HD64F2638F20J Datasheet, PDF (1454/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Appendix B Internal I/O Register
ICMR0—I²C Bus Mode Register
ICMR1—I²C Bus Mode Register
H'FF7F
H'FF87
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
IIC0
IIC1
Bit
:7
6
5
4
3
2
MLS WAIT CKS2 CKS1 CKS0 BC2
Initial value : ₀
0
0
0
0
0
R/W
: _R/W
R/W
R/W
R/W
R/W
R/W
1
0
BC1 BC0
0
0
R/W R/W
Bit counter
Bit 2 Bit 1
BC2 BC1
Bit 0
BC0
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Clock sync
serial format
8
1
2
3
4
5
6
7
Bit/frame
PC bus format
9
2
3
4
5
6
7
8
Transmit clock select
SCRX Bit 5 Bit 4 Bit 3 Clock
Transfer rate
bit
5, 6
IICX CKS2 CKS1 CKS0
φ = 5 MHz φ = 8 MHz φ = 10 MHz φ = 16 MHz φ = 20 MHz
0
0
0
0
φ/28
179kHz 286 kHz 357 kHz 571 kHz^* 714 kHz^*
1
φ/40
125kHz 200 kHz 250 kHz 400 kHz 500 kHz^*
1
0
φ/48
104kHz 167 kHz 208 kHz 333 kHz 417 kHz^*
1
φ/64 78.1kHz 125 kHz 156 kHz 250 kHz 313 kHz
1
0
0
φ/80 62.5kHz 100 kHz 125 kHz 200 kHz 250 kHz
1
φ/100 50.0kHz 80.0 kHz 100 kHz 160 kHz 200 kHz
1
0
φ/112 44.6kHz 71.4 kHz 89.3 kHz 143 kHz 179 kHz
1
φ/128 39.1kHz 62.5 kHz 78.1 kHz 125 kHz 156 kHz
1
0
0
0
φ/56 89.3kHz 143 kHz 179 kHz 286 kHz 357 kHz
1
φ/80 62.5kHz 100 kHz 125 kHz 200 kHz 250 kHz
1
0
φ/96 52.1kHz 83.3 kHz 104 kHz 167 kHz 208 kHz
1
φ/128 39.1kHz 62.5 kHz 78.1 kHz 125 kHz 156 kHz
1
0
0
φ/160 31.3kHz 50.0 kHz 62.5 kHz 100 kHz 125 kHz
1
φ/200 25.0kHz 40.0 kHz 50.0 kHz 80.0 kHz 100 kHz
1
0
φ/224 22.3kHz 35.7 kHz 44.6 kHz 71.4 kHz 89.3 kHz
1
φ/256 19.5kHz 31.3 kHz 39.1 kHz 62.5 kHz 78.1 kHz
Note: * These rates are outside the ranges stipulated in the I²C bus interface specifications (normal mode:
max. 100 kHz, high-speed mode: max. 400 kHz).
Wait insert bit
0 Send data followed by acknowledge bit.
1 Insert wait between data and acknowledge bit.
MSB-first/LSB-first select
0 MSB first
1 LSB first
Note: This register is valid only on the H8S/2638, H8S/2639, or H8S/2630 with the I²C bus interface
option added.
Page 1404 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010