UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 76

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

f
76
X
TPGM3
TPGM1
Frequency
divider
Note 7.81 ms at 4.19 MHz
1/2
Fig. 4-34 Block Diagram of the Timer/Pulse Generator (PWM Pulse Generation Mode)
PD75238
Fig. 4-35 Sample Configuration of D/A Conversion Using PD75238
PPO
Modulo register H (8)
PWM
signal
MODH (8)
8
PWM pulse generator
Modulo latch (14)
Switching
circuit
INTTPG
(IRQTPG set signal)
(2
15
V
/f
MODH
ref
X
= 5.46 ms: 6.0 MHz)
Modulo
register L (6)
Internal bus
MODL
7-2
Low-pass
filter
8
(6)
Note
(2)
MODL
TPGM5
Selec-
tor
V
AN
(analog voltage)
Output
buffer
TPGM7
PD75238
PPO