PIC16HV540 Microchip Technology, PIC16HV540 Datasheet - Page 40

• Manufacturer Part Number: PIC16HV540
• Description: Enhanced PIC16C54 EPROM-Based 8-Bit CMOS Microcontroller
• Manufacturer: Microchip Technology

PIC16HV540
voltage may approach the maximum value. Again this
condition should be considered when interfacing to
external circuitry.
In addition, the voltage level applied to the external V
pin and operational temperature affects the internal
regulation voltage.
FIGURE 7-12: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 7-6:
DS40197B-page 40
Legend:
Address
N/A
N/A
Shaded boxes = Not used by Watchdog Timer, — = unimplemented, read as '0', u = unchanged, x = unknown.
OPTION2
OPTION
Name
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
WDTEN
Configuration
bit
Bit 7
—
—
Watchdog
Timer
Bit 6
—
—
Note: T0CS, T0SE, PSA, PS<2:0>
SWDTEN bit
PCWU SWDTEN
T0CS
Bit 5
From TMR0 Clock Source
are bits in the OPTION register.
T0SE
Bit 4
0
1
Bit 3
PSA
RL
Preliminary
DD
PSA
M
U
X
Bit 2
PS2
SL
BODL
Bit 1
PS1
0
BODEN
Time-out
Bit 0
PS0
8 - to - 1 MUX
MUX
WDT
Postscaler
Postscaler
--11 1111 --11 1111 --11 1111 --11 1111
Power-On
--UU UUU --uu uuuu --uu uuuu --xx xxxx
1
Value on
Reset
PSA
To TMR0
WDT Reset
MCLR and
Value on
2000 Microchip Technology Inc.
PS<2:0>
Value on
Wake-up
Change
on Pin
Brown-out
Value on
Reset