索尼IMX135图像传感器：高灵敏度CSI-2接口数据手册

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"IMX135数据手册是关于索尼1300万像素图像传感器IMX135的技术文档，特别强调了其MIPI CSI-2接口的应用。这款传感器适用于彩色摄像头，采用Exmor-RS™技术，具有高速图像捕捉、高灵敏度和低噪声特性，特别适合在手机和平板电脑等设备中使用。" 索尼IMX135是一款1300万像素的CMOS图像传感器，其尺寸为5.867mm（Type 1/3.06英寸），像素结构为方形，旨在提供优质的彩色成像效果。该传感器的核心技术是Exmor-RS™，这是一种背面照明的像素结构，它通过列并行A/D转换电路实现了高速图像捕捉，同时提高了感光度并降低了噪声，性能优于传统的CMOS图像传感器。 IMX135采用了R、G、B三原色滤色片的主色镶嵌滤镜，能有效地捕获色彩信息。其设计具备高灵敏度、低暗电流和无 smear 特性，确保了清晰的图像质量。传感器内建可变积分时间的电子快门，可以根据不同场景的需求调整曝光时间。在电源管理方面，IMX135支持三种电压：模拟电源2.7V，数字电源1.05V，以及输入/输出接口的1.8V。这种电源配置有助于实现低功耗运行，相比传统的CCD传感器更加节能。此外，这款传感器被设计用于手机和平板电脑等移动设备，但索尼并不保证将其应用于其他类型的设备时能保持相同的质量和可靠性。因此，在考虑将IMX135用于非指定应用时，需要谨慎评估其性能和兼容性。 MIPI CSI-2（Mobile Industry Processor Interface Camera Serial Interface 2）是一种高速、低功耗的串行接口标准，广泛应用于移动设备和其他嵌入式系统中的摄像头模块。IMX135采用MIPI CSI-2接口，意味着它可以无缝集成到现代智能手机和平板电脑的硬件生态系统中，提供高效的数据传输和灵活的系统设计。 IMX135传感器结合了高性能、低功耗和小巧的尺寸，使其成为移动设备和一些专业影像应用的理想选择。其关键技术特点，如高速图像处理、高灵敏度和低噪声，以及与MIPI CSI-2接口的兼容性，都表明了这款传感器在当今图像捕捉领域的领先地位。

IMX135-0APH5-C

Specification of communication bus state

Idle state

Idle state is specified as follows; neither master nor slave device does not drive the SDA and SCL, and these bus

lines are pulled up to Vdd via resister.

Issue “Start condition”

While idle state of 2-wire communication bus, master device (ex. subsequent Image processing LSI, etc.) issues

the communication-start; “start condition; S” by driving SDA from “high” to “low” level. Serial data are transmitted in

8-bit-unit MSB first format. Every 8-bit data transmittion, slave device issues acknowledge or negative

acknowledge (explained later) :A (Acknowlege) / Ᾱ (NegativeAcknowlege).

Data (SDA) are tranmitted in time with SCL cycle. SDA shall toggle while SCL is “low” and hold the value while

SCL is “high”.

The data changes

while the clock is low

Data Sampling

MSB LSB

Start Condition

ACK

SDA

SCL

Bus free State

A5 A4

A1 R/W

Figure 8 Start Condition

Issue “Stop condition”

After A (Acknowlege) / Ᾱ (NegativeAcknowlege) and while SCL is “high”, master device issues communication-

stop; “stop conditon; P” by driving SDA from “low” to “high” level. After issuing “stop”, master release 2-wire serial

bus to idle state.

Stop Condition

SDA

SCL

Bus free state

D5 D4 D3 D2 D1 D0 R/W

ACK

NACK

Figure 9 Stop Condition

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IMX135-0APH5-C

Read/Write operation of 2-wire serial communication

IMX135-0APH5-C has an index function that indicates which address to be accessed. When reading/writing the

value from/to an asked address, the Master must set the address value to the index. Index value is designated by

2-byte of dummy write operation after the slave address transmission. The index value is automatically

incremented “one” by the “Acknowledge/Negative Acknowledge” for data transfer.

IMX135-0APH5-C supports for of read modes and two of write modes being compliant to SMIA 1.0 Part2

Specification; Cemera Control Interface (CCI).

