C8051F38C-GMR View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

MFG CO.

C8051F38C-GMR

Full Speed USB Flash MCU Family

Silicon Laboratories 

C8051F380/1/2/3/4/5/6/7/C

27.2. PCA0 Interrupt Sources

Figure 27.3 shows a diagram of the PCA interrupt tree. There are six independent event flags that can be

used to generate a PCA0 interrupt. They are: the main PCA counter overflow flag (CF), which is set upon

a 16-bit overflow of the PCA0 counter and the individual flags for each PCA channel (CCF0, CCF1, CCF2,

CCF3, and CCF4), which are set according to the operation mode of that module. These event flags are

always set when the trigger condition occurs. Each of these flags can be individually selected to generate

a PCA0 interrupt, using the corresponding interrupt enable flag (ECF for CF, and ECCFn for each CCFn).

PCA0 interrupts must be globally enabled before any individual interrupt sources are recognized by the

processor. PCA0 interrupts are globally enabled by setting the EA bit and the EPCA0 bit to logic 1.

(for n = 0 to 4)

PCA0CPMn

PECCMT PE

WC A A A O WC

MO P P T GMC

1MPN n n n F

6nnn

n

n

PCA0CN

CC CCCCC

FR CCCCC

FFFFF

43210

PCA0MD

C WW

I DD

DT L

L EC

K

CCCE

PPPC

SSSF

210

PCA Counter/Timer 16-

bit Overflow

PCA Module 0

(CCF0)

PCA Module 1

(CCF1)

PCA Module 2

(CCF2)

PCA Module 3

(CCF2)

PCA Module 4

(CCF2)

ECCF0

ECCF1

ECCF2

ECCF3

ECCF4

0

1

0

1

0

1

0

1

0

1

0

1

EPCA0

Figure 27.3. PCA Interrupt Block Diagram

EA

0

1

0 Interrupt

Priority

1

Decoder

300

Rev. 1.4

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