p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 414

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

Section 16 I
Rev. 1.00 Sep. 21, 2006 Page 376 of 658
REJ09B0310-0100
Bit
5
4
3
Bit Name
MST
TRS
ACKE
2
C Bus Interface (IIC)
Initial
Value
0
0
0
R/W
R/W
R/W
Description
[MST clearing conditions]
1. When 0 is written by software
2. When lost in bus contention in I
[MST setting conditions]
1. When 1 is written by software (for MST clearing condition
2. When 1 is written in MST after reading MST = 0 (for MST
[TRS clearing conditions]
1. When 0 is written by software (except for TRS setting
2. When 0 is written in TRS after reading TRS = 1 (for TRS
3. When lost in bus contention in I
4. When the SW bit in DDCSWR is changed from 1 to 0
[TRS setting conditions]
1. When 1 is written by software (except for TRS clearing
2. When 1 is written in TRS after reading TRS = 0 (for TRS
3. When 1 is received as the R/W bit after the first frame
Acknowledge Bit Decision and Selection
0: The value of the acknowledge bit is ignored, and
1: If the received acknowledge bit is 1, continuous transfer is
Depending on the receiving device, the acknowledge bit may
be significant, in indicating completion of processing of the
received data, for instance, or may be fixed at 1 and have no
significance.
mode
1)
clearing condition 2)
condition 3)
setting condition 3)
mode
conditions 3 and 4)
clearing conditions 3 and 4)
address matching in I
continuous transfer is performed. The value of the
received acknowledge bit is not indicated by the ACKB bit
in ICSR, which is always 0.
halted.
2
C bus format slave mode
2
2
C bus format master
C bus format master