Table 6 Operations Supported by 2-wire Serial Communication

Access mode

CCI Single read from random location

(Single read from an arbitrary address)

CCI Single read from current location

(Single read from the held address)

CCI sequential read starting from random location

(Sequential read starting from an arbitrary address)

CCI sequential read starting from current location

(Sequential read starting from the held address)

CCI single write to random location

(Single write to an arbitrary address)

CCI sequential write starting from random location

(Sequential write starting from an arbitrary address)

CCI single read from random location

The upper level of the figure below shows the sensor internal index value, and the lower level shows the SDA I/O

data flow. The master sets the sensor index value to M by designating the sensor slave address with a write

request,and then designating the address (M). After that the Master generates the Start condition. The Start

condition is generated without generating the Stop condition, so it becomes the Repeated Start condition. Next,

when the Master sends the slave address with a read request, the sensor outputs an Acknowledge followed

immediately by the index address data on SDA. After the Master receives the data, it generates a Negative

Acknowledge and the Stop condition to end the communication.

When reading single datum from asked address register, the master device starts write-operation with the slave

address of IMX135-0APH5-C and by making 2-bytes of dummy write master sets the address value (M) to the

index. After that master issue the “start condition” again instead of issuing “stop condition”. This “start condition” is

recognized as “repeated start condition”. Then transmitting the read request with the slave address,

IMX135-0APH5-C issues the “Acknowledge” and start transmitting the register value from indexed address (M).

Master issues the “Negative Acknowledge” and “stop condition” after receiving the transmission.

The figure below indicates the transition of index value and data on SDA line.

From Master to Slave

From Slave to Master

0 AS A A A P1 A

Previous Index value Index M

S = Start Condition

Sr = Repeated Start Condition

P = Stop Condition

A = Acknowledge

A = Negative Acknowledge

Index

M + 1

Slave Address

[7:1]

[15:8]

[7:0]

Slave Address

[7:1]

Data

[7:0]

Index, value M

Figure 12 CCI single read from random location

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IMX135-0APH5-C

CCI single read from current location

When master transmits slave address, and does not designate index, index value is held. And the inde value is

incremented at the “Acknowledge/NegativeAcknowledge” after reading/writeing the register value. When master

knows the current index value is set to the asked address, master transmits the slave address and read request,

then the value from the register transmitted right after the “Acknowledge” issued by IMX135-0APH5-C. Master

issues the “Negative Acknowledge” and “Stop” and terminate the communication. Since the index value is

incremented one by this “Negative Acknowledge”, master can read the register value of next address with the

same procedure.

From Master to Slave

From Slave to Master

1 AS A P 1 A

A P

S = Start Condition

P = Stop Condition

A = Acknowledge

A = Negative Acknowledge

Previous Index value, K Index K + 1

Index

K + 2

Slave Address

[7:1]

Data

[7:0]

Slave Address

[7:1]

Data

[7:0]

Figure 13 CCI single read from current location

CCI sequential read starting from random location

When reading the data from arbitrary address sequencially, master read the first data by the similar procedure to

“CCI single read from random location” but issues the “Acknowlede” instead of “Negative Acknowledge”, the index

is incremented one by theis “Acknowledge” then master can repeat the read operation. This operation is

terminated when master issues the “Negative Acknowledge”, “Stop condition”, the communication is terminated.

Figure 14 CCI sequential read starting from current location

CCI sequential read starting from current location

When master knows the current index value is set to the asked address, master transmits the slave address and

read request, then the value from the register transmitted right after the “Acknowledge” issued by

IMX135-0APH5-C. Master issues the “Acknowledge” after receiving 1-byte of the data and IMX135-0APH5-C

continuously transmits the data from the next address of register since the index value is incremented one by this

“Acknowledge”. By repeating to issue the “Acknowledge” for every 1-byte reading, master can read the data

sequentially. After reading necessary bytes of data, master issues “Negative Acknowledge” and “stop condition”

and then terminates the communication.

Figure 15 CCI sequential read starting from current location

From Master to Slave

From Slave to Master

0 AS A A P1 A

Index M

A A AA

L bytes of data

S = Start Condition

Sr = Repeated Start Condition

P = Stop Condition

A = Acknowledge

A = Negative Acknowledge

Previous Index value, K Index M + 1

Index

(M + L – 1)

Index

(M + L)

Index, value M

Slave

Address

[7:1]

Address

[15:8]

Address

[7:0]

Slave

Address

[7:1]

Data

[7:0]

Data

[7:0]

Data

[7:0]

From Master to Slave

From Slave to Master

P1 AS

Index K

A A AA

L bytes of data

Slave

Address

[7:1]

Data

[7:0]

Data

[7:0]

Data

[7:0]

S = Start Condition

P = Stop Condition

A = Acknowledge

A = Negative Acknowledge

Index K + 1

Index

(K + L – 1)

Index

(K + L)

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