The LC573904 is a CMOS 4-bit microcontroller that operates on low voltage and very low power consumption. It also
contains 4K-byte ROM, 128 × 4 bits RAM, LCD drivers and melody function.
Features
(1) ROM :4096 × 8 bits
(2) RAM :128 × 4 bits
(3) Cycle Time
Cycle Time Oscillation source Oscillation frequency Power supply voltage Power source
- Input / Output ports : 8 terminals (P0 port : 4 terminals, P1 port : 4 terminals)
[Notes] When using the P1 port for output, the “L” level hold Tr. of P1 should be OFF.
SEG1
COM2
TEST
RCOUT
RCIN
VSS
OSCOUT
OSCIN
RES
S1
S2
32HZ
T3
CUP2
CUP1
COM1
SEG32
LIGHT
ALM
VDD2
VDD1
BAK
S4
S3
P10
P11
P12
P13
P00
P01
P02
P03
60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
61
62
63
64
1
2
3
4
5
6
7
8
9
10
11
Y
X
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
COM3
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
Note:
When a Lithium battery has been selected as the power supply, please note the following points.
There are two modes of use for the lithium battery: Backup mode and Normal mode (backup flag off). In backup mode, the
battery potential is applied directly to the oscillation circuit, whereas in Normal mode only half the battery potential is applied.
Because of the different voltage applied to the oscillation circuit in each mode, there may be a difference in the generated
oscillation frequency. When entering backup mode a corresponding error will arise. If timing accuracy is required (for clocks,
etc), please bear in mind the above in the program design.
The pad coordinates are such that the chip center is taken as the origin and the values for (X, Y) represent the coordinates of the
center point of each pad.
Substrate must be connected to VSS or left open.
•Voltage supply to LCD driver (Li battery version,
EXTV version) (C is connected between VDD1 and
VSS.)
•Voltage supply to logic unit (Ag battery version,
when Back up flag is off in Li battery option.)
•Voltage supply to LCD driver (Ag battery version)
(C is connected between VDD2 and VSS.)
•Voltage supply to logic unit (EXTV version, when
Back up flag is on in Li battery option.)
•Capacitor is required between BAK and VSS in order
to prevent the malfunction of the logic circuit in
Li battery option.
- Capacitor co nnecting terminals for step-up
(or stop
down)
I •4-bit input port
•Input for HALT release
•LSI system is reset by applying VDD to S1 to S4
simultaneously.
•Programmable pull-down resistor
•”L”-level hold Tr.
•CMOS output/P-ch open drain output
•Input for HALT release
•Programmable pull-down resistor
•”L”-level hold Tr.
•”H”-level hold Tr.
•CMOS output/P-ch open drain output
•”H”-level hold Tr.
•Output terminal to deliver melody signal or buzzer
with SAS or TMEL instruction.
(Buzzer : 4kHz/2kHz/1kHz modulation signal or
non modulation signal.)*
(Melody signal : 3 octaves)
O •LCD output terminals for segment
•Possible to use output port for SEG17 to SEG32
(Pad No.13 to 28) by mask option.
Continue.
Ag/Li/EXT-V
Battery version
Ag/Li/EXT-V
”L”-level hold Tr.
Provided/Not pro v ide d
•”L”-level hold Tr.
Provided/Not pro v ide d
•”H”-level hold Tr.
Provided/Not pro v ide d
•Output form CMOS
/P-ch open drain
•”H”-level hold Tr.
Provided/Not pro v ide d
•Output form CMOS
/P-ch open drain
•Output form
segment/CMOS/P ch open drain
•Segment data
SP=0 - FH
DBUS=a/b/c/d/e/f
/g/h
No.6725-8/18
Page 9
LC573904
Name Pin No.
COM1
-COM4
OSCIN 41 37 I Input for 32.768kHz crystal oscillation
OSCOUT 42 38 O Output for 32.768kHz crystal oscillation
RCIN 44 40 I •Input for RC oscillation
RCOUT 45 41 O •Output for RC oscillation
RES 40 36 I Reset
32HZ 37 33 - •Test terminal
T3 36 32 - •Test terminal
TEST 46 42 - •Test terminal
* 4kHz/2kHz/1kHz : For 32.768kHz crystal oscillation, proportional to oscillation frequency.
33
47
64
16
PAD
No.
29
43
60
12
I/O Function description Option
O LCD output terminals for common LCD duty
1/1,1/2,1/3,1/4
R is connected across RCIN and RCOUT, and C is
connected across RCIN and VSS.
R is connected across RCIN and RCOUT.
This terminal should be left unconnected.
