M34551M4 Datasheet, PDF (1/68 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER

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 µs
(f(XIN)=4.0 MHz, VDD=3.0 V, system clock = f(XIN)/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, “H” 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
ROM (PROM) size
(! 10 bits)
M34551M4-XXXFP
4096 words
M34551E8-XXXFP
(Note)
8192 words
Note: Shipped after writing (shipped in blank: M34551E8FP)
RAM size
(! 4 bits)
280 words
280 words
PIN CONFIGURATION (TOP VIEW)
M34551M4-XXXFP
Package
48P6S-A
48P6S-A
ROM type
Mask ROM
One Time PROM
SEG9
SEG10
SEG11
SEG12
VSS
SEG13
SEG14
SEG15
P20 / SEG16
P21 / SEG17
38 37 36 35 34 33 32 31 30 29 28 27 26 25
39
24
40
23
41
22
42
21
43 _{M34551M4-XXXFP}
20
44
19
45
18
46
17
47
16
48
15
1 2 3 4 5 6 7 8 9 10 11 12 13 14
D7/XCOUT
D6/XCIN
CNVSS
XOUT
XIN
VSS
VDD
CARR
D5 / INT
D4
Outline 48P6S-A