Datasheet

Section 18 I
2
C Bus Interface [Option]
(This function is not available in the H8S/2695)
Page 848 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
The IRIC flag in ICCR is set to 1 on completion of the acknowledge bit transfer, regardless of the
WAIT setting.
The setting of this bit is invalid in slave mode.
Bit 6
WAIT Description
0 Data and acknowledge bits transferred consecutively (Initial value)
1 Wait inserted between data and acknowledge bits
Bits 5 to 3—Serial Clock Select (CKS2 to CKS0): These bits, together with the IICX1 (channel
1) or IICX0 (channel 0) bit in the SCRX register, select the serial clock frequency in master mode.
They should be set according to the required transfer rate.
SCRX
Bit 5
or 6 Bit 5 Bit 4 Bit 3 Transfer Rate
IICX CKS2 CKS1 CKS0 Clock
φ =
5 MHz
φ =
8 MHz
φ =
10 MHz
φ =
16 MHz
φ =
20 MHz
φ =
25 MHz
φ =
28 MHz
0 0 0 0 φ/28 179 kHz 286 kHz 357 kHz 571 kHz
*
714 kHz
*
893 kHz
*
1000 kHz
*
1 φ/40 125 kHz 200 kHz 250 kHz 400 kHz 500 kHz
*
625 kHz
*
700 kHz
*
1 0 φ/48 104 kHz 167 kHz 208 kHz 333 kHz 417 kHz
*
521 kHz
*
583 kHz
*
1 φ/64 78.1 kHz 125 kHz 156 kHz 250 kHz 313 kHz 391 kHz 438 kHz
*
1 0 0 φ/80 62.5 kHz 100 kHz 125 kHz 200 kHz 250 kHz 313 kHz 350 kHz
1 φ/100 50.0 kHz 80.0 kHz 100 kHz 160 kHz 200 kHz 250 kHz 280 kHz
1 0 φ/112 44.6 kHz 71.4 kHz 89.3 kHz 143 kHz 179 kHz 223 kHz 250 kHz
1 φ/128 39.1 kHz 62.5 kHz 78.1 kHz 125 kHz 156 kHz 195 kHz 219 kHz
1 0 0 0 φ/56 89.3 kHz 143 kHz 179 kHz 286 kHz 357 kHz 446 kHz
*
500 kHz
*
1 φ/80 62.5 kHz 100 kHz 125 kHz 200 kHz 250 kHz 313 kHz 350 kHz
1 0 φ/96 52.1 kHz 83.3 kHz 104 kHz 167 kHz 208 kHz 260 kHz 292 kHz
1 φ/128 39.1 kHz 62.5 kHz 78.1 kHz 125 kHz 156 kHz 195 kHz 219 kHz
1 0 0 φ/160 31.3 kHz 50.0 kHz 62.5 kHz 100 kHz 125 kHz 156 kHz 175 kHz
1 φ/200 25.0 kHz 40.0 kHz 50.0 kHz 80.0 kHz 100 kHz 125 kHz 140 kHz
1 0 φ/224 22.3 kHz 35.7 kHz 44.6 kHz 71.4 kHz 89.3 kHz 112 kHz 125 kHz
1 φ/256 19.5 kHz 31.3 kHz 39.1 kHz 62.5 kHz 78.1 kHz 97.7 kHz 109 kHz
Note: * These rates are outside the ranges stipulated in the I
2
C bus interface specifications (normal
mode: max. 100 kHz, high-speed mode: max. 400 kHz).