Rev.1.1
CMOS 4-bit
1-chip MICROCOMPUTER
S-14L05AQS
The S-14L05A 4-bit microcomputer integrates ROM, RAM, I/O ports,
timers, an LCD driver and a 16-level detection circuit (4-bit A-D
converter) on one chip.
Since it can operate at 0.9 V, this
microcomputer is ideal for systems that operate on single-battery power
n
Feature
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•
•
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•
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Si gate CMOS process
Operating voltage: 0.9 V to 2.2 V (32 kHz), 1.1 V to 2.2 V (400 kHz)
Operating frequency (instruction execution time): 32.768 kHz (122
µ
s), 76.8 kHz (52
µ
s), 400 kHz (10
µ
s)
ROM: 4K
×
16 bits
RAM: 768
×
4 bits
32 I/O lines
Serial interface: clock synchronous, 8-bit, one channel
Programmable timer: 8-bit one channel
Time-base timer
Watchdog timer
16-level detection circuit
LCD driver: 4 common (or 3 common), 48 segments, internal constant voltage circuit, voltage booster circuit
Buzzer signal output circuit with sound volume switch function
LED display signal output circuit 2 line output of 16.4 kHz signal (at 32.768 kHz)
Interrupt function: 3 external interrupts, 5 internal interrupts
Standby function
Instructions: 37 basic instruction sets (168 including addressing modes)
16-level subroutine nesting
100-pin SQFP (Product name: S-14L05AQS-XXX, XXX is ROM code)
n
Applications
•
•
Pagers
Portable information devices
Seiko Instruments Inc.
1
CMOS 4-bit 1-chip MICROCOMPUTER
S-14L05AQS
n
Pin Assignments
Figure 1
2
Seiko Instruments Inc.
CMOS 4-bit 1-chip MICROCOMPUTER
S-14L05AQS
n
Pin Function
Table 1
Pin No.
46
48
50
63
36
31
32
45
47
28 to 30
33 to 35
24 to 27
Pin Name
V
SS
V
DD
AV
DD
TEST
RESET
CL
1
CL
2
X
1
X
2
V
LC1
to V
LC3
φ
1
to
φ
3
COM
0
to
COM
3
I/O
Input
Input
Functions
GND potential terminal
Positive power supply
16-level detection circuit power supply
Test input (with internal pull-up resistor)
Reset input (with internal pull-up resistor)
Resistor connection pin for main clock CR oscillation
Resistor connection pin for main clock CR oscillation
Crystal connection for subclock oscillation
Crystal connection for subclock oscillation
LCD driver power supply
Capacitor for LCD driver voltage connection pin
System Reset
Input
Input
oscillation stop
oscillation start
V
LC1
=1.0 V
V
LC2
to V
LC3=
V
DD
COM
0
=V
SS
COM
1
to COM
3=
V
DD
*
Input
Input
Output LCD driver common signal output
76 to 100
SEG
0
to SEG
47
Output LCD driver segment signal output
1 to 23
49
AIN
Input 16-level detection circuit analog input
Input port
75 to 72
P
00
to P
03
Input P
00
is also used as external interrupt input (at the fall)
P
01
is also used as external interrupt input (at the rise)
Input port
71 to 68
P
10
to P
13
Input
Also used as key interrupt input
Output port
P
20
is also used as buzzer signal output
67 to 64
P
20
to P
23
Output
P
21
is also used as time-out signal output
P
22
,P
23
are also used as LED display signal output
62 to 59
P
30
to P
33
Output Output port
58 to 55
P
40
to P
43
Output Output port
54 to 51
P
50
to P
53
Output Output port
I/O port (input or output selectable for each bit)
44 to 41
P
60
to P
63
I/O
P
61
, P
62
, P
63
are also used as serial input/output
40 to 37
P
70
to P
73
I/O
I/O port (input or output selectable for each bit)
Input
Output
(V
SS
)
Output (V
SS
)
Output (V
SS
)
Output (V
SS
)
Input
Input
Seiko Instruments Inc.
3
CMOS 4-bit 1-chip MICROCOMPUTER
S-14L05AQS
n
Block Diagram
The
S-14L05A blocks are linked by 4-bit data bus (DB), a 4-bit address bus (AB), a 4-bit RAM address bus (RA),
and a 12-bit operation bus (OB).
