Overview
The LC72321 is a single-chip microcontroller for use in
electronic tuning applications. It includes on chip both
LCD drivers and a PLL circuit that can operate at up to
150 MHz. It features a large-capacity ROM, a highly
efficient instruction set, and powerful hardware.
Functions
Serial I/O
Built-in timer interrupts: 80 s, 1 ms, 2 ms and 5 ms
Stack: Eight levels
Beep control: Six beep tones (2.08, 2.25, 2.5, 3.0, 3.75,
and 4.17 kHz)
Fast programmable divider
General-purpose counters: HCTR for frequency
measurement and LCTR for frequency or period
measurement
LCD driver for displays with up to 56 segments
(1/2 duty, 1/2 bias)
Program memory (ROM): 16 bits
4095
Data memory (RAM): 4 bits
256
All instructions are single-word instructions
Cycle time:
2.67 s, 13.33 s, or 40.00 s (option)
Unlock FF:
0.55 s detection, 1.1 s detection
Timer FF:
1 ms, 5ms, 25ms, 125ms
Input ports*: One dedicated key input port and one
high breakdown voltage port
Output ports*: Two dedicated key output ports, one high
breakdown voltage open drain port
Two CMOS output ports (of which one
can be switched to be used as LCD driver
outputs)
Seven CMOS output ports (mask option
switchable to use as LCD ports)
I/O ports*:
One switchable between input and output
in four-bit units and one switchable
between input and output in one-bit units
Note: * Each port consists of four bits
Program runaway can be detected and a special address
set. (Programmable watchdog timer)
Voltage detection type reset circuit
One 6-bit A/D converter
Two 8-bit D/A converters (PWM)
One external interrupt (The LC72321 provides an
external interrupt, and internal interrupt and a serial I/O
interrupt, one of which can be selected under program
control.)
Hold mode for RAM backup
Sense FF for hot/cold startup determination
PLL: 4.5 to 5.5 V
CPU: 3.5 to 5.5 V
RAM: 1.3 to 5.5 V
Package Dimensions
unit: mm
3174-QIP80E
CMOS LSI
83194TH (OT) No. 4796-1/13
Preliminaly
SANYO: QIP80E
[LC72321]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Single-Chip Microcontroller with PLL
and LCD Driver
LC72321
Ordering number : EN4796A
No. 4796-2/13
LC72321
Pin Assignment
No. 4796-3/13
LC72321
Block Diagram
No. 4796-4/13
LC72321
Specifications
Absolute Maximum Ratings
at Ta = 25C, V
SS
= 0 V
Note:
*
Reference value
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
DD
max
0.3 to +6.5
V
Input voltage
V
IN
1
HOLD, INT, RES, SNS, and the G port
0.3 to +13
V
V
IN
2
Inputs other than V
IN
1
0.3 to V
DD
+ 0.3
V
Output voltage
V
OUT
1
H port
0.3 to +15
V
V
OUT
2
Outputs other than V
OUT
1
0.3 to V
DD
+ 0.3
V
I
OUT
1
All D and H port pins
0 to 5
mA
Output current
I
OUT
2
All E and F port pins
0 to 3
mA
I
OUT
3
All B and C port pins
0 to 1
mA
I
OUT
4
S1 to S28 and all I port pins
0 to 1
mA
Allowable power dissipation
Pd max
Ta = 40 to +85C
300
*
mW
Operating temperature range
Topg
40 to +85
C
Storage temperature range
Tstg
45 to +125
C
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
V
DD
1
CPU and PLL operating
4.5
5.5
V
Supply voltage
V
DD
2
CPU operating
3.5
5.5
V
V
DD
3
Memory retention voltage
1.3
5.5
V
V
IH
1
G port
0.7 V
DD
8.0
V
V
IH
2
RES, INT, HOLD
0.8 V
DD
8.0
V
Input high level voltage
V
IH
3
SNS
2.5
8.0
V
V
IH
4
A port
0.6 V
DD
V
DD
V
V
IH
5
PE0, PE2, F port
0.7 V
DD
V
DD
V
V
IH
6
LCTR (period measurement),
0.8 V
DD
V
DD
V
V
DD
1, PE1, PE3
V
IL
1
G port
0
0.3 V
DD
V
V
IL
2
RES, INT, PE1, PE3
0
0.2 V
DD
V
V
IL
3
SNS
0
1.3
V
