PD17202AGF-011_15 Datasheet, PDF (7/30 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND KEY SCAN CIRCUIT FOR FPC (FRONT PANEL CONTROLLER)

µPD17202AGF-011
Pin No.
42
43
44, 45
50, 51
52, 53
54
46
47
48
49
55
Symbol
BLANK
DATA
IC
VDD
XIN
XOUT
RESET
VLCDC
Pin Name
Blank input
Serial data I/O
Internally connected
Power supply
Crystal resonator
Description
By connecting an external controller to this pin, the display
of the LCD panel can be turned ON/OFF.
Input level LCD display status
Low
Lights
High
Extinguishes
To control this pin, connect it to an external controller via
pull-up resistor; otherwise, connect it to GND via pull-down
resistor.
Serial communication data I/O pin.
This pin outputs data from the rising edge of the LOAD pin
(pin 28) after a key data output signal has been received,
to the next rising edge; otherwise, it inputs data.
Connect nothing to these pins.
Connect these pins to GND via pull-down resistor.
Short-circuit pins 52 and 53.
Connect this pin to VDD.
This is a common power supply pin (VDD = 2.2 to 5.5 V).
These pins are used to connect a crystal resonator.
Connect an 8-MHz ceramic oscillator or crystal resonator
to these pins. The accuracy of the watch is influenced
only by the oscillation frequency of the oscillator.
I/O Format
Input
N-ch open-
drain output
–
–
Input
–
Reset input
LCD reference
voltage adjustment
Reset input.
This pin is used to adjust the reference voltage for the
LCD driver.
Example
Input
–
µPD17202AGF-011
VLCDC
VLCD0
VLCD1
VLCD2
CAPL
CAPH
55
56
57
0.47µF
59 ^0.47µF
60 ^0.47µF
0.47µF
61
2 MΩ
56
VLCD0
LCD regulator
LCD regulator pin.
–
57
VLCD1
59
VLCD2
60
CAPL LCD boosting
These pins connect a capacitor used to boost the LCD
–
61
CAPH capacitor
driver voltage.
Connect a capacitor of 0.47 µF between the CAPL and
CAPH pins.
62
COM0 Common signal
These pins output the common signals of the LCD
to
to
output of LCD
controller/driver.
64
COM2 controller/driver
CMOS 3-
state output
5