This terminal should be left unconnected.
This terminal should be left unconnected.
No.6725-9/18
Page 10
LC573904
Ag battery version
1. Absolute Maximum Ratings at Ta=25±2°C, VSS=0V
Parameter Symbol Pin & Conditions Ratings Unit
VDD1 -0.3 to +4.0 Supply voltage
VDD2 -0.3 to +4.0
Input voltage VIN S1-S4, P00-P03, P10-P13, TEST,
VOUT1 CUP2, OSCOUT, ALM, LIGHT,
VOUT2 SEG1-SEG32, COM1-COM4, CUP1 -0.3 to VDD2+0.3
Peak output
current
(at each pins)
Total output
current
Maximum power
dissipation
Operating
temperature
range
Storage
temperature
range
IOUT1 ALM 4
IOUT2 LIGHT 1
IOUT3 Output except AL M and LIGHT 500
IALL Total output pins. 10 mA
Pdmax QFP64 430 mW
Topr -30 to +70
Tstg -40 to +125
OSCIN, RES, RCIN
P00-P03, P10-P13, RCOUT
2. Recommended Operating Range at Ta=-30°C to + 70°C, VSS=0V
Parameter Symbol Conditions
voltage
Input high voltage VIH S1-S4, RES,
Input low voltage VIL S1-S4, RES,
frequency range
VDD1 1.30 1.65 Operating supply
VDD2 2.4 3.3
P00-P03, P10-P13
P00-P03, P10-P13
fOPG1 •32.768kHz (crystal oscillation)
•VDD1=1.20 - 1.65V (Ta=25°C)
•Refer to figure 1
fOPG2 •RC oscillation
•VDD1=1.20 - 1.65V (Ta=25°C)
•Refer to figure 2
min. typ. max.
VDD1-0.2 VDD1
0 0.2
32 32.768 33 Oscillation
30 100
-0.3 to VDD1+0.3
-0.3 to VDD1+0.3 Output voltage
Ratings
V
mA
A
µ
C
°
Unit
V
kHz
No.6725-10/18
Page 11
LC573904
3. Electrical Characteristics at Ta=-30°C to + 70°C, VSS=0V
Parameter Symbol Conditions
Pull-down transistor
Pull-up transistor RIN2 VDD1=1.55V,
Output high voltage VOH1
Output low voltage VOL1
Output high voltage VOH2
Output middle voltage VOM
Output low voltage VOL2
Output high voltage VOH3
Output low voltage VOL3
Output high voltage VOH4
Output low voltage VOL4
Output high current IOH
Output low current IOL
Step-up voltage VDD2
Current dissipation
(In Halt mode)
Current dissipation
(In operating mode)
Oscillator start -up
voltage
Oscillator sustaining
voltage
Oscillator start-up time tstt VDD1=1.35V
RIN1A VDD1=1.55V, VIL=0.2V,
RIN1B VDD1=1.55V,
RIN3 VDD1=1.55V, TEST, RES 10 300
IDD1
IDD2
IDD3
IDD4
Vstt 1.35
VHOLD
Low level hold Tr. Fig.3 *1
Low level pull in Tr. Fig.3 *1
High level hold Tr. Fig.6 *5
VDD1=1.55V, IOH=-0.4µA *2
VDD1=1.55V, IOL=0.4µA *2
VDD1=1.55V, IOH=-4µA, COM1-4
VDD1=1.55V, IOH=-4µA, IOL=4µA,
fopg=32.768kHz, Fig.4
VDD1=1.55V,
C1=C2=0.1µF, Fig.4,
Cg=16pF,
Crystal osc(CI≤25kΩ),
RC osc(Rext=470 kΩ,
Cext=18pF),
Back-up flag OFF,
Ta≤50°C
VDD1=1.55V, C1=C2=0.1µF,
Fig.4,
Cg=16pF,
Crystal osc(CI≤25kΩ),
RC osc(Rext=470 kΩ,
Cext=18pF),
Back-up flag OFF,
Ta≤50°C
Cg=16pF, Crystal osc(CI≤25kΩ),
Back-up flag ON, Ta=25°C, Fig.5
Cg=16pF, Crystal osc(CI≤25kΩ),
Back-up flag ON, Ta=25°C, Fig.5
Ratings
min. typ. max.
