Datasheet

Pulse Width Modulator (PWM)
MC9S12DP256 — Revision 1.1
Pulse Width Modulator (PWM)
Reserved Register
(PWMPRSC)
This register is reserved for factory testing of the PWM module and is not
available in normal modes.
Read: always read $00 in normal modes
Write: unimplemented in normal modes
WARNING: Writing to this register when in special modes can alter the PWM
functionality.
PWM Scale A
Register
(PWMSCLA)
PWMSCLA is the programmable scale value used in scaling clock A to
generate clock SA. Clock SA is generated by taking clock A, dividing it
by the value in the PWMSCLA register and dividing that by two.
Clock SA = Clock A / (2 * PWMSCLA)
NOTE: When PWMSCLA = $00, PWMSCLA value is considered a full scale
value of 256. Clock A is thus divided by 512.
Any value written to this register will cause the scale counter to load the
new scale value (PWMSCLA)
.
Address Offset: $0007
Bit 7 6 5 4 3 2 1 Bit 0
Read: 0 0 0 00000
Write:
Reset: 0 0 0 0 0000
= Reserved or unimplemented
Address Offset: $0008
Bit 7 654321Bit 0
Read:
Bit 7 6 5 4 3 2 1 Bit 0
Write:
Reset: 00000000
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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Go to: www.freescale.com
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