Arbitration Timing Example - NEC V850/SA1 mPD703015 Preliminary User's Manual

Master 1
SCL
SDA
Master 2
SCL
SDA
Transfer lines
SCL
SDA
Table 10-5. Status during Arbitration and Interrupt Request Generation Timing
Status During Arbitration
During address transmission
Read/write data after address transmission
During extension code transmission
Read/write data after extension code transmission
During data transmission
During ACK signal transfer period after data transmission
When restart condition is detected during data transfer
When stop condition is detected during data transfer
When data is at low level while attempting to output a
restart condition
When stop condition is detected while attempting to
output a restart condition
When data is at low level while attempting to output a stop
condition
When SCL is at low level while attempting to output a
restart condition
264
CHAPTER 10 SERIAL INTERFACE FUNCTION
Figure 10-20. Arbitration Timing Example
At falling edge of eighth or ninth clock following byte transfer
When stop condition is output (when SPIE = 1)
At falling edge of eighth or ninth clock following byte transfer
When stop condition is output (when SPIE = 1)
At falling edge of eighth or ninth clock following byte transfer
Master 1 loses arbitration
Interrupt Request Generation Timing
Hi-Z
Hi-Z
Note 1
Note 2
Note 1
Note 2
Note 1