C8051F045 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F045

Mixed Signal ISP Flash MCU Family

Silicon Laboratories 

C8051F040/1/2/3/4/5/6/7

24.2.3. High-Speed Output Mode

In High-Speed Output mode, a module’s associated CEXn pin is toggled each time a match occurs

between the PCA Counter and the module's 16-bit capture/compare register (PCA0CPHn and

PCA0CPLn). Setting the TOGn, MATn, and ECOMn bits in the PCA0CPMn register enables the High-

Speed Output mode.

Important Note About Capture/Compare Registers: When writing a 16-bit value to the PCA0 Capture/

Compare registers, the low byte should always be written first. Writing to PCA0CPLn clears the ECOMn bit

to '0'; writing to PCA0CPHn sets ECOMn to '1'.

Write to

PCA0CPLn

0

ENB

Reset

Write to

PCA0CPHn ENB

1

PCA0CPMn

P ECCMT P E

WCA A AOWC

MOPP TGMC

1 MPN n n n F

6nnn

n

n

x 00

0x

PCA0CPLn PCA0CPHn

PCA

Interrupt

PCA0CN

CCCCCCCC

FRCCCCCC

FFFFFF

543210

Enable

16-bit Comparator

PCA

Timebase

PCA0L

PCA0H

Match

Toggle

0

1

TOGn

0 CEXn Crossbar

1

Figure 24.6. PCA High-Speed Output Mode Diagram

Port I/O

308

Rev. 1.5

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