M3727GM6 Datasheet, PDF (122/129 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M3727GM6/M8–XXXSP/FP M37272E8SP/FP
Address 00F916
I²C Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I²C control register (S1D address 00F916)
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 mode
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
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
Note: When using ports P11-P14 as I²C-BUS interface, the output structure changes
automatically from CMOS output to N-channel open-drain output.
Address 00FA16
I²C Clock Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I²C clock control register (S2 : address 00FA 16)
B
Name
Functions
After reset R W
0 _{SCL frequency control} Setup value Standard clock High speed
to _bits
of CCR4–
mode clock mode
0
4 _{(CCR0 to CCR4)}
CCR0
00 to 02 Setup disabled Setup disabled
03
Setup disabled
333
04
Setup disabled
250
05
100
400 (See note)
06
83.3
166
500/CCR value 1000/CCR value
1D
17.2
34.5
1E
16.6
33.3
1F
16.1
32.3
(at φ = 4 MHz, unit : kHz)
5 SCL mode
0: Standard clock mode
0
specification bit
1: High-speed clock mode
(FAST MODE)
RW
RW
6 ACK bit
(ACK BIT)
0: ACK is returned.
1: ACK is not returned.
0 _RW
7 ACK clock bit
(ACK)
0: No ACK clock
1: ACK clock
0 _RW
Note: At 4000kHz in the high-speed clock mode, the duty is as below .
“0” period : “1” period = 3 : 2
In the other cases, the duty is as below.
“0” period : “1” period = 1 : 1
Rev.1.00 Apr 01, 2001 page 122 of 127
REJ03B0132-0100Z