UPD16488AP NEC [NEC], UPD16488AP Datasheet - Page 5

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

1. BLOCK DIAGRAM
Remark /xxx indicates active low signals.
/WR(R,/W)
TSTRTST
TSTVIHL
TEST
OSC
D
D
OSC
C1 , C1
C9
TSTIFS
FR
SIGIN1
SIGIN2
OSC
OSC
/RD(E)
6
5
D
(SCL)
/RES
+
+
/CS1
to D
C1A
DOF
CLS
PSX
7
SYNC
,
CS2
SYNC
C86
M/S
(SI)
OUT
C9
RS
OUT
FR
IN1
IN2
0
-
-
Data
register
Oscillator
circuit
DC/DC
converter
I/O
buffer
V
OUT
D/A converter
SEG
V
RS
Command decoder
1
IRS
Op amp
Display data RAM
(128 x 128 x 2 bits)
Display data latch
V
Timing generator
Address decoder
Segment driver
R
Segment
G/S and blink
control
AMP
Data Sheet S15745EJ2V0DS
OUTP
AMP
Register
OUT
SEG
V
128
LCD
V
LC1
LCD voltage generator
COM
Common driver
1
V
LC2
Segment
G/S and blink
timer
Common
timing
generator
V
LC3
COM
V
92
LC4
V
DD1
µ µ µ µ PD16488A
V
DD2
V
SS
5