mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 462

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

F1A/B — Force Logic Level One on PWMA/B
D.9.15 PWM Registers A/B
PWMA — PWM Register A
PWMB — PWM Register B
D.9.16 PWM Count Register
PWMCNT — PWM Count Register
D.9.17 PWM Buffer Registers A/B
PWMBUFA — PWM Buffer Register A
PWMBUFB — PWM Buffer Register B
D-84
MOTOROLA
The value in these registers determines pulse width of the corresponding PWM output.
A value of $00 corresponds to continuously low output; a value of $80 to 50% duty cy-
cle. Maximum value ($FF) selects an output that is high for 255/256 of the period.
Writes to these registers are buffered by PWMBUFA and PWMBUFB.
PWMCNT is the 16-bit free-running counter used for GPT PWM functions.
To prevent glitches when PWM duty cycle is changed, the contents of PWMA and
PWMB are transferred to these read-only registers at the end of each duty cycle. Re-
set state is $0000.
0 = Force logic level zero output on PWMA/B pin.
1 = Force logic level one output on PWMA/B pin.
Table D–53 PWM Frequency Range Using a 16.78 MHz System Clock
PPR[2:0]
000
001
010
011
100
101
110
111
Freescale Semiconductor, Inc.
For More Information On This Product,
Div 16 = 1.05 MHz
Div 128 = 131 kHz
Div 2 = 8.39 MHz
Div 4 = 4.19 MHz
Div 8 = 2.10 MHz
Div 32 = 524 kHz
Div 64 = 262 kHz
Prescaler Tap
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PCLK
SFA/B = 0
PCLK/256
32.8 kHz
16.4 kHz
8.19 kHz
4.09 kHz
2.05 kHz
1.02 kHz
512 Hz
PCLK/32768
SFA/B = 1
64.0 Hz
32.0 Hz
16.0 Hz
256 Hz
128 Hz
8.0 Hz
4.0 Hz
MC68HC16Y3/916Y3
USER’S MANUAL
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