MC80F0224 Datasheet, PDF (72/128 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC80F0208/16/24
Preliminary
Source
clock
T3
PWM3E
T3ST
T3CN
PWM3O
[POL=1]
PWM3O
[POL=0]
00
01
02
03
04
7E
7F
80
3FF
00
01
02
Duty Cycle [ (1+7Fh) x 250nS = 32uS ]
Period Cycle [ (3FFh+1) x 250nS = 256uS, 3.9KHz ]
T3CK[1:0] = 00 ( XIN )
T3PWHR = 0CH
T3PPR = FFH
T3PDR = 7FH
Period T3PWHR3 T3PWHR2
1
1
Duty
T3PWHR1 T3PWHR0
0
0
T3PPR (8-bit)
FFH
T3PDR (8-bit)
7FH
Figure 14-21 Example of PWM at 4MHz
T3CK[1:0] = 10 ( 2us )
PWM3HR = 00H
T3PPR = 0DH
T3PDR = 04H
Write T3PPR to 09H
Source
clock
T3
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 00 01 02 03 04 05 06 07 08 09 00 01 02 03 04
PWM3O
POL=1
Duty Cycle
[ (04h+1) x 2uS = 10uS ]
Period Cycle [ (1+0Dh) x 2uS = 28uS, 35.5KHz ]
Duty Cycle
[ (04h+1) x 2uS = 10uS ]
Duty Cycle
[ (04h+1) x 2uS = 10uS ]
Period Cycle [ (1+09h) x 2uS = 20uS, 50KHz ]
Figure 14-22 Example of Changing the Period in Absolute Duty Cycle (@8MHz)
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MAR. 2005 Ver 0.2