Hitachi H8S/2378, H8S/2378R Series Hardware Manual page 772

before clearing RDRF, to be returned to the master device, is reflected to the next transmit
frame.
4. The last byte data is read by reading ICDRR.
SCL
(master output)
SDA
(master output)
SCL
(slave output)
SDA
(slave output)
RDRF
ICDRS
ICDRR
User
processing
Figure 16.11 Slave Receive Mode Operation Timing 1
SCL
(master output)
SDA
(master output)
SCL
(slave output)
SDA
A
(slave output)
RDRF
ICDRS
ICDRR
User
processing
Figure 16.12 Slave Receive Mode Operation Timing 2
Rev. 1.0, 09/01, page 728 of 904
9 1 2
Bit 7 Bit 6
A
Data 1
[2] Read ICDRR (dummy read), and clear RDRF.
9 1 2 3
Bit 7 Bit 6 Bit 5
Data 1
3 4 5 6
Bit 5 Bit 4 Bit 3 Bit 2
4 5 6 7
Bit 4 Bit 3 Bit 2 Bit 1
[3] Set ACKBT
[3] Read ICDRR,
7 8 9
Bit 1 Bit 0 Bit 7
A
[2] Read ICDRR, and clear RDRF.
8 9
Bit 0
A
Data 2
Data 1
[4] Read ICDRR,
and clear RDRF.
and clear RDRF.
1
Data 2
Data 1