p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 471
p2125vps20
Manufacturer Part Number
p2125vps20
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.P2125VPS20.pdf
(700 pages)
- Current page: 471 of 700
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Note: This restriction on usage can be canceled by setting the FNC1 and FNC0 bits to B'11 in
11. Note on ICDR read and ICCR access in slave transmit mode
In I
during the time shaded in figure 16.33. However, such read and write operations cause no
problem in interrupt handling processing that is generated in synchronization with the rising
edge of the 9th clock pulse because the shaded time has passed before making the transition to
interrupt handling.
To handle interrupts securely, be sure to keep either of the following conditions.
Read ICDR data that has been received so far or read/write from/to ICCR before starting
Monitor the BC2 to BC0 bit counter in ICMR; when the count is B'000 (8th or 9th clock
2
the receive operation of the next slave address.
pulse), wait for at least two transfer clock times in order to read ICDR or read/write from/to
ICCR during the time other than the shaded time.
C bus interface slave transmit mode, do not read ICDR or do not read/write from/to ICCR
ICXR.
SDA
IRIC
SCL
Figure 16.32 IRIC Flag Clearing Timing When WAIT = 1
SCL = low detected
V
IH
[1] SCL = low determination
Secures a high period
[2] IRIC clear
Rev. 1.00 Sep. 21, 2006 Page 433 of 658
Section 16 I
2
C Bus Interface (IIC)
REJ09B0310-0100
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