UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 169

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

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