ARM7TDMI-S微控制器——LPC2148详细资料

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“LPC2148.pdf 是一份关于 LPC2148 微控制器的详细资料，内容全面且清晰。LPC2148 系列基于 ARM7TDMI-S 处理器，集成了从 32KB 到 512KB 不等的高效闪存，并支持实时仿真和嵌入式追踪功能。” LPC2148 是 NXP（原飞利浦）公司推出的一款基于 ARM7TDMI-S 内核的微控制器，它具有高性能和低功耗的特点。这款芯片的主要特性包括： 1. **处理器核心**：LPC2148 使用的是 16 位/32 位 ARM7TDMI-S CPU，支持实时仿真和嵌入式追踪，这使得在开发过程中能够进行高效的调试和性能分析。 2. **内存结构**：该系列微控制器内置了高速闪存，容量从 32KB 到 512KB 不等，满足不同应用的需求。此外，它还拥有一个128位宽的内存接口和独特的加速器架构，确保32位代码能在最高时钟频率下执行。 3. **代码优化**：对于对代码大小有严格要求的应用，LPC2148 支持 16 位 Thumb 模式，这种模式可以在几乎不损失性能的情况下将代码大小减少超过30%。 4. **低功耗与小型化**：由于其小巧的封装和低功耗设计，LPC2148 非常适合对尺寸和功耗有严格要求的应用，如访问控制、销售点设备等。 5. **通信接口**：LPC2148 提供了丰富的串行通信接口，包括 USB 2.0 全速设备接口、多个 UART、SPI、SSP 和 I2C 总线，使其在通信网关、协议转换器、软调制解调器、语音识别和低端成像等领域表现出色，同时提供大缓冲区和高处理能力。 6. **外设**：LPC2148 还配备有各种32位定时器、单或双10位ADC、10位DAC、PWM通道以及多达45个快速GPIO线路，可满足复杂系统的设计需求。 7. **片上SRAM**：8KB 至 40KB 的片上 SRAM 提供了足够的数据暂存空间，有助于提高系统的响应速度和处理效率。 LPC2148 微控制器因其强大的处理能力、丰富的外设接口和灵活的内存配置，成为嵌入式系统设计中的理想选择，尤其适用于需要高效能、低功耗和紧凑尺寸的场合。

Preliminary data sheet Rev. 01 — 3 October 2005 7 of 38

Philips Semiconductors

LPC2141/42/44/46/48

Single-chip 16-bit/32-bit microcontrollers

5.2 Pin description

Table 3: Pin description

Symbol Pin Type Description

P0.0 to P0.31 I/O Port 0: Port 0 is a 32-bit I/O port with individual direction controls for each bit.

Total of 31 pins of the Port 0 can be used as a general purpose bidirectional

digital I/Os while P0.31 is output only pin. The operation of port 0 pins

depends upon the pin function selected via the pin connect block.

Pins P0.24, P0.26 and P0.27 are not available.

P0.0/TXD0/

PWM1

[1]

I/O P0.0 — General purpose input/output digital pin (GPIO).

O TXD0 — Transmitter output for UART0.

O PWM1 — Pulse Width Modulator output 1.

P0.1/RXD0/

PWM3/EINT0

[2]

I/O P0.1 — General purpose input/output digital pin (GPIO).

I RXD0 — Receiver input for UART0.

O PWM3 — Pulse Width Modulator output 3.

I EINT0 — External interrupt 0 input

P0.2/SCL0/

CAP0.0

[3]

I/O P0.2 — General purpose input/output digital pin (GPIO).

I/O SCL0 — I

C0 clock input/output. Open-drain output (for I

C-bus compliance).

I CAP0.0 — Capture input for Timer 0, channel 0.

P0.3/SDA0/

MAT0.0/EINT1

[3]

I/O P0.3 — General purpose input/output digital pin (GPIO).

I/O SDA0 — I

C0 data input/output. Open-drain output (for I

C-bus compliance).

O MAT0.0 — Match output for Timer 0, channel 0.

I EINT1 — External interrupt 1 input.

P0.4/SCK0/

CAP0.1/AD0.6

[4]

I/O P0.4 — General purpose input/output digital pin (GPIO).

I/O SCK0 — Serial clock for SPI0. SPI clock output from master or input to slave.

I CAP0.1 — Capture input for Timer 0, channel 0.

I AD0.6 — ADC 0, input 6.

P0.5/MISO0/

MAT0.1/AD0.7

[4]

I/O P0.5 — General purpose input/output digital pin (GPIO).

I/O MISO0 — Master In Slave OUT for SPI0. Data input to SPI master or data

output from SPI slave.

