PIC12F510_13 Datasheet, PDF (69/124 Pages) Microchip Technology – 8/14-Pin, 8-Bit Flash Microcontrollers

PIC12F510/16F506
FIGURE 10-11:
WATCHDOG TIMER BLOCK DIAGRAM
From Timer0 Clock Source
(Figure 6-5)
Watchdog
Timer
0
M
1_U
X
Postscaler
WDTE
PSA
8-to-1 MUX
PS<2:0>
To Timer0 (Figure 6-4)
0
1
MUX
PSA
WDT Time-out
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
TABLE 10-7: SUMMARY OF REGISTERS 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
N/A
OPTION⁽¹⁾ GPWU GPPU T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
N/A
OPTION⁽²⁾ RBWU RBPU T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
Legend: Shaded boxes = Not used by Watchdog Timer. – = unimplemented, read as ‘0’, u = unchanged.
Note 1: PIC12F510 only.
2: PIC16F506 only.
© 2007 Microchip Technology Inc.
DS41268D-page 67