Fig. 2.22 8-Bit Pwm Timer (Timer 1) Block Diagram - Fujitsu MB89140 Series Hardware Manual

8-Bit PWM TIMER
(TIMER 1)
CNTR
P/TX —
IRQ2
System clock

Fig. 2.22 8-bit PWM Timer (Timer 1) Block Diagram

HARDWARE CONFIGURATION
2.8 8-BIT PWM TIMER (TIMER 1)
This timer can be used as an 8-bit timer or PWM controller with 8-bit reso-
lution.
Four clock pulses can be selected.
Block Diagram
Internal data bus
P1 P0 TPE TIR
Timer/
Selector
PWM
1
/
1
1
/
2
1
/
8
1
/
16
P21/PWO0
Register list
8-bit PWM timer consists of control registers (CNTR) and compare registers
(COMR).
Address: 0016
H
Address: 0017
H
2-43
CMR
OE TIE Compare register
Start
8-bit
CLK
counter
CLEAR
OVER FLOW
Comparator
PWM generator
output control
Output
8 bit
W Compare register
COMR
R/W Control register
CNTR
8
8
and
Output
enable
signal