E2E0032-38-95
¡ Semiconductor
¡ Semiconductor
MSM64172
This version:
MSM64172
Sep. 1998
Previous version: Mar. 1996
4-Bit Microcontroller with Built-in Serial Port and LCD Driver
GENERAL DESCRIPTION
The MSM64172 is a low-power 4-bit microcontroller that incorporates Oki's original CPU core
nX-4/20. The MSM64172 has a minimum instruction execution time of 5
ms
(@ 600 kHz and 3.0
V). The device includes an internal 2016-byte program memory, 128-nibble data memory, two
4-bit input-output ports, 4-bit input port, 8-bit synchronous serial port, LCD driver for up to 92
segments, and buzzer output port. Applications include low-power products with LCD
functions.
FEATURES
• Operating range
Operating frequencies
1.5 V spec.
3.0 V spec. low-speed clock
3.0 V spec. high-speed clock
Operating voltage
Operating temperature
• Memory space
Internal program memory
Internal data memory
• Minimum instruction execution time
• Serial port
• LCD driver
(1) At 1/4 duty and 1/3 bias
(2) At 1/3 duty and 1/3 bias
(3) At 1/2 duty and 1/2 bias
• Buzzer driver
• Watchdog timer
• Clock
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
32.768 kHz (crystal oscillation)
32.768 kHz (crystal oscillation)
600 kHz maximum
(RC oscillation/ceramic resonator oscillation)
0.9 to 1.8 V (1.5 V spec.)
1.8 to 3.6 V (3.0 V spec.)
–10 to +65°C
2016 bytes
128 nibbles
5
ms
@ 600 kHz (3.0 V spec. only)
91.6
ms
@ 32.768 kHz
Clock synchro, 8-bit data transfer
27 outputs (duty ratio switchable by software)
92 segments (max.)
72 segments (max.)
50 segments (max.)
1 output; ON/OFF controllable in four modes
32.768 kHz crystal oscillator
RC oscillator/ceramic oscillator (600 kHz max.)
for high-speed clock (only for 3.0 V spec.)
32.768 kHz
Switchable to high-speed clock by software
(only for 3.0 V spec.)
32.768 kHz
1.5 V/3.0 V (selectable by mask option), low
power consumption
CPU clock
:
Time base clock
• Power supply voltage
:
:
1/29
¡ Semiconductor
• I/O port
Input-output port
Input port
MSM64172
:
:
2 ports
¥
4 bits
1 port
¥
4 bits
(16 out of the 27 LCD driver outputs can be
used as output-only ports by a mask option.)
2 sources
5 sources
: (Product name : MSM64172-¥¥¥GS-K)
: (Product name : MSM64172-¥¥¥GS-2K)
: (Product name : MSM64172-¥¥¥)
¥¥¥
indicates a code number.
• Interrupt sources
External interrupt
:
Internal interrupt
:
• Package options:
56-pin plastic QFP (QFP56-P-910-0.65-K)
56-pin plastic QFP (QFP56-P-910-0.65-2K)
Chip
2/29
BLOCK DIAGRAM
¡ Semiconductor
BIAS
TR2
TR0
(4)
TR1
PCM PCL
PCH
A11 to A8
A7 to A0
ROM
2016B
V
SS1
V
SS2
V
SS3
C1
C2
S0
S1
OSC2
OSC1
XT
XT
RESET
TST1
TST2
V
SSL
BSR
HALT
MIEF
2CLK
RSTG
TST
VR
C
PORT ADDRESS
ALU
LCD
B
A
H
L
X
Y
RAM
128N
S22
COM3/S23
COM2/S24
COM1
COM0
V
SS
TIMING
CONTROLLER
TBC
3
INT
WDT
INT
(4)
(4)
DB7 to DB0
(8)
P1
P2
INT
INT
P1.0
P1.1
P2.3
V
SS
P0
P0.0
P0.1
P0.2
P0.3
SP
ROMR
SIOP
IR
DECODER
(8)
INT
IR
PORT ADDRESS
DB7 to DB0
V
SS
INTC
BD
V
DD
MSM64172
3/29
is the CPU core (nX–4/20).
BD
¡ Semiconductor
MSM64172
PIN CONFIGURATION (TOP VIEW)
S11/P5.3
S12/P6.0
S13/P6.1
S14/P6.2
S15/P6.3
S16
S17
(V
DD
)
S18
S19
S20
S21
S22
COM3/S23
56
55
54
53
52
51
50
49
48
47
46
45
44
43
S10/P5.2
S9/P5.1
S8/P5.0
S7/P4.3
S6/P4.2
S5/P4.1
S4/P4.0
S3/P3.3
S2/P3.2
S1/P3.1
S0/P3.0
P1.0
P1.1
P1.2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
42
41
40
39
38
37
36
35
34
33
32
31
30
29
COM2/S24
COM1
COM0
C2
C1
V
SS3
V
SS2
V
SS1
V
SSL
OSC1
OSC2
XT
XT
RESET
Note: Pin 49 is internally connected to V
DD
, and V
DD
should be supplied from pin 21.
P1.3
P2.0
P2.1
P2.2
P2.3
V
SS
V
DD
P0.0
P0.1
P0.2
P0.3
BD
TST1
TST2
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56-Pin Plastic QFP
4/29
¡ Semiconductor
MSM64172
PIN DESCRIPTIONS
Basic Functions
Function
Symbol
V
DD
V
SS1
V
SS2
Power Supply
V
SS3
V
SS
V
SSL
C1, C2
XT
XT
Oscillation
OSC1
OSC2
P0.0 to P0.3
P1.0 to P2.3
BD
S16 to S22
Ports
S0/P3.0 to
S15/P6.3
COM3/S23
COM2/S24
COM1
COM0
Reset
Test
RESET
TST1
TST2
Type
—
—
—
—
—
—
—
I
O
I
O
I
I/O
O
O
O
O
O
O
O
I
I
I
Description
0 V power supply
Bias output for driving LCD (–1.5 V), or negative power supply at 1.5 V spec.
Bias output for driving LCD (–3.0 V), or negative power supply at 3.0 V spec.
Bias output for driving LCD (–4.5 V).
Negative power supply for I/O port interface
Negative power supply for internal logic (internally generated constant voltage)
Pins for connecting a capacitor for generating V
SS1
, V
SS2
, and V
SS3
.
32.768 kHz crystal connection pins
High-speed clock pins :
A ceramic resonator and capacitors, or an external oscillation resistor (R
OS
),
should be connected to these pins.
Input port
Input-output ports
Buzzer driver pin
LCD driver pins
LCD driver pins or output ports by mask option
LCD common 3 signal output pin, or segment signal output pin
during 1/3 or 1/2 duty
LCD common 2 signal output pin, or segment signal output pin
during 1/2 duty
LCD common 1 signal output pin
LCD common 0 signal output pin
Reset pin
Input pins for testing
Secondary Functions
Symbol
P1.3
P2.0
P2.1
P2.2
P2.3
Type
I
O
O
I/O
O
Serial data input pin (SIN)
Serial data output pin (SOUT)
Serial communication ready signal output pin (SPR)
Serial communication clock input-output pin (SCLK)
High-speed oscillation clock monitor pin for system clock (MON)
Description
5/29
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