150 300 1000
100 300 500
100 400 2000
VDD2-0.2
0.2
VDD2-0.2
VDD1-0.2 VDD1+0.2
0.2
VDD1-0.6
5
0.6
VDD1-0.2
0.2
-100
100
2.5 2.7 V
RC osc stop 1.0 4.0
RC osc
operating
RC osc stop 3.0 12.0
RC osc
operating
5.0 15.0
7.0 20.0
1.30
10 s
Unit
kΩ
V
A
µ
A
µ
V
No.6725-11/18
Page 12
LC573904
Li battery version
1. Absolute Maximum Ratings at Ta=25±2°C, VSS=0V
Parameter Symbol Pin & Conditions Ratings Unit
VDD1 -0.3 to +4.0 Supply voltage
VDD2 -0.3 to +4.0
Peak output
current
(at each pins)
Total output
current
Maximum power
dissipation
Operating
temperature
range
Storage
temperature
range
2. Recommended Operating Range at Ta=-30°C to + 70°C, VSS=0V
Parameter Symbol Conditions
voltage
Input high voltage VIH S1-S4, RES,
Input low voltage VIL S1-S4, RES,
frequency range
VIN1 OSCIN, RCIN -0.3 to VDD1+0.3 Input voltage
VIN2 S1-S4, P00-P03, P10-P13, TEST, RES -0.3 to VDD2+0.3
VOUT1 CUP2, OSCOUT, RCOUT -0.3 to VDD1+0.3 Output voltage
VOUT2 SEGOUT, COM1-COM4, CUP1, ALM,
IOUT1 ALM 4
IOUT2 LIGHT 1
IOUT3 Output except ALM1 and LIGHT 500 µA
IALL The total all pins. 10 mA
Pdmax QFP64 430 mW
Topr -30 to +70
Tstg -40 to +125
VDD1 1.25 3.60 Operating supply
VDD2 2.5 3.6
fOPG1 •32.768kHz (crystal oscillation)
fOPG2 •RC oscillation
LIGHT, P00-P03, P10-P13
min. typ. max.
VDD2-0.4 VDD2
P00-P03, P10-P13
0 0.4
P00-P03, P10-P13
32 32.768 33 Oscillation
•VDD2=2.5 - 3.6V (Ta=25°C)
•Refer to figure 1
30 150
•VDD2=2.5 - 3.6V (Ta=25°C)
•Refer to figure 2
-0.3 to VDD2+0.3
Ratings
V
mA
C
°
Unit
V
kHz
No.6725-12/18
Page 13
LC573904
3. Electrical Characteristics at Ta=-30°C to + 70°C, VSS=0V
Parameter Symbol Conditions
Pull-down transistor
Pull-up transistor RIN3 VDD2=2.9V,
Output high voltage VOH1
Output low voltage VOL1
Output high voltage VOH2
Output middle voltage VOM
Output low voltage VOL2
Output high voltage VOH3
Output low voltage VOL3
Output high voltage VOH4
Output low voltage VOL4
Output high voltage VOH5
Output low voltage VOL5
Output high current IOH VDD2=2.9V, VOH=VDD2-0.45V *5 -450
Output low current IOL VDD2=2.9V, VOL=0.45V *6 450
Step-down voltage VDD1
(In Halt mode)
(In operating mode)
Oscillator start -up
voltage
Oscillator sustaining
voltage
Oscillator start-up time tstt VDD2=2.0V
RIN1A VDD2=2.9V, VIL=0.4V,
RIN1B VDD2=2.9V,
RIN2 VDD2=2.9V, TEST, RES 10 300
IDD1
IDD2
IDD3
IDD4
Vstt
VHOLD
Low level hold Tr. Fig.3 *1
Low level pull in Tr. Fig.3 *1
High level hold Tr. Fig.9 *5
VDD2=2.9V, IOH=-0.4µA *2
VDD2=2.9V, IOL=0.4µA *2
VDD2=2.9V, IOH=-4µA, COM1-4
VDD2=2.9V, IOH=-4µA, IOL=4µA,
3. Electrical Characteristics at Ta=-30°C to + 70°C, VSS=0V
Parameter Symbol Conditions
Pull-down transistor
Pull-up transistor RIN3 VDD2=2.9V,
Output high voltage VOH1
Output low voltage VOL1
Output high voltage VOH2
Output middle voltage VOM
Output low voltage VOL2
Output high voltage VOH3
Output low voltage VOL3
Output high voltage VOH4
Output low voltage VOL4
Output high voltage VOH5
Output low voltage VOL5
Output high current IOH VDD2=2.9V, VOH=VDD2-0.45V *5 -450
Output low current IOL VDD2=2.9V, VOL=0.45V *6 450
Step-down voltage VDD1
(In Halt mode)
(In operating mode)
Oscillator start -up
voltage
Oscillator sustaining
voltage
Oscillator start-up time tstt VDD2=2.0V
RIN1A VDD2=2.9V, VIL=0.4V,
