PIC16F690T-ESS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F690T-ESS

20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F631/677/685/687/689/690

FIGURE 3-9:

FSCM TIMING DIAGRAM

Sample Clock

System

Clock

Output

Clock Monitor Output

(Q)

OSCFIF

Oscillator

Failure

Failure

Detected

Note:

Test

Test

Test

The system clock is normally at a much higher frequency than the sample clock. The relative frequencies in

this example have been chosen for clarity.

TABLE 3-2: SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR, BOR

Value on

all other

Resets(1)

CONFIG(2)

CPD

CP MCLRE PWRTE WDTE FOSC2 FOSC1 FOSC0

—

—

OSCCON

—

IRCF2 IRCF1 IRCF0 OSTS HTS

LTS

SCS -110 x000 -110 x000

OSCTUNE

—

—

—

TUN4 TUN3 TUN2 TUN1 TUN0 ---0 0000 ---u uuuu

PIE1

—

ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE -000 0000 -000 0000

PIR1

—

ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF -000 0000 -000 0000

Legend:

Note 1:

2:

x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by oscillators.

Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation.

See Configuration Word register (Register 14-1) for operation of all register bits.

DS41262E-page 58

© 2008 Microchip Technology Inc.

Share Link: