MC68HC912BD32CFU10 FREESCALE [Freescale Semiconductor, Inc], MC68HC912BD32CFU10 Datasheet - Page 124

• Manufacturer Part Number: MC68HC912BD32CFU10
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

PWCNTx — PWM Channel Counters
PWPERx — PWM Channel Period Registers
Pulse Width Modulator
PWCNT0
PWCNT1
PWCNT2
PWCNT3
MC68HC912BD32 Rev 1.0
PWPER0
PWPER1
PWPER2
PWPER3
RESET
RESET
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
0
1
6
6
6
6
6
0
6
6
6
6
6
1
Read and write anytime. A write will cause the PWM counter to reset
to $00.
In Special mode, if DISCR = 1, a write does not reset the PWM
counter.
Each channel has its own counter. Each counter may be read any
time without affecting the count or the operation of the corresponding
PWM channel. Writes to a counter cause the counter to be reset to
$00 and force an immediate load of both duty and period registers
with new values. In concatenated mode, writes to the 16-bit counter
by using 16 bit access, or writes to the high order byte of the counter,
will cause reset of the 16-bit counters.Writes to the lower byte of the
counter have no effect. Reads of the 16-bit counter should be made
only by 16 bit access to maintain data coherency.
Read and write anytime.
There is a dedicated period register for each channel. The value in the
period register determines the period of the associated PWM
channel. If written while the channel is enabled, the new value will not
take effect until the existing period terminates, forcing the counter to
reset. The new period is then latched and is used until a new period
Freescale Semiconductor, Inc.
For More Information On This Product,
5
5
5
5
5
0
5
5
5
5
5
1
Go to: www.freescale.com
Pulse Width Modulator
4
4
4
4
4
0
4
4
4
4
4
1
3
3
3
3
3
0
3
3
3
3
3
1
2
2
2
2
2
1
2
2
2
2
2
0
1
1
1
1
1
1
1
1
1
1
1
0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
1
0
$004C
$004D
$004E
$004F
$004A
$004B
$0048
$0049
12-pwm