UPD75518 NEC, UPD75518 Datasheet - Page 81

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

(5) Static output to the PPO pin
When pulse output is unnecessary, the PPO pin can be used as normal static output. In this case, the output
data is set in TPGM4 with TPGM5 being set to 0 and TPGM7 to 1.
Example
Decrease analog output voltage to the lowest level, then increase it to the highest level.
CLR1
MOV
MOV
MOV
MOV
MOV
MOV
CLR1
MOV
MOV
MOV
MOV
SET1
•
•
•
•
•
•
•
•
•
MBE
XA, #01H
MODH, XA
XA, #00H
MODL, XA
XA, #10101010B
TPGM, XA
TPGM.3
XA, #0FFH
MODH, XA
XA, #0FCH
MODL, XA
TPGM.3
; MODH
; MODL
; Enable PWM pulse output
; Disable reloading
; Enable reloading
00
01
PD75518(A)
81