
135
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37272M6/M8–XXXSP/FP, M37272MA–XXXSP
M37272E8SP/FP, M37272EFSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.3
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2
2
R
R
R
R
R
b7 b6 b5 b4 b3 b2 b1 b0
I
2
C clock control register (S2 : address 00FA
16
)
I
2
C Clock Control Register
0
to
4
SCL frequency control
bits
(CCR0 to CCR4)
7
5
6
SCL mode
specification bit
(FAST MODE)
0: Standard clock mode
1: High-speed clock mode
0
Standard clock
mode
B Name Functions
After reset
RW
0
0
0
ACK bit
(ACK BIT)
ACK clock bit
(ACK)
0: ACK is returned.
1: ACK is not returned.
0: No ACK clock
1: ACK clock
High speed
clock mode
Setup disabled Setup disabled
00 to 02
Setup disabled
33303
Setup disabled
25004
100
400 (See note)
05
83.3 16606
500/CCR value 1000/CCR value
...
17.2 34.5
1D
16.6 33.3
1E
16.1
32.3
1F
(at
φ
= 4 MHz, unit : kHz)
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
Setup value
of CCR4–
CCR0
RW
RW
RW
RW
Address 00F916
Address 00FA16
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