PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 209

• Manufacturer Part Number: PIC16F946T-I/PT
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F946T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 336 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

REGISTER 16-2:
TABLE 16-8:
© 2005 Microchip Technology Inc.
105h
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 16-1 for operation of all Configuration Word register bits.
Name
SUMMARY OF WATCHDOG TIMER REGISTERS
WDTCON – WATCHDOG TIMER CONTROL REGISTER (ADDRESS: 105h)
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 (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 bit
1 = WDT is turned on
0 = WDT is turned off (Reset value)
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
—
RBPU
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
Bit 2
PS2
PIC16F946
WDTPS0 SWDTEN
x = Bit is unknown
R/W-0
FOSC1
DS41265A-page 207
Bit 1
PS1
FOSC0
R/W-0
Bit 0
PS0
bit 0