PIC16F684-E/P Microchip Technology Inc., PIC16F684-E/P Datasheet - Page 113
PIC16F684-E/P
Manufacturer Part Number
PIC16F684-E/P
Description
14 PIN, 3.5 KB FLASH, 128 RAM, 12 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16F684-EP.pdf
(192 pages)
Specifications of PIC16F684-E/P
A/d Inputs
8-Channel, 10-Bit
Comparators
2
Cpu Speed
5 MIPS
Eeprom Memory
256 Bytes
Input Output
12
Memory Type
Flash
Number Of Bits
8
Package Type
14-pin PDIP
Programmable Memory
3.5K Bytes
Ram Size
128 Bytes
Speed
20 MHz
Timers
2-8-bit, 1-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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REGISTER 12-2:
TABLE 12-8:
© 2006 Microchip Technology Inc.
WDTCON
OPTION_REG
CONFIG
Legend:
Note 1:
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-5
bit 4-1
bit 0
Note 1:
Name
U-0
—
Shaded cells are not used by the Watchdog Timer.
See Register 12-1 for operation of all Configuration Word register bits.
If WDTE Configuration bit = 1, then WDT is always enabled, irrespective of this control bit. If WDTE
Configuration bit = 0, then it is possible to turn WDT on/off with this control bit.
RAPU
Unimplemented: Read as ‘0’
WDTPS<3:0>: Watchdog Timer Period Select bits
Bit Value = Prescale Rate
0000 = 1:32
0001 = 1:64
0010 = 1:128
0011 = 1:256
0100 = 1:512 (Reset value)
0101 = 1:1024
0110 = 1:2048
0111 = 1:4096
1000 = 1:8192
1001 = 1:16384
1010 = 1:32768
1011 = 1:65536
1100 = Reserved
1101 = Reserved
1110 = Reserved
1111 = Reserved
SWDTEN: Software Enable or Disable the Watchdog Timer
1 = WDT is turned on
0 = WDT is turned off (Reset value)
Bit 7
CPD
SUMMARY OF REGISTERS ASSOCIATED WITH WATCHDOG TIMER
—
U-0
—
WDTCON: WATCHDOG TIMER CONTROL REGISTER
INTEDG
Bit 6
CP
—
W = Writable bit
‘1’ = Bit is set
MCLRE
T0CS
Bit 5
U-0
—
—
WDTPS3 WDTPS2 WSTPS1 WDTPS0 SWDTEN ---0 1000
PWRTE
T0SE
Bit 4
WDTPS3
R/W-0
WDTE
Bit 3
PSA
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
WDTPS2
FOSC2
R/W-1
Bit 2
PS2
FOSC1
Bit 1
PS1
(1)
WDTPS1
R/W-0
FOSC0
Bit 0
PS0
x = Bit is unknown
PIC16F684
WDTPS0
1111 1111
POR, BOR
Value on:
R/W-0
—
DS41202D-page 111
---0 1000
1111 1111
SWDTEN
Value on
all other
Resets
R/W-0
—
bit 0
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