参数资料
型号: SC18IM700IPW
厂商: NXP Semiconductors N.V.
元件分类: 连接器件
英文描述: Master I?C-bus controller with UART interface
封装: SC18IM700IPW<SOT403-1 (TSSOP16)|<<http://www.nxp.com/packages/SOT403-1.html<1<Always Pb-free,;SC18IM700IPW<SOT403-1 (TSSOP16)|<<http://www.nxp.com/packages/SOT403-1.html&
文件页数: 5/22页
文件大小: 118K
代理商: SC18IM700IPW
SC18IM700_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 10 August 2007
5 of 22
NXP Semiconductors
SC18IM700
Master I
2
C-bus controller with UART interface
7.1.2
Read N byte from slave device
The host issues the read command by sending an S character followed by an I
2
C-bus
slave device address, and the total number of bytes to be read from the addressed
I
2
C-bus slave. The frame is then terminated with a P character. Once the host issues this
command, the SC18IM700 will access the I
2
C-bus slave device, get the correct number of
bytes from the addressed I
2
C-bus slave, and then return the data to the host.
Note that the second byte sent is the I
2
C-bus device slave address. The least significant
bit (R) of this byte must be set to 1 to indicate this is an I
2
C-bus write command.
7.1.3
Write to 18IM internal register
The host issues the internal register write command by sending a W character followed by
the register and data pair. Each register to be written must be followed by the data byte.
The frame is then terminated with a P character.
Remark:
Write and read from the internal 18IM register is processed immediately as soon
as the intended register is determined by 18IM.
Fig 3.
Write N bytes to slave device
002aac048
NUMBER
OF BYTES
S CHAR.
SLAVE ADR.
+ W
host sends
DATA 0
DATA N
P CHAR.
Fig 4.
Read N byte from slave device
002aac049
NUMBER
OF BYTES
S CHAR.
SLAVE ADR.
+ R
host sends
18IM responds
P CHAR.
DATA 0
DATA N
Fig 5.
Write to 18IM internal register
002aac050
W CHAR.
REGISTER 0
DATA 0
REGISTER N
DATA N
P CHAR.
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