UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 76

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Programmable Period 8-bit PWM
The PWM 4 channel can be programmed to pro-
vide a PWM output with variable pulse width and
period. The PWM 4 has a 16-bit Prescaler, an 8-
bit Counter, a Pulse Width Register, and a Period
Register. The Pulse Width Register defines the
Figure 37. Programmable PWM 4 Channel Block Diagram
76/175
f OSC / 2
Bit 5 (PWME)
PWMCON
CPU RD/WR
Load
16-bit Prescaler
16-bit Prescaler
8
(B4h, B3h)
Register
Counter
16
8
CPU RD/WR
DATA BUS
8-bit PWM4P
8-bit PWM4
Comparator
Comparator
8-bit PWM4
Register
Register
(Period)
8
8
8
8
PWM pulse width time, while the Period Register
defines the period of the PWM. The input clock to
the Prescaler is f
signed to Port 4.7.
Clock
8-bit Counter
Control
PWM4
Match
Reset
8-bit PWM4W
Comparator
Comparator
8-bit PWM4
8-bit PWM4
Register
Register
OSC
(Width)
8
8
8
8
/2. The PWM 4 channel is as-
Load
Bit 6 (PWMP)
PWMCON
Port 4.7
AI07091