Input low level voltage
V
IL
4
A port
0
0.2 V
DD
V
V
IL
5
PE0, PE2, F port
0
0.3 V
DD
V
V
IL
6
LCTR (period measurement), V
DD
1
0
0.2 V
DD
V
V
IL
7
HOLD
0
0.4 V
DD
V
f
IN
1
XIN
4.0
4.5
5.0
MHz
f
IN
2
FMIN, V
IN
2, V
DD
1
10
130
MHz
f
IN
3
FMIN, V
IN
3, V
DD
1
10
150
MHz
Input frequency
f
IN
4
AMIN (L), V
IN
4, V
DD
1
0.5
10
MHz
f
IN
5
AMIN (H), V
IN
5, V
DD
1
2.0
40
MHz
f
IN
6
HCTR, V
IN
6, V
DD
1
0.4
12
MHz
f
IN
7
LCTR (frequency), V
IN
7, V
DD
1
100
500
kHz
f
IN
8
LCTR (period), V
IH
6, V
IL
6, V
DD
1
1
20
10
3
Hz
V
IN
1
XIN
0.50
1.5
Vrms
V
IN
2
FMIN
0.10
1.5
Vrms
Input amplitude
V
IN
3
FMIN
0.15
1.5
Vrms
V
IN
4, 5
AMIN
0.10
1.5
Vrms
V
IN
6, 7
LCTR, HCTR
0.10
1.5
Vrms
Input voltage range
V
IN
8
ADI
0
V
DD
V
Allowable Operating Ranges
at Ta = 40 to +85C, V
DD
= 3.5 to 5.5 V
No. 4796-5/13
LC72321
Electrical Characteristics for the Allowable Operating Ranges
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Hysteresis
V
H
LCTR (period), RES, INT, PE1, PE3
0.1 V
DD
V
Rejected pulse width
P
REJ
SNS
50
s
Power-down detection voltage
V
DET
2.7
3.0
3.3
V
I
IH
1
INT, HOLD, RES, ADI, SNS,
3.0
A
and the G port: V
I
= 5.5 V
I
IH
2
A, E, and F ports: E and F ports with
3.0
A
Input high level current
outputs off, A port with no R
PD
, V
I
= V
DD
I
IH
3
XIN: V
I
= V
DD
= 5.0 V
2.0
5.0
15
A
I
IH
4
FMIN, AMIN, HCTR, LCTR:
4.0
10
30
A
V
I
= V
DD
= 5.0 V
I
IH
5
A port: With an R
PD
, V
I
= V
DD
= 5.0 V
50
A
I
IL
1
INT, HOLD, RES, ADI, SNS,
3.0
A
and the G port: V
I
= V
SS
Input low level current
I
IL
2
A, E, and F ports: E and F ports with
3.0
A
outputs off, A port with no R
PD
, V
I
= V
SS
I
IL
3
XIN: V
IN
= V
SS
2.0
5.0
15
A
I
IL
4
FMIN, AMIN, HCTR, LCTR: V
I
= V
SS
4.0
10
30
A
Input floating voltage
V
IF
A port: With an R
PD
0.05 V
DD
V
Pull-down resistance
R
PD
A port: With an R
PD
, V
DD
= 5.0 V
75
100
200
k
I
OFFH
1
EO1, EO2: V
O
= V
DD
0.01
10
nA
Output high level off leakage current
I
OFFH
2
B, C, D, E, F, and I ports: V
O
= V
DD
3.0
A
I
OFFH
3
H port: V
O
= 13 V
5.0
A
Output low level off leakage current
I
OFFL
1
EO1, EO2: V
O
= V
SS
0.01
10
nA
I
OFFL
2
B, C, D, E, F, and I ports: V
O
= V
SS
3.0
A
V
OH
1
B and C ports: I
O
= 1 mA
V
DD
2.0
V
DD
1.0
V
DD
0.5
V
V
OH
2
E and F ports: I
O
= 1 mA
V
DD
1.0
V
V
OH
3
EO1, EO2: I
O
= 500 A
V
DD
1.0
V
Output high level voltage
V
OH
4
XOUT: I
O
= 200 A
V
DD
1.0
V
V
OH
5
S1 to S28 and the I port: I
O
= 0.1 mA
V
DD
1.0
V
V
OH
6
D port: I
O
= 5 mA
V
DD
1.0
V
V
OH
7
COM1, COM2: I
O
= 25 A
V
DD
0.75
V
DD
0.5
V
DD
0.3
V
V
OL
1
B and C ports: I
O
= 50 A
0.5
1.0
2.0
V
V
OL
2
E and F ports: I
O
= 1 mA
1.0
V
V
OL
3
EO1, EO2: I
O
= 500 A
1.0
V
Output low level voltage
V
OL
4
XOUT: I
O
= 200 A
1.0
V
V
OL
5
S1 to S28 and the I port: I
O
= 0.1 mA
1.0
V
V
OL
6
D port: I
O
= 5 mA
1.0
V
V
OL
7
COM1, COM2: I
O
= 25 A
0.3
0.5
0.75
V
V
OL
8
H port: I
O
= 5 mA
(150
) 0.75
(400
) 2.0
V
Output middle level voltage
V
M
1
COM1, COM2: V
DD
= 5.0 V, I
O
= 25 A
2.0
2.5
3.0
V
A/D conversion error
ADI: V
DD
1
1/2
1/2
LSB
I
DD
1
V
DD
1, f
IN
2 = 130 MHz
15
20
mA
I
DD
2
V
DD
1, PLL stopped, CT = 2.67 s
1.5
mA
(HOLD mode, Figure 1)
I
DD
3
V
DD
1, PLL stopped, CT = 13.33 s
1.0
mA
(HOLD mode, Figure 1)
Current drain
I
DD
4
V
DD
1, PLL stopped, CT = 40.00 s
0.7
mA
(HOLD mode, Figure 1)
V
DD
= 5.5 V, oscillator stopped, Ta = 25C
5
A
I
DD
5
(BACKUP mode, Figure 2)
V
DD
= 2.5 V, oscillator stopped, Ta = 25C
1
A
(BACKUP mode, Figure 2)
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