O MAT0.1 — Match output for Timer 0, channel 1.

I AD0.7 — ADC 0, input 7.

P0.6/MOSI0/

CAP0.2/AD1.0

[4]

I/O P0.6 — General purpose input/output digital pin (GPIO).

I/O MOSI0 — Master Out Slave In for SPI0. Data output from SPI master or data

input to SPI slave.

I CAP0.2 — Capture input for Timer 0, channel 2.

I AD1.0 — ADC 1, input 0. Available in LPC2144/46/48 only.

P0.7/SSEL0/

PWM2/EINT2

[2]

I/O P0.7 — General purpose input/output digital pin (GPIO).

I SSEL0 — Slave Select for SPI0. Selects the SPI interface as a slave.

O PWM2 — Pulse Width Modulator output 2.

I EINT2 — External interrupt 2 input.

P0.8/TXD1/

PWM4/AD1.1

[4]

I/O P0.8 — General purpose input/output digital pin (GPIO).

O TXD1 — Transmitter output for UART1.

O PWM4 — Pulse Width Modulator output 4.

I AD1.1 — ADC 1, input 1. Available in LPC2144/46/48 only.

Preliminary data sheet Rev. 01 — 3 October 2005 8 of 38

Philips Semiconductors

LPC2141/42/44/46/48

Single-chip 16-bit/32-bit microcontrollers

P0.9/RXD1/

PWM6/EINT3

[2]

I/O P0.9 — General purpose input/output digital pin (GPIO).

I RXD1 — Receiver input for UART1.

O PWM6 — Pulse Width Modulator output 6.

I EINT3 — External interrupt 3 input.

P0.10/RTS1/

CAP1.0/AD1.2

[4]

I/O P0.10 — General purpose input/output digital pin (GPIO).

O RTS1 — Request to Send output for UART1. LPC2144/46/48 only.

I CAP1.0 — Capture input for Timer 1, channel 0.

I AD1.2 — ADC 1, input 2. Available in LPC2144/46/48 only.

P0.11/CTS1/

CAP1.1/SCL1

[3]

I/O P0.11 — General purpose input/output digital pin (GPIO).

I CTS1 — Clear to Send input for UART1. Available in LPC2144/46/48 only.

I CAP1.1 — Capture input for Timer 1, channel 1.

I/O SCL1 — I

C1 clock input/output. Open-drain output (for I

C-bus compliance)

P0.12/DSR1/

MAT1.0/AD1.3

[4]

I/O P0.12 — General purpose input/output digital pin (GPIO).

I DSR1 — Data Set Ready input for UART1. Available in LPC2144/46/48 only.

O MAT1.0 — Match output for Timer 1, channel 0.

I AD1.3 — ADC input 3. Available in LPC2144/46/48 only.

P0.13/DTR1/

MAT1.1/AD1.4

[4]

I/O P0.13 — General purpose input/output digital pin (GPIO).

O DTR1 — Data Terminal Ready output for UART1. LPC2144/46/48 only.

O MAT1.1 — Match output for Timer 1, channel 1.

I AD1.4 — ADC input 4. Available in LPC2144/46/48 only.

P0.14/DCD1/

EINT1/SDA1

[3]

I/O P0.14 — General purpose input/output digital pin (GPIO).

I DCD1 — Data Carrier Detect input for UART1. LPC2144/46/48 only.

I EINT1 — External interrupt 1 input.

I/O SDA1 — I

C1 data input/output. Open-drain output (for I

C-bus compliance)

Note: LOW on this pin while

RESET is LOW forces on-chip boot loader to

take over control of the part after reset.

P0.15/RI1/

EINT2/AD1.5

[4]

I/O P0.15 — General purpose input/output digital pin (GPIO).

I RI1 — Ring Indicator input for UART1. Available in LPC2144/46/48 only.

I EINT2 — External interrupt 2 input.

I AD1.5 — ADC 1, input 5. Available in LPC2144/46/48 only.

P0.16/EINT0/

MAT0.2/CAP0.2

[2]

I/O P0.16 — General purpose input/output digital pin (GPIO).

I EINT0 — External interrupt 0 input.

O MAT0.2 — Match output for Timer 0, channel 2.

I CAP0.2 — Capture input for Timer 0, channel 2.

P0.17/CAP1.2/

SCK1/MAT1.2

[1]

I/O P0.17 — General purpose input/output digital pin (GPIO).

I CAP1.2 — Capture input for Timer 1, channel 2.

I/O SCK1 — Serial Clock for SSP. Clock output from master or input to slave.

O MAT1.2 — Match output for Timer 1, channel 2.

Table 3: Pin description

…continued

Symbol Pin Type Description

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