MPC82X52AS datasheet(39/72 Pages) MEGAWIN

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MEGAWIN

MPC82x52A Data Sheet

named CCF0 and CCF1 in SFR CCON. The CCF0 and CCF1 serve as flags for module-0 and

module-1 respectively. They are set by hardware when either a match or a capture occurs.

These flags also can only be cleared by software.

Fosc/12

Fosc/2

Timer0 overflow

External input

ECI (P3.4)

CPS1 CPS0

ECF

CIDL

CMOD

CCF1 CCF0

CCON

IDLE

PCA

interrupt

To PCA module

16-bit counter

PCA Timer/Counter

SFR: CMOD (PCA Mode Control Register)

Bit-7

Bit-6

Bit-5

Bit-4

Bit-3

Bit-2

Bit-1

Bit-0

CIDL

CPS1

CPS0

ECF

CIDL:=Behavior control of the PCA.

0:= (default)

Disable counting of the PCA counter while the MCU is put under idle state.

1:=

Enable counting of the PCA counter while the MCU is put under idle state.

{ CPS1, CPS0 } := Used to select the clocking source for PCA counter

{ 0, 0 } := set the frequency of the PCA counter clock source as oscillator’s frequency over

{ 0, 1 } := set the frequency of the PCA counter clock source as oscillator’s frequency over 2

{ 1, 0 } := set the PCA counter clock source as Timer-0 overflow

{ 1, 1 } := set the PCA counter clock source as pin ECI(pin P3.4)

ECF:=Control bit of deciding if to pass interrupt from PCA timer overflow to the MCU

0:= (default)

Inhibit the interrupt from PCA timer to the MCU

1:=

Permit the interrupt from PCA timer to the MCU

SFR: CCON (PCA Counter Control Rregister)

Bit-7

Bit-6

Bit-5

Bit-4

Bit-3

Bit-2

Bit-1

Bit-0

CCF1

CCF0

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