Rev. 1.00, 05/04, page 331 of 544
13.4.7 IRIC
Setting
Timing and SCL Control
The interrupt request flag (IRIC) is set at different times depending on the WAIT bit in ICMR, the
FS bit in SAR, and the FSX bit in SARX. If the ICDRE or ICDRF flag is set to 1, SCL is
automatically held low after one frame has been transferred in synchronization with the internal
clock. Figures 13.25 to 13.27 show the IRIC set timing and SCL control.
SCL
SDA
IRIC
User processing
Clear IRIC
2
3
1
A
8
7
3
2
1
9
8
7
When WAIT = 0, and FS = 0 or FSX = 0 (I
2
C bus format, no wait)
(a) Data transfer ends with ICDRE = 0 at transmission, or ICDRF = 0 at reception.
(b) Data transfer ends with ICDRE = 1 at transmission, or ICDRF = 1 at reception.
SCL
SDA
IRIC
User processing
Clear IRIC
Clear IRIC
Write to ICDR (transmit)
or read from ICDR (receive)
1
A
8
7
1
9
8
7
Figure 13.25 IRIC Setting Timing and SCL Control (1)
Summary of Contents for H8S/2111B
Page 2: ...Rev 1 00 05 04 page ii of xxxiv...
Page 8: ...Rev 1 00 05 04 page viii of xxxiv...
Page 22: ...Rev 1 00 05 04 page xxii of xxxiv...
Page 30: ...Rev 1 00 05 04 page xxx of xxxiv...
Page 84: ...Rev 1 00 05 04 page 50 of 544...
Page 100: ...Rev 1 00 05 04 page 66 of 544...
Page 126: ...Rev 1 00 05 04 page 92 of 544...
Page 180: ...Rev 1 00 05 04 page 146 of 544...
Page 216: ...Rev 1 00 05 04 page 182 of 544...
Page 254: ...Rev 1 00 05 04 page 220 of 544...
Page 268: ...Rev 1 00 05 04 page 234 of 544...
Page 382: ...Rev 1 00 05 04 page 348 of 544...
Page 462: ...Rev 1 00 05 04 page 428 of 544...
Page 464: ...Rev 1 00 05 04 page 430 of 544...
Page 488: ...Rev 1 00 05 04 page 454 of 544...
Page 496: ...Rev 1 00 05 04 page 462 of 544...
Page 574: ...Rev 1 00 05 04 page 540 of 544...
Page 581: ......
Page 582: ...H8S 2111B Hardware Manual...