Renesas rl78 User Manual
RL78/G1A
CHAPTER 13 SERIAL INTERFACE IICA
Table 13-4. Status During Arbitration and Interrupt Request Generation Timing
Status During Arbitration
Interrupt Request Generation Timing
Jul 04, 2013
During address transmission
At falling edge of eighth or ninth clock following byte transfer
Note 1
Read/write data after address transmission
During extension code transmission
Read/write data after extension code transmission
During data transmission
During ACK transfer period after data transmission
When restart condition is detected during data transfer
When stop condition is generated (when SPIE0 = 1)
Note 2
When stop condition is detected during data transfer
At falling edge of eighth or ninth clock following byte transfer
Note 1
When data is at low level while attempting to generate a restart
condition
When stop condition is generated (when SPIE0 = 1)
Note 2
When stop condition is detected while attempting to generate a
restart condition
When data is at low level while attempting to generate a stop
condition
At falling edge of eighth or ninth clock following byte transfer
Note 1
When SCLA0 is at low level while attempting to generate a
restart condition
Notes 1. When the WTIM0 bit (bit 3 of IICA control register 00 (IICCTL00)) = 1, an interrupt request occurs at the
falling edge of the ninth clock. When WTIM0 = 0 and the extension code’s slave address is received, an
interrupt request occurs at the falling edge of the eighth clock.
2. When there is a chance that arbitration will occur, set SPIE0 = 1 for master device operation.
Remark SPIE0: Bit 4 of IICA control register 00 (IICCTL00)
R01UH0305EJ0200 Rev.2.00
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