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參數(shù)資料
| 型號(hào)： | M34551M4 |
| 廠(chǎng)商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 單芯片4位CMOS微機(jī)紅外遙控器 |
| 文件頁(yè)數(shù)： | 28/68頁(yè) |
| 文件大?。?/td> | 698K |
| 代理商： | M34551M4 |
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28
MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
(3) LCD RAM
RAM contains areas corresponding to the liquid crystal display.
When “1” is written to this LCD RAM, the display pixel
corresponding to the bit is automatically displayed.
(4) LCD drive waveform
When “1” is written to a bit in the LCD RAM data, the voltage
difference between common pin and segment pin which
correspond to the bit automatically becomes lV
LC3
l and the
display pixel at the cross section turns on.
When returning from reset, and in the RAM back-up mode, a
display pixel turns off because every segment output pin and
common output pin becomes V
LC3
level (=V
DD
).
Fig. 26 LCD RAM map
Table 13 LCD control registers
Not used
LCD on/off bit
LCD duty and bias selection bits
LCD control register L1
L1
3
L1
2
L1
1
L1
0
at reset : 0000
2
at power down : state retained
0
1
0
1
R/W
This bit has no function, but read/write is enabled
Off
On
Not available
L1
1
0
0
1
1
L1
0
0
1
0
1
Duty
1/2
1/3
1/4
Bias
1/2
1/3
1/3
LCD control register L2
at reset : 1111
2
at power down : state retained
W
0
1
0
1
0
1
0
1
SEG
19
P2
3
SEG
18
P2
2
SEG
17
P2
1
SEG
16
P2
0
L2
3
L2
2
L2
1
L2
0
P2
3
/SEG
19
pin function switch bit
P2
2
/SEG
18
pin function switch bit
P2
1
/SEG
17
pin function switch bit
P2
0
/SEG
16
pin function switch bit
Note: “R” represents read enabled, and “W” represents write enabled.
Z
X
Y
Bit
8
9
10
11
12
13
14
15
COM
1
1
0
2
3
2
1
0
3
2
1
0
3
2
1
0
SEG
1
SEG
2
SEG
3
SEG
4
SEG
5
SEG
6
SEG
7
COM
3
SEG
1
SEG
2
SEG
3
SEG
4
SEG
5
SEG
6
SEG
7
COM
2
SEG
1
SEG
2
SEG
3
SEG
4
SEG
5
SEG
6
SEG
7
COM
1
SEG
1
SEG
2
SEG
3
SEG
4
SEG
5
SEG
6
SEG
7
COM
0
SEG
9
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
COM
3
COM
2
COM
1
COM
0
COM
3
COM
2
COM
1
COM
0
SEG
9
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
SEG
9
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
SEG
0
SEG
0
SEG
0
SEG
0
SEG
8
SEG
17
SEG
18
SEG
19
SEG
16
SEG
8
SEG
8
SEG
8
SEG
9
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
SEG
17
SEG
18
SEG
19
SEG
16
SEG
17
SEG
18
SEG
19
SEG
16
SEG
17
SEG
18
SEG
19
SEG
16
Note: The area marked “ ” is not the LCD display RAM.
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