参数资料
型号: ST6375B1/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
封装: SHRINK, PLASTIC, DIP-42
文件页数: 31/84页
文件大小: 861K
代理商: ST6375B1/XXX
37/84
ST6365, ST6375, ST6385 ST6367, ST6377, ST6387
SERIAL PERIPHERAL INTERFACE (Cont’d)
4.3.2 S-BUS/I2C BUS Timing Diagrams
The clock of the S-BUS/I
2C BUS of the ST638x
SPI (single master only) has a fixed bus clock fre-
quency of 62.5KHz. All the devices connected to
the bus must be able to follow transfers with fre-
quencies up to 62.5KHz, either by being able to
transmit or receive at that speed or by applying the
clock synchronization procedure which will force
the master into a wait state and stretch low peri-
ods.
Figure 25. S-BUS Timing Diagram
VA00454
03
4
1
SCL
SEN (TRANSMIT)
SDA (TRANSMIT)
SDA pulled low by receiver
if acknowledged.
^ ^ ^
SDA pulled low by SPI Peripheral.
SDA (RECEIVE)
SEN (RECEIVE)
SEN (START)
SDA (START)
^ ^ ^
SDA pulled low by receiver
if acknowledged.
SEN (STOP)
SDA (STOP)
^ ^ ^
SDA pulled low by receiver if acknowledge. If in receive then there
will be no ACK. by the SPI.
SCL
2
16
A
7
5
57
A
6
12
1
4
3
0
57
A
6
12
1
4
3
0
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