UPD16488AP NEC [NEC], UPD16488AP Datasheet - Page 11

• Manufacturer Part Number: UPD16488AP
• Description: 1/92 DUTY LCD CONTROLLER/DRIVER WITH FOUR-LEVEL GRAY SCALE, ON-CHIP RAM
• Manufacturer: NEC [NEC]

FR
FR
DOF
M/S
CLS
IRS
SIGIN1,
SIGIN2
Symbol
SYNC
Select clock
division
Frame signal
Frame
synchronization
signal
Display blink
Master/slave
V
Signature setting
pins
LCD
regulation
Name
144, 145,
127, 128
125, 126
130, 131
147, 148
Pad No.
76, 77
79, 80
87, 88
Data Sheet S15745EJ2V0DS
Input
Input
Input
Input
I/O
I/O
I/O
I/O
This pin is used to select whether or not to use the divider within
the display clock oscillator.
CLS = H: Use divider
CLS = L: Do not use divider
When using an external clock, the CLS = L setting is input via
the OSC
respectively.
When CLS = H, clock input is via the OS
This pin is used as I/O pin for the LCD's AC conversion signal.
M/S = H: Output
M/S = L: Input
When using the µ PD16488A in master/slave mode, both FR
pins must be connected.
This pin is used as I/O pin for the LCD's AC conversion
synchronization signal.
M/S = H: Output
M/S = L: Input
When the µ PD16488A is used in master/slave mode, both
FR
This pin is used to select between master and slave operation
modes. In master operation mode, it outputs the timing signal
required by the LCD driver and in slave operation mode it inputs
this timing signal from an external source for use in LCD display
synchronization.
M/S = H: Master operation mode
M/S = L: Slave operation mode
Settings dependent on the M/S mode are listed in the following
chart.
This pin is used to select the resistor that is used for V
voltage regulation.
IRS = H: Uses internal resistor
IRS = L: Does not use internal resistor. The V
is regulated using the external voltage division resistor that is
connected to the V
This pin is valid only in master operation mode. In slave
operation mode, this pin is fixed high or low level.
These pins can be used to set a unique signature for the IC. The
signal set via these pins can subsequently be read from the
signature read register (R45).
This pin is used to control the LCD's display blink function.
M/S = H: Output
M/S = L: Input
When the µ PD16488A is used in master/slave mode, both DOF
pins must be connected.
SYNC
M/S
H
L
pins must be connected.
IN1
supply circuit
and OSC
Invalid
Power
Valid
R
pin.
IN2
pins as normal and partial clocks
Description
Output
Input
FR
FR
Output
Input
CIN1
SYNC
pin only.
LCD
µ µ µ µ PD16488A
voltage level
Output
Input
DOF
LCD
(2/3)
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