Datasheet

PIC17C4X
DS30412C-page 104  1996 Microchip Technology Inc.
FIGURE 14-8: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 14-4: REGISTERS/BITS ASSOCIATED WITH THE WATCHDOG TIMER
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-on
Reset
Value on all
other resets
(Note1)
— Config
— PM1 — PM0 WDTPS1 WDTPS0 FOSC1 FOSC0 (Note 2) (Note 2)
06h, Unbanked CPUSTA — — STKAV GLINTD TO PD — — --11 11-- --11 qq--
Legend: - = unimplemented read as '0', q - value depends on condition, shaded cells are not used by the WDT.
Note 1: Other (non power-up) resets include: external reset through MCLR
and Watchdog Timer Reset.
2: This value will be as the device was programmed, or if unprogrammed, will read as all '1's.
WDT
WDT Enable
Postscaler
4 - to - 1 MUX
WDTPS1:WDTPS0
On-chip RC
WDT Overflow
Oscillator
(1)
Note 1: This oscillator is separate from the external
RC oscillator on the OSC1 pin.