PIC16F636-I/ST Microchip Technology, PIC16F636-I/ST Datasheet - Page 128

• Manufacturer Part Number: PIC16F636-I/ST
• Description: IC MCU FLASH 2KX14 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F636-I/ST

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 14-TSSOP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LVD, POR, WDT
• Number Of I /o: 11
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: RS- 232/SPI/USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Package: 14TSSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162057 - MPLAB ICD 2 HEADER 14DIP
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC12F635/PIC16F636/639
REGISTER 12-2:
TABLE 12-8:
DS41232B-page 126
18h
81h
2007h
Legend: Shaded cells are not used by the Watchdog Timer.
Note 1:
Address
(1)
WDTCON
OPTION_REG
CONFIG
bit 7-5
bit 4-1
bit 0
See Register 12-1 for operation of all Configuration Word register bits.
Name
SUMMARY OF WATCHDOG TIMER REGISTERS
WDTCON – WATCHDOG TIMER CONTROL REGISTER (ADDRESS: 18h)
bit 7
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
0101 = 1:1024
0110 = 1:2048
0111 = 1:4096
1000 = 1:8192
1001 = 1:16394
1010 = 1:32768
1011 = 1:65536
1100 = reserved
1101 = reserved
1110 = reserved
1111 = reserved
SWDTEN: Software Enable/Disable for Watchdog Timer bit
1 = WDT is turned on
0 = WDT is turned off
Legend:
R = Readable bit
- n = Value at POR
Note 1: If WDTE configuration bit = 1, then WDT is always enabled, irrespective of this
U-0
—
RAPU
Bit 7
CPD
—
control bit. If WDTE configuration bit = 0, then it is possible to turn WDT on/off with
this control bit.
U-0
—
INTEDG
Bit 6
CP
—
U-0
—
Preliminary
W = Writable bit
‘1’ = Bit is set
MCLRE
T0CS
Bit 5
—
WDTPS3
R/W-0
WDTPS3 WDTPS2 WSTPS1 WDTPS0 SWDTEN
PWRTE
T0SE
Bit 4
WDTPS2
R/W-1
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
WDTE
Bit 3
PSA
WDTPS1
R/W-0
(1)
FOSC2
© 2005 Microchip Technology Inc.
Bit 2
PS2
WDTPS0 SWDTEN
R/W-0
x = Bit is unknown
FOSC1
Bit 1
PS1
R/W-0
FOSC0
Bit 0
PS0
bit 0
(1)