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| 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： | 4/22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
4 of 22
NXP Semiconductors
SC18IM700
Master I
2
C-bus controller with UART interface
7.
Functional description
The SC18IM700 is a bridge between a UART port and I
2
C-bus. The UART interface
consists of a full-functional advanced UART. The UART communicates with the host
through the TX and RX pins. The serial data format is fixed: one start bit, 8 data bits, and
one stop bit. After reset the baud rate defaults to 9600 bit/s, and can be changed through
the Baud Rate Generator (BRG) registers.
After a power-up sequence or a hardware reset, the SC18IM700 will send two continuous
bytes to the host to indicate a start-up condition. These two bytes are 0x4F and 0x4B;
‘OK’ in ASCII.
7.1 UART message format
The host initiates an I
2
C-bus data transfer, reads from and writes to SC18IM700 internal
registers through a series of ASCII commands.
Table 3
lists the ASCII commands
supported by SC18IM700, and also their hexadecimal value representation.
Unrecognized commands are ignored by the device.
To prevent the host from handing the SC18IM700 due to an unfinished command
sequence, the SC18IM700 has a time-out feature. The delay between any two bytes of
data coming from the host should be less than 655 ms. If this condition is not met, the
SC18IM700 will time-out and clear the receive buffer. The SC18IM700 then starts to wait
for the next command from the host.
7.1.1
Write N bytes to slave device
The host issues the write command by sending an S character followed by an I
2
C-bus
slave device address, the total number of bytes to be sent, and I
2
C-bus data which begins
with the first byte (DATA 0) and ends with the last byte (DATA N). 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 and start sending the I
2
C-bus data bytes.
Note that the second byte sent is the I
2
C-bus device slave address. The least significant
bit (W) of this byte must be set to 0 to indicate this is an I
2
C-bus write command.
Table 3.
ASCII command
S
P
R
W
I
O
Z
ASCII commands supported by SC18IM700
Hex value
0x53
0x50
0x52
0x57
0x49
0x4F
0x5A
Command function
I
2
C-bus START
I
2
C-bus STOP
read SC18IM700 internal register
write to SC18IM700 internal register
read GPIO port
write to GPIO port
power down
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| SC18IM700IPW,112 | 功能描述:UART 接口集成电路 CTRL I2C W/UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC18IM700IPW,128 | 功能描述:UART 接口集成电路 UART-MASTER I2C RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC18IM700IPW/S8HP | 功能描述:IC CTRL I2CW/UART 16TSSOP 制造商:nxp usa inc. 系列:- 零件状态:在售 协议:I2C 功能:控制器 接口:UART 标准:- 电压 - 电源:2.4 V ~ 3.6 V 电流 - 电源:9mA 工作温度:-40°C ~ 85°C 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商器件封装:16-TSSOP 标准包装:1 |
| SC18IM700IPW112 | 制造商:NXP Semiconductors 功能描述:IC I2C BUS TO UART INTERFACE TSSOP-16 制造商:NXP Semiconductors 功能描述:IC I2C BUS-UART INTERFACE 16TSSOP |
| SC18IM700IPW-F | 功能描述:UART 接口集成电路 UART-MASTER I2C BRIDGE W/GPIO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
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