M37161M8/MA/MF-XXXSP/FP,M37161EFSP/FP
2
I C Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C control register (S1D) [Address 00F916
]
After reset
0
B
Name
Functions
R W
R W
Bit counter
(Number of transmit/recieve
b2 b1 b0
0
to
2
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0 : 8
bits)
1 : 7
0 : 6
1 : 5
0 : 4
1 : 3
0 : 2
1 : 1
(BC0 to BC2)
3
4
5
I2C-BUS interface use
enable bit (ESO)
0
0
0
0
0 : Disabled
1 : Enabled
R W
R W
R W
R W
Data format selection
bit(ALS)
0 : Addressing mode
1 : Free data format
Addressing format selection
bit (10BIT SAD)
0 : 7-bit addressing format
1 : 10-bit addressing format
b7 b6 Connection port (See note)
6, 7 Connection control bits
between I2C-BUS interface
and ports
0
0
1
1
0: None
1: SCL1, SDA1
0: SCL2, SDA2
1: SCL1, SDA1
SCL2, SDA2
(BSEL0, BSEL1)
Note: • Set the corresponding direction register to "1" to use the port as multi-master I2C-BUS interface.
• To use SCL1, SDA1, SCL2 and SDA2, set the port P3 Register (address 00C616) bit 2 to 0.
2
Fig. 8.6.6 I C Control Register
Port P3 register
b7 b6 b5 b4 b3 b2 b1 b0
Port P3 register (P3) [Address 00C616]
B
0
1
Name
Functions
data
After reset
Indeterminate
Indeterminate
0
R
R
R
R
W
W
W
W
Port P3 register
Port P3
Port P3
0
1
data
Switch bit of I2C-BUS
interface and port P3
2
0: Port P30, Port P31
1: I2CBUS (SDA3,SCL3)
(BSEL20)
(See note)
SCL3/P3 -SCL1/P1
SDA3/P3 -SDA1/P13
Course connection control bit
(BSEL21)
1
1
3
R
R
0
0
W
–
0: Connection
1: Cutting
0
Nothing is assigned. This bit is write disable bit.
When this bit is read out, the value is "0."
4
5
6
7
Port P3 register
Port P3
Port P3
Port P3
5
6
7
data
data
data
Indeterminate
Indeterminate
Indeterminate
R
R
R
–
–
–
Notes
•
For the ports used as the Multi-master I2C-BUS interface, set their direction registers to 1.
• To use SCL3 and SDA3, set the I2C Control Register (address 00F916) bits 6–7 to 0.
Fig. 8.6.7 Port P3 Register
Rev.1.00 2003.11.25 page 34 of 128
RENESAS [ RENESAS TECHNOLOGY CORP ]
