PIC16F887-I/PT Microchip Technology Inc., PIC16F887-I/PT Datasheet - Page 223

• Manufacturer Part Number: PIC16F887-I/PT
• Description: MCU, 8-Bit, 8KW Flash, 368 RAM, 36 I/O, TQFP-44
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F887-I/PT

• A/d Inputs: 14-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 35
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TFQP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• Resistance, Drain To Source On: Bytes
• Serial Interface: MSSP or EUSART
• 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

REGISTER 14-3:
TABLE 14-8:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-5
bit 4-1
bit 0
CONFIG1
OPTION_REG
WDTCON
Legend:
Note 1:
Note 1: If WDTE configuration bit = 1, then WDT is always enabled, irrespective of this control bit. If WDTE
Name
U-0
—
(1)
Shaded cells are not used by the Watchdog Timer.
See Register 14-1 for operation of all Configuration Word Register 1 bits.
Configuration bit = 0, then it is possible to turn WDT on/off with this control bit.
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)
RBPU
Bit 7
CPD
SUMMