Intel PXA27 Series Design Manual page 267

D.23 Pulse-Width Modulator Controller
The PWM controllers in the PXA27x processor and PXA25x processor are similar with these
exceptions:
•
Features added to the PWM controller of the PXA27x processor:
— There are now four PWMs available (instead of two).
— The PWM signals are now based off a 13-MHz clock signal.
•
Changes to the registers within the PXA25x processor interrupt controller were required to
support the new features of the PXA27x processor PWM controller:
— The names of the following registers were changed to allow for greater clarity of function:
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— Extra registers were added to the PXA27x processor to support the extra PWMs.
Previously, there were two sets of registers for each PWM in the PXA25x processor (for
example, PWM_DUTY0 and PWM_DUTY1). Now, there are four sets of registers in the
PXA27x processor (for example, PWMDCR0, PWMDCR1, PWMDCR2, and
PWMDCR3).
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Intel PXA27x Processor Family Design Guide
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Intel PXA27x Processor and Intel
PWM_CTRLx changed to PWMCRx
PWM_DUTYx changed to PWMDCRx
PWM_PERVALx changed to PWMPCRx
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PXA25x Processor Differences
D-13