参数资料
型号: SC18IS600IBS,151
厂商: NXP SEMICONDUCTORS
元件分类: 总线控制器
英文描述: I2C BUS CONTROLLER, PQCC24
封装: 4 X 4 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT616-3, HVQFN-24
文件页数: 5/30页
文件大小: 164K
代理商: SC18IS600IBS,151
SC18IS600_601_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 28 July 2008
13 of 30
NXP Semiconductors
SC18IS600/601
SPI to I2C-bus interface
6.6 SPI message format
6.6.1 Write N bytes to I2C-bus slave device
The SPI host issues the write command by sending a 0x00 command followed by the total
number of bytes (maximum 96 bytes excluding the address) to send and an I2C-bus slave
device address followed by I2C-bus data bytes, beginning with the rst byte (data byte 1)
and ending with the last byte (data byte N). Once the SPI host issues this command, the
SC18IS600/601 will access the I2C-bus slave device and start sending the I2C-bus data
bytes.
When the I2C-bus write transaction has successfully nished, and interrupt is generated
on the INT pin, and the ‘transaction completed’ status can be read in I2CStat.
Note that the third byte sent by the host is the device I2C-bus slave address. The
SC18IS600/601 will ignore the least signicant bit so a write will always be performed
even if the least signicant bit is a ‘1’.
Fig 12. SPI single master multiple slaves conguration
002aab717
master
MISO
MOSI
SPICLK
PORT
slave
SCLK
CS
SC18IS600/601
slave
SCLK
CS
OTHER SPI
DEVICE
Fig 13. Write N bytes to I2C-bus slave device
002aab718
NUMBER
OF BYTES
0x00
COMMAND
SLAVE ADDRESS
+ W
SPI host sends
DATA
BYTE 1
DATA
BYTE N
CS
SCLK
MOSI
data byte 1
data byte N
0
slave address A[7:1]
number of bytes D[7:0]
command 0x00
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