HD6433682 ETC, HD6433682 Datasheet - Page 339

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

Receive Operation
In receive mode, data is latched at the rise of the transfer clock. The transfer clock is output when
MST in ICCR1 is 1, and is input when MST is 0. For receive mode operation timing, refer to
figure 17.15. The reception procedure and operations in receive mode are described below.
1. Set the ICE bit in ICCR1 to 1. Set the MST and CKS3 to CKS0 bits in ICCR1 to 1. (Initial
2. When the transfer clock is output, set MST to 1 to start outputting the receive clock.
3. When the receive operation is completed, data is transferred from ICDRS to ICDRR and
4. To stop receiving when MST = 1, set RCVD in ICCR1 to 1, then read ICDRR. Then, SCL is
processing
(Output)
ICDRT
ICDRS
TDRE
SDA
TRS
User
SCL
setting)
RDRF in ICSR is set. When MST = 1, the next byte can be received, so the clock is
continually output. The continuous reception is performed by reading ICDRR every time
RDRF is set. When the 8th clock is risen while RDRF is 1, the overrun is detected and
AL/OVE in ICSR is set. At this time, the previous reception data is retained in ICDRR.
fixed high after receiving the next byte data.
[2] Set TRS
[3] Write data
to ICDRT
Data 1
Bit 0
Figure 17.14 Transmit Mode Operation Timing
1
[3] Write data
to ICDRT
Bit 1
2
Data 1
Bit 6
7
Data 2
Bit 7
8
Bit 0
Data 2
1
Rev. 3.00, 05/03, page 309 of 472
Bit 6
7
[3] Write data
Bit 7
to ICDRT
8
Data 3
[3] Write data
Data 3
Bit 0
to ICDRT
1