RIN1B VDD2=2.9V,
RIN2 VDD2=2.9V, TEST, RES 10 300
IDD1
IDD2
IDD3
IDD4
Vstt 2.0
VHOLD
Low level hold Tr. Fig.3 *1
Low level pull in Tr. Fig.3 *1
High level hold Tr. Fig.9 *5
VDD2=2.9V, IOH=-0.4µA *2
VDD2=2.9V, IOL=0.4µA *2
VDD2=2.9V, IOH=-4µA, COM1-4
VDD2=2.9V, IOH=-4µA, IOL=4µA,
Electrical Characteristics at Ta=-30C to + 70C, VSS=0V
Parameter Symbol Conditions
Pull-down transistor
Pull-up transistor RIN3 VDD2=5.0V,
Output high voltage VOH1
Output low voltage VOL1
Output high voltage VOH2
Output middle voltage VOM
Output low voltage VOL2
Output high voltage VOH3 VDD2=5.0V, IOH=-2.0mA, ALM VDD2-1.0
Output low voltage VOL3 VDD2=5.0V, IOL=2.0mA, ALM 1.0
Output high voltage VOH4
Output low voltage VOL4
Output high voltage VOH5
Output low voltage VOL5
Output high current IOH VDD2=5.0V, VOH=VDD2-0.75V *5 -750
Output low current IOL VDD2=5.0V, VOL=0.75V *6 750
Step-down voltage V DD1
Current dissipation
(In Halt mode)
Current dissipation
(In operating mode)
Oscillator start -up
voltage
Oscillator sustaining
voltage
Oscillator start-up time tstt VDD2=2.0V, Cg=15pF,
*1 : S1, S2, S3, S4, P10 to P13
RIN1A VDD2=5.0V, VIL=0.4V,
RIN1B VDD2=5.0V,
RIN2 VDD2=5.0V, TEST, RES 10 300
IDD1
IDD2
IDD3
IDD4
Vstt 2.0
VHOLD
Low level hold Tr. Fig.3 *1
Low level pull in Tr. Fig.3 *1
High level hold Tr. Fig.9 *5
VDD2=5.0V, IOH=-0.4µA *2
VDD2=5.0V, IOL=0.4µA *2
VDD2=5.0V, IOH=-4µA, COM1-4
VDD2=5.0V, IOH=-4µµA, IOL=4µA,
*2 : Applied to SEG1 to SEG16 an d LC D driver optio n terminals in SEG17 to SEG32.
*3 : Applied to the CMOS or P-ch open drain terminals in SEG17 to SEG32.
*4 : Applied to the CMOS terminals in SEG17 to SEG32.
*5 : P00 to P03, P10 to P13
*6 : Applied to the CMOS terminals in P00 to P03, P10 to P13.
Unit
kΩ
V
A
µ
A
µ
V
No.6725-16/18
Page 17
LC573904
Crystal oscillation guarante ed constant
A kind of oscillation Producer Oscillator Cg
32.768kHz
Crystal oscillation
CITIZEN CFS-308 16pF (Ag, Li battery version)
15pF (EXT-V version)
SII DT-VT-200 15pF
*Cg must be used J rank (±5%) and CH characteristics.
(Note) •Please place the oscillation-related parts as close to the oscillation pins as possible with the shortest
possible pattern length since the circuit pattern affects the oscillation frequency.
•If you use other oscillators herein, we provide no guarantee for the characteristics.
up time, oscillator sustaining voltage P00-03, P10-13
measurement
No.6725-17/18
Page 18
LC573904
0.1µF
0.1µF
Cext
Rext
BAK
CUP1
CUP2
RCIN
RCOUT
VSS
DUT
OSCIN
OSCOUT
VDD1
VDD2
0.1µF
Cg
Cext
Rext
CUP2
RCIN
RCOUT
VSS
DUT
OSCIN
OSCOUT
BAK
VDD1
VDD2
Cg
Figure7 Current dissipation, step-down voltage Figure 8 Oscillator start-up voltage, oscillator
measurement start-up time, oscillator sustaining
voltage measurment
VDD2
Figure9 Input configuration P00-03, P10-13
[Note]
The specifications above are for a die mounted in a QFP64 type package. The specifications for a die is almost same as ones for
a QFP type package basically. However, the operational characteristics may vary depending on the user’s assembling method.
Therefore, the operating temperature range for a die is specified only in Ta=25°C±2°C.
PS
No.6725-18/18
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