Datasheet

Section 18 I
2
C Bus Interface [Option]
(This function is not available in the H8S/2695)
R01UH0166EJ0600 Rev. 6.00 Page 857 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
Table 18.3 Flags and Transfer States
MST TRS BBSY ESTP STOP IRTR AASX AL AAS ADZ ACKB State
1/0 1/0 0 0 0 0 0 0 0 0 0 Idle state (flag
clearing required)
1 1 0 0 0 0 0 0 0 0 0 Start condition
issuance
1 1 1 0 0 1 0 0 0 0 0 Start condition
established
1 1/0 1 0 0 0 0 0 0 0 0/1 Master mode wait
1 1/0 1 0 0 1 0 0 0 0 0/1 Master mode
transmit/receive end
0 0 1 0 0 0 1/0 1 1/0 1/0 0 Arbitration lost
0 0 1 0 0 0 0 0 1 0 0 SAR match by first
frame in slave mode
0 0 1 0 0 0 0 0 1 1 0 General call
address match
0 0 1 0 0 0 1 0 0 0 0 SARX match
0 1/0 1 0 0 0 0 0 0 0 0/1 Slave mode
transmit/receive end
(except after SARX
match)
0
0
1/0
1
1
1
0
0
0
0
1
0
1
1
0
0
0
0
0
0
0
1
Slave mode
transmit/receive end
(after SARX match)
0 1/0 0 1/0 1/0 0 0 0 0 0 0/1 Stop condition
detected
Bit 0—Start Condition/Stop Condition Prohibit (SCP): Controls the issuing of start and stop
conditions in master mode. To issue a start condition, write 1 in BBSY and 0 in SCP. A retransmit
start condition is issued in the same way. To issue a stop condition, write 0 in BBSY and 0 in SCP.
This bit is always read as 1. If 1 is written, the data is not stored.
Bit 0
SCP Description
0 Writing 0 issues a start or stop condition, in combination with the BBSY flag
1 Reading always returns a value of 1 (Initial value)
Writing is ignored