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

1.5. Programmable Counter Array

The C8051F04x MCU family includes an on-board Programmable Counter/Timer Array (PCA) in addition

to the five 16-bit general purpose counter/timers. The PCA consists of a dedicated 16-bit counter/timer

time base with six programmable capture/compare modules. The timebase is clocked from one of six

sources: the system clock divided by 12, the system clock divided by 4, Timer 0 overflow, an External

Clock Input (ECI pin), the system clock, or the external oscillator source divided by 8.

Each capture/compare module can be configured to operate in one of six modes: Edge-Triggered Capture,

Software Timer, High Speed Output, Frequency Output, 8-Bit Pulse Width Modulator, or 16-Bit Pulse Width

Modulator. The PCA Capture/Compare Module I/O and External Clock Input are routed to the MCU Port I/

O via the Digital Crossbar.

SYSCLK/12

SYSCLK/4

Timer 0 Overflow

ECI

SYSCLK

External Clock/8

PCA

CLOCK

MUX

16-Bit Counter/Timer

Capture/Compare

Module 0

Capture/Compare

Module 1

Capture/Compare

Module 2

Capture/Compare

Module 3

Capture/Compare

Module 4

Capture/Compare

Module 5

Crossbar

Port I/O

Figure 1.10. PCA Block Diagram

30

Rev. 1.5

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