參數(shù)資料
型號: M37274MA
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 8 Bits Microcomputer(8位單片機(jī))
中文描述: 單芯片8位單片機(jī)(8位單片機(jī))
文件頁數(shù): 117/131頁
文件大?。?/td> 2049K
代理商: M37274MA
117
MITSUBISHI MICROCOMPUTERS
M37274MA-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
I
2
C Clock Control Register
I
2
C Control Register
Address 00F9
16
Address 00FA
16
b7 b6 b5 b4 b3 b2 b1 b0
0
to
2
Bit counter
(Number of transmit/recieve
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
3
I
2
C-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
bit (10BIT SAD)
0
:
7-bit addressing format
1
:
10-bit addressing format
6, 7 Connection control bits
between I C-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
0
0
0
0
I
2
C control register (S1D : address 00F9
16
)
I
2
C Control Register
B
Name
Functions
After reset
R W
Note:
When using ports P1
1
-P1
4
as I C-BUS interface, the output structure changes
automatically from CMOS output to N-channel open-drain output.
R W
R W
R W
R W
R W
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
R W
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
333
250
03
04
05
06
Setup disabled
100
83.3
400 (See note)
166
500/CCR value
17.2
16.6
16.1
1000/CCR value
34.5
33.3
32.3
.
1D
1E
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
R W
R W
R W
R W
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