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IN5732
1
4BIT SINGLE CHIP MICROCOMPUTER
The IN5732 is a CMOS 4-bit single chip microcomputer that operate on low voltage,
very low current and contain LCD drivers. They also contain a 4 bit parallel processing
ALU, a program memory ROM, many LCD segment outputs, a prescaler, an oscillator.
The IN5732 is especially suited for use in high-grade timepieces, time controllers,
electronic calculators, LCD games with timepiece. The IN5732 is especially suited for use
in audio equipment, copiers, facsimiles with LCD and sub CPU applications.
FEATURES
Supply voltage
1.5V or 3V (Mask option-selectable)
Current dissipation 3.0 uA Typ. (Ag Battery version, 32KHz crystal oscillation, during
timekeeping operation)
1.5 uA Typ. (Li Battery version, 32KHz crystal oscillation, during
timekeeping operation)
Oscillation
Crystal oscillation for timekeeping (32.768 KHz); or CR oscillator.
Output pins for
LCD drive
27 pins
Drivable LCD panel
Number of Drivable LCD segment
1/2
bias
1/2 bias
Static
1/3 duty
1/2 duty
81 segments
54 segments
27 segments
On chip melody
function
3 octaves (the melody length is solfware-controlled. One Musical note
requires one byte.)
Number of input
pins
8
Number of out
pins
3 pins (Output dedicated to alarm: 2 pins, general-purpose output: 1
pin).
Possible to use LCD panel drive output pins as output pin-only ports (Mask option-
selectable)
ROM
2048 X 8 bits
RAM
48 X 4 bits
Cycle Time
CR oscillation at 65 Hz
60us
32.768 KHz crystal
122us
On chip step-up / step down circuit
Instruction set
92 instructions
Table read
instruction
1 level subroutine nesting on-chip 15 bit divider for timekeeping (delivers an overflow single
every 64ms/500ms when a 32.768 KHz crystal is used).
HALT function
IN5732
2
ABSOLUTE MAXIMUM RATINGS at Ta=25 ,V
DD
=0V
Parameter
Sign.
Pins and Conditions
Value
Unit
Maximum Supply Voltage
V
SS1
V
SS2
-4.0 to +0.3 -4.0
to +0.3
V
Maximum Input Voltage
V
IN
S1-4, M1-4, 32Hz, TEST, 10P,
OSCIN, RES
V
SS1
-0.3 to +0.3
V
Maximum Ouptut Voltage
V
OUT1

V
OUT2
32Hz, CUP2, OSCOUT, ALM1,
ALM2, LIGHT
SEGOUT, COM1, COM2, COM3,
CUP1
V
SS1
-0.3 to +0.3

V
SS2
-0.3 to +0.3
V

V
Operating Temperature
Topg
-10 to +65
o
C
Storage Temperature
Tstg
-30 to +125
o
C
ALLOWABLE OPERATING CONDITIONS at Ta=25 + 2
o
C, V
DD
=OV
Parameter
Sign.
Pins and Conditions
min
typ
max
Unit
Supply Voltage
V
SS1
V
SS2
-1.65
-3.3
-1.30
-2.4
V
V
Input 'H'-Level Voltage
V
IH
S1-4,M1-4,
RES
-0.2
0 V
Input 'L'-Level Voltage
V
IL
S1-4, M1-4, RES
V
SS1
V
SS1
+0
.2
V
Operating Frequency
fopgl
fopg2
Ta=-10 to + 65
o
C, crystal
OSC
Ta=-10 to + 65
o
C, CR OSC
32 32.
768
33 kHz
kHz
ELECTRICAL CHARACTERISTICS at Ta=25 +-0.2
o
C V
DD
=0V
Parameter
Sign. Pins and Conditions
min
typ
max
Unit
Input Resistance
R
INIA

R
INIB

R
IN2
V
SS1
=-1.55V, V
IL
=V
SS1
+0.2V,
'L'level hold tr, *1
V
SS1
=-1.55V,
'L'level pull-in tr, *1
V
SS1
=-1.55V, TEST, RES
200

200

10
2000

2000

300
k

k

k
Output 'H'-Level Voltage
V
OH1
V
SS1
=-1.55V, I
OH
=-0.4uA, *2
-0.2
V
Output 'L'-Level Voltage
V
OL1
V
SS1
=-1.55V, I
OL
=0.4uA, *2
V
SS2
+0.2 V
Output 'H'-Level Voltage
V
OH2
V
SS1
=-1.55V, I
OH
=-4uA,
COM1,COM2, COM3
-0.2
V
Output 'H'-Level Voltage
V
OH3
V
SS1
=-1.35V, I
OH
=-250uA,
ALM1, ALM2, LIGHT
-0.65
-1.30 V
Oscillation Start Time
t
ST
C
O
=C
G
=20pF, crystal OSC
(CI