P
30
∼
P
33
P
20
∼
P
23
P
10
∼
P
13
P
00
∼
P
03
Watchdog
timer
Programmable
Output port
Output port
Input port
Input port
timer
Time-base
timer
System
reset
P
40
∼
P
43
Output port
P
50
∼
P
53
Output port
P
60
∼
P
63
I/O port
Interrupt control
circuit
System clock
generation circuit
Main clock
generation circuit
Subclock
generation circuit
System clock
Clock for the LCD
P
70
∼
P
73
I/O port
LED
(P
22,
P
23
)
LED display
signal output
circuit
CL
1
Program counter
CL
2
X
1
X
2
Buzzer signal
BZ (P
20
)
output circuit
ACCA
SIO (P
61
)
SCK (P
62
)
SI (P
63
)
RA
AIN
16-level
detection
circuit
Serial I/O
ROM
Instruction
decoder
ALU
SYSA
SYSB
ACCB
DB
OB
SEG
0
∼
SEG
47
COM
0
∼
COM
3
LCD
driver
AB
Constant voltage
circuit
LCD voltage circuit
Page register
AV
DD
V
DD
V
SS
RESET
TEST
RAM
Stack
Stack pointer
Figure 2
n
Absolute Maximum Ratings
Table 2
Item
Storage temperature
Operating temperature
Power supply voltage
Input voltage
Output voltage
Power dissipation
Symbol
Tstg
Topr
V
DD
V
IN
V
OUT
Pd
Conditions
Rating
-40 to +125
-10 to +70
-0.3 to 4.0
V
SS
-0.3 to V
CC
+ 0.3
V
SS
to V
DD
300
Unit
°C
°C
V
V
V
mW
Ta = 25°C
Ta = 25°C
Ta = 25°C
Ta = 25°C
4
Seiko Instruments Inc.
CMOS 4-bit 1-chip MICROCOMPUTER
S-14L05AQS
n
Recommended Operating Conditions
Table 3
Item
Power supply voltage1
Power supply voltage2
Power supply voltage3
Main clock oscillation start
power supply voltage
Main clock oscillation start
power supply voltage
Subclock oscillation start
power supply voltage
Main clock frequency
Subclock frequency 1
Subclock frequency 2
Input Voltage
Symbol
V
DD1
V
DD2
V
DD3
V
STM1
V
STM2
V
STS
f
CL
f
X1
f
X2
V
IN
Internal oscillation
External clock input
Conditions
FAST, SLOW, SLEEP mode
Main clock: 1 MHz MAX.
FAST, SLOW, SLEEP mode
Main clock: 400 kHz MAX.
SUB, STOP mode
Subclock: 76.8 kHz MAX.
Ceramic oscillation:
1 MHz MAX.
CR oscillation:
400 kHz MAX.
Crystal oscillation:
32.768 kHz
Min.
1.2
1.1
0.9
1.2
1.1
1.0
0
Typ.
32.768
76.8
(Ta=-10
°C
to +70
°C)
Max.
2.2
2.2
2.2
2.2
2.2
2.2
1
V
DD
Unit
V
V
V
V
V
V
MHz
kHz
kHz
V
n
DC Characteristics
Table 4
(V
DD
=1.5 V, f
CL
=400 kHz, f
X
=32.768 kHz, Ta=-10
°C
to +70
°C)
Item
Current consumption 1*
Current consumption 2*
Current consumption 3*
Current consumption 4*
High level input voltage
Low level input voltage
High level input leakage
current
Low level input leakage
current
High level input current
Low level input current
High level output current
Low level output current
16-level detection input
voltage
16-level detection high
level input current
16-level detection low
level input current
16-level detection
reference voltage
16-level detection voltage
error
Symbol
I
DD1
I
DD2
I
DD3
I
DD4
V
IH
V
IL
I
LH
I
LL
I
IH
I
IL
I
OH
I
OL
V
AIN
I
AINH
I
AINL
V
REF
V
DET
V
IN
=V
DD
V
IN
=V
SS
Pull-down resistor connected
V
IN
=V
DD
Pull-up resistor connected
V
IN
=V
SS
Output port
V
OUT
=1.2 V
Output port
V
OUT
=0.4 V
V
REF
=V
LC1
V
REF
=V
DD
V
AIN
=0 V
V
AIN
=V
LC1
when V
REF
=V
LC1
V
AIN
=1.0 V when V
REF
=V
DD
V
REF
=V
LC1
V
DD
=1.0 V when V
REF
=V
DD
Conditions
FAST mode, no load, CR oscillation
FAST mode, no load, ceramic oscillation
SLEEP1, 2 mode, no load, CR oscillation
SLEEP1, 2 mode, no load, ceramic oscillation
SUB mode, no load, C
G
=10 pF
Capacitor for tripler 0.47µF
STOP mode, no load, C
G
=10 pF
Capacitor for tripler 0.47µF
Min.
0.8×
V
DD
-1
3
-30
0.5
0
0
-30
0.940
-1/2
Typ.
62
49
43
28
10
9
10
-10
0.25
1.3
-6
7
1.0
Max.
110
95
90
75
45
40
0.2×
V
DD
1
30
-3
-0.1
V
LC1
V
DD
30
1.060
1/2
Unit
µA
µA
µA
µA
V
V
µA
µA
µA
µA
mA
mA
V
µA
µA
V
LSB
* Not including the current consumption of the 16-level detection circuit .
Seiko Instruments Inc.
5
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