UPD75518 NEC, UPD75518 Datasheet - Page 82

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

82
f
X
TPGM3
TPGM1
Frequency
divider
Note At 4.19 MHz: 2
1/2
Fig. 4-32 Block Diagram of the Timer/Pulse Generator (PWM Pulse Generation Mode)
PD75518 (A)
Fig. 4-33 Sample Configuration of D/A Conversion Using PD75518(A)
PPO
15
/f
Modulo register H (8)
X
= 7.81 ms
PWM
signal
MODH (8)
8
PWM pulse generator
Modulo latch (14)
Switching
circuit
(IRQTPG set signal)
MODH
V
ref
(2
INTTPG
15
/f
X
= 5.46 ms: 6.0 MHz)
Internal bus
Modulo register L (8)
MODL
7-2
8
Low-pass
filter
(6)
Note
MODL
TPGM5
Selec-
tor
V
AX
(analog voltage)
Output
buffer
TPGM7
PD75518(A)
PPO