C8051F007 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

MFG CO.

C8051F007

Mixed-Signal 32KB ISP FLASH MCU Family

Silicon Laboratories 

C8051F000/1/2/5/6/7

C8051F010/1/2/5/6/7

20.1. Capture/Compare Modules

Each module can be configured to operate independently in one of four operation modes: Edge-triggered Capture,

Software Timer, High Speed Output, or Pulse Width Modulator. Each module has Special Function Registers

(SFRs) associated with it in the CIP-51 system controller. These registers are used to exchange data with a module

and configure the module’s mode of operation.

Table 20.1 summarizes the bit settings in the PCA0CPMn registers used to place the PCA capture/compare modules

into different operating modes. Setting the ECCFn bit in a PCA0CPMn register enables the module’s CCFn

interrupt. Note: PCA0 interrupts must be globally enabled before individual CCFn interrupts are recognized. PCA0

interrupts are globally enabled by setting the EA bit (IE.7) and the EPCA0 bit (EIE1.3) to logic 1. See Figure 20.2

for details on the PCA interrupt configuration.

Table 20.1. PCA0CPM Register Settings for PCA Capture/Compare Modules

ECOM CAPP

X

1

CAPN

0

MAT

0

X

0

1

0

X

1

1

0

1

0

0

1

1

0

0

1

1

0

0

X

X = Don’t Care

TOG

0

0

0

0

1

0

PWM

0

0

0

0

0

1

ECCF

X

X

X

X

X

X

Operation Mode

Capture triggered by positive edge on

CEXn

Capture triggered by negative edge on

CEXn

Capture triggered by transition on CEXn

Software Timer

High Speed Output

Pulse Width Modulator

Figure 20.2. PCA Interrupt Block Diagram

(for n = 0 to 4)

PCA0CPMn

ECCMT P E

CA A AOWC

OPP TGMC

MPN n n n F

nnn

n

PCA0CN

CC CCCCC

FR CCCCC

FFFFF

43210

PCA0MD

C

CCE

I

PPC

D

SSF

L

10

PCA Counter/

0

Timer Overflow

1

PCA Module 0

PCA Module 1

PCA Module 2

PCA Module 3

PCA Module 4

ECCF0

0

1

ECCF1

0

1

ECCF2

0

1

ECCF3

0

1

ECCF4

0

1

EPCA0

(EIE1.3)

EA

(IE.7)

0

1

0 Interrupt

Priority

1

Decoder

155

Rev. 1.7

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