Operations Of The 8-Bit Pwm Timer Functions - Fujitsu F2MC-8L F202RA Hardware Manual

CHAPTER 7 8-BIT PWM TIMER
7.7

Operations of the 8-bit PWM Timer Functions

This section describes the operations of the 8-bit PWM timer functions.
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Operations of the 8-bit PWM Timer Functions
To enable 8-bit PWM timer functions, set registers as shown in Figure 7.7-1 .
CNTR
COMR
: Used bit
: Unused bit
: Set "1".
1
When the counter is activated, the counter is incremented from 00
clock. The output (PWM waveform) of the PWM pin is "H" until a match between the counter value and
the value set in the COMR register is found. Once a match is found, the output is "L" until the counter
value overflows (FF
Figure 7.7-2 shows the PWM waveform output to the PWM pin.
150
Figure 7.7-1 Setting 8-bit PWM Timer Functions
bit7 bit6 bit5
P/TX P1
1 1
Set an H-level pulse width (compare value).
→ 00
).
H H
bit4 bit3 bit2
P0 TPE TIR
1
H
bit1 bit0
OE TIE
1
at the start-up of the selected count