p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 450

• 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 412 of 658
REJ09B0310-0100
Figure 16.18 Example of Slave Receive Mode Operation Timing (1) (MLS = 0, HNDS= 1)
Figure 16.19 Example of Slave Receive Mode Operation Timing (2) (MLS = 0, HNDS= 1)
(master output)
User processing
(master output)
User processing
(slave output)
(slave output)
(master output)
(master output)
(Pin waveform)
(slave output)
(slave output)
SDA
ICDRR
ICDRF
ICDRS
SCL
SCL
SDA
IRIC
SDA
Data (n-1)
ICDRS
ICDRR
SDA
ICDRF
SCL
SCL
SCL
2
IRIC
C Bus Interface (IIC)
Start condition generation
Data (n-2)
[2] ICDR read
Bit 0
[7] SCL is fixed low until ICDR is read
[9] Set ACKB=1
[8] IRIC clear
8
Data (n-1)
A
[6]
9
[5] ICDR read (Data (n-1))
Bit 7
Bit 7 Bit 6
1
1
1
Undefined value
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
2
2
2
Bit 5
3
3
Data (n-1)
Slave address
3
Data (n)
Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
4
4
4
5
5
5
[7] SCL is fixed low until ICDR is read
[8] IRIC clear
6
6
6
[8] IRIC clear
7
7
7
R/W
8
[7] SCL is fixed low until ICDR is read
8
8
Data (n)
9
[6]
Address+R/W
9
9
A
Interrupt
request
occurrence
Address+R/W
[10] ICDR read
[6]
A
(Data (n))
[10] ICDR read (dummy read)
Data (n)
Bit 7 Bit 6
1
1
Stop condition
generation
[12] IRIC clear
Data 1
[11]
2
2