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M34551M8 Datasheet

  • M34551M8

  • SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CON...

  • 68頁

  • MITSUBISHI   MITSUBISHI

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MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
DESCRIPTION
The 4551 Group is a 4-bit single-chip microcomputer designed
with CMOS technology. Its CPU is that of the 4500 series using
a simple, high-speed instruction set. The computer is equipped
with an 8-bit timer with a reload register, a 14-bit timer which is
also used as a watchdog timer, a 4-bit timer with a reload register,
a carrier wave output circuit and an LCD control circuit.
The mask ROM version and built-in PROM version of 4551 Group
are produced as shown in the table below.
FEATURES
q
Minimum instruction execution time ............................. 3.0
碌
s
(f(X
IN
)=4.0 MHz, V
DD
=3.0 V, system clock = f(X
IN
)/4)
q
Supply voltage
............................. 2.5 V to 5.5 V (One Time PROM version)
....................................... 2.2 V to 5.5 V (Mask ROM version)
q
System clock switch function
........................................... Clock divided by 4 or not divided
q
LCD control circuit
Segment output ................................................................... 20
Common output .................................................................... 4
q
Carrier wave frequency switch function
System clock, system clock/2, system clock/8,
system clock/12, system clock/16, system clock/24, 鈥淗鈥?fixed
q
Timers
Timer 1 ................................ 8-bit timer with a reload register
Timer 2 ............... 14-bit timer also used as a watchdog timer
Timer LC ............................. 4-bit timer with a reload register
q
Interrupt ................................................................... 3 sources
q
Voltage drop detection circuit ............................................... 1
q
Clock generating circuit (ceramic resonance and quartz-crystal
oscillation)
APPLICATION
Remote control transmitter
Product
M34551M4-XXXFP
ROM (PROM) size
(! 10 bits)
4096 words
RAM size
(! 4 bits)
280 words
280 words
Package
48P6S-A
48P6S-A
ROM type
Mask ROM
One Time PROM
8192 words
M34551E8-XXXFP
(Note)
Note: Shipped after writing (shipped in blank: M34551E8FP)
PIN CONFIGURATION (TOP VIEW)
RESET
24
23
22
21
COM
2
COM
1
38 37 36 35 34 33 32 31 30 29 28 27 26 25
SEG
9
SEG
10
SEG
11
SEG
12
V
SS
SEG
13
SEG
14
SEG
15
P2
0
/ SEG
16
P2
1
/ SEG
17
39
40
41
42
43
44
45
46
47
48
1
2
3
4
5
6
7
8
9 10 11 12 13 14
COM
3
COM
0
SEG
8
SEG
7
SEG
6
SEG
5
SEG
4
SEG
3
SEG
2
SEG
1
SEG
0
M34551M4-XXXFP
D
7
/X
COUT
D
6
/X
CIN
CNV
SS
X
OUT
X
IN
V
SS
V
DD
CARR
D
5
/ INT
D
4
M34551M4-XXXFP
20
19
18
17
16
15
P0
0
P0
1
P0
3
P2
3
/ SEG
19
P1
1
P2
2
/ SEG
18
P0
2
P1
0
P1
2
P1
3
D
0
D
1
D
2
Outline 48P6S-A
D
3

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