MC908AP8CFBE Datasheet, PDF (247/324 Pages) Freescale Semiconductor, Inc – Microcontrollers

14.8.6 Process Call
SMBus Protocols with PEC and without PEC
START Slave Address W ACK Command Code ACK Data Byte Low ACK Data Byte High ACK
START Slave Address R ACK Data Byte Low ACK Data Byte High NAK
(a) Process Call
STOP
START Slave Address W ACK Command Code ACK Data Byte Low ACK Data Byte High ACK
START Slave Address R ACK Data Byte Low ACK Data Byte High ACK STOP
PEC
(b) Process Call with PEC
Figure 14-18. Process Call
14.8.7 Block Read/Write
NAK STOP
START Slave Address W ACK Command Code ACK Byte Count = N ACK Data Byte 1 ACK
Data Byte 2 ACK
(a) Block Read
Data Byte N ACK STOP
START Slave Address W ACK Command Code ACK Byte Count = N ACK Data Byte 1 ACK
Data Byte 2 ACK
(b) Block Read with PEC
Data Byte N ACK
PEC
ACK STOP
START Slave Address W ACK Command Code ACK START Slave Address R ACK Byte Count = N ACK
Data Byte 1 ACK Data Byte 2 ACK
(c) Block Write
Data Byte N NAK STOP
START Slave Address W ACK Command Code ACK START Slave Address R ACK Byte Count = N ACK
Data Byte 1 ACK Data Byte 2 ACK
(d) Block Write with PEC
Data Byte N ACK
PEC
NAK STOP
Figure 14-19. Block Read/Write
MC68HC908AP Family Data Sheet, Rev. 4
Freescale Semiconductor
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