p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 457

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

16.4.7
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 16.25 to 16.27 show the IRIC set timing and SCL control.
When WAIT = 0, and FS = 0 or FSX = 0 (I
SCL
SDA
IRIC
User processing
SCL
SDA
IRIC
User processing
IRIC Setting Timing and SCL Control
(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.
7
7
7
7
Figure 16.25 IRIC Setting Timing and SCL Control (1)
8
8
8
8
2
C bus format, no wait)
9
A
9
A
Clear IRIC
Clear IRIC
1
1
Write to ICDR (transmit)
or read from ICDR (receive)
Rev. 1.00 Sep. 21, 2006 Page 419 of 658
2
2
Section 16 I
3
1
1
2
3
C Bus Interface (IIC)
REJ09B0310-0100
Clear IRIC