................................................................................................................24-4
AC-Link Digital Interface Protocol..........................................................................................................24-5
AC-Link Output Frame (SDATA_OUT) ...........................................................................................24-6
AC-Link Input Frame (SDATA_IN) .................................................................................................24-6
AC97 Powerdown ................................................................................................................................24-7
AC97 Controller Special Registers ........................................................................................................24-9
AC97 Global Control Register (AC_GLBCTRL) ...............................................................................24-9
AC97 Global Status Register (AC_GLBSTAT) ................................................................................24-10
AC97 Codec Command Register (AC_CODEC_CMD).....................................................................24-10
AC97 Codec Status Register (AC_CODEC_STAT) .........................................................................24-11
AC97 PCM Out/In Channel FIFO Address Register (AC_PCMADDR) ...............................................24-11
AC97 MIC in Channel FIFO Address Register (AC_MICADDR) ........................................................24-12
AC97 PCM Out/In Channel FIFO Data Register (AC_PCMDATA).....................................................24-12
AC97 MIC in Channel FIFO Data Register (AC_MICDATA)..............................................................24-12
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