UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 169
UPD75238GJ
Manufacturer Part Number
UPD75238GJ
Description
4 BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC [NEC]
Datasheet
1.UPD75238GJ.pdf
(190 pages)
- Current page: 169 of 190
- Download datasheet (2Mb)
10. APPLICATION BLOCK DIAGRAM
Elec-
tronic
tuner
Remark LPF
Voice level
Power
failure
detection
OSD
LED
Hsync pulse
OSD : On screen display
Hsync : Horizontal synchronous
LPF
R
: Low pass filter
L
4.19/6.0 MHz
INT4
PPO
ANn
ANn
PORTn
SCK1
SO1
X1
Timer
Tuner
System computer
Remote-control reception
Hsync detection
X2
PD75238
XT1
XT2
32.768 kHz
S0-S17
PORT7
PORTn
T0-T15
SCK0
INT0
SO0
BUZ
Servo IC
BZ Piezo-electric
Fluorescent indicator
panel (FIP)
18 segments
PC1490
buzzer
Key matrix
(18
PD75238
Mechan-
ical
compo-
nents
Remote
controller
signal
4)
16 digits
169
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