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HT66F40 Datasheet(PDF) 98 Page - Holtek Semiconductor Inc

Part # HT66F40
Description  Enhanced A/D Flash Type MCU 8-Bit MCU with EEPROM
PDF  244 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F40 Datasheet(HTML) 98 Page - Holtek Semiconductor Inc

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HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Rev. 1.60
98
October 24, 2011
Counter Value
CCRP
CCRA
TnON
TnPAU
TnPOL
CCRP Int.
Flag TnPF
CCRA Int.
Flag TnAF
TM O/P Pin
(TnOC=1)
Time
Counter cleared
by CCRA
Pause Resume
Counter Stop if
TnON bit low
Counter Reset when
TnON returns high
TnDPX = 1; TnM [1:0] = 10
PWMDutyCycle
set by CCRP
PWM resumes
operation
Output controlled by
other pin-shared function
Output Inverts
when TnPOL = 1
PWM Period
set by CCRA
TM O/P Pin
(TnOC=0)
PWM Mode -- TnDPX = 1
Note:
1. Here TnDPX=1-- Counter cleared by CCRA
2. A counter clear sets the PWM Period
3. The internal PWM function continues running even when TnIO [1:0] = 00 or 01
4. The TnCCLR bit has no influence on PWM operation
· CTM, PWM Mode, Edge-aligned Mode, TnDPX=0
CCRP
001b
010b
011b
100b
101b
110b
111b
000b
Period
128
256
384
512
640
768
896
1024
Duty
CCRA
If fSYS = 16MHz, TM clock source is fSYS/4, CCRP = 100b and CCRA =128,
The CTM PWM output frequency = (fSYS/4)/512=fSYS/2048 = 7.8125 kHz, duty = 128/512 = 25%.
If the Duty value defined by the CCRA register is equal to or greater than the Period value, then the PWM output duty
is 100%.
· CTM, PWM Mode, Edge-aligned Mode, TnDPX=1
CCRP
001b
010b
011b
100b
101b
110b
111b
000b
Period
CCRA
Duty
128
256
384
512
640
768
896
1024
The PWM output period is determined by the CCRA register value together with the TM clock while the PWM duty cy-
cle is defined by the CCRP register value.



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