M37221M4H_15 Datasheet, PDF (38/114 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
I²C Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I²C control register (S1D) [Address 00DA16]
B
Name
Functions
0 Bit counter
to (Number of transmit/recieve
2 bits)
(BC0 to BC2)
b2 b1 b0
0 0 0: 8
0 0 1: 7
0 1 0: 6
0 1 1: 5
1 0 0: 4
1 0 1: 3
1 1 0: 2
1 1 1: 1
After reset R W
0 _RW
3 _I2C-BUS interface use
enable bit (ESO)
0: Disabled
1: Enabled
4 Data format selection
bit(ALS)
0: Addressing format
1: Free data format
5 Addressing format selection 0: 7-bit addressing format
bit (10BIT SAD)
1: 10-bit addressing format
6, 7 Connection control bits
between I²C-BUS interface
and ports
(BSEL0, BSEL1)
b7 b6 Connection port (See note)
0 0: None
0 1: SCL1, SDA1
1 0: SCL2, SDA2
1 1: SCL1, SDA1, SCL2, SDA2
0 _RW
0 _RW
0 _RW
0 _RW
Fig. 8.6.6 I²C Control Register
Rev.1.00 Oct 01, 2002 page 36 of 110
REJ03B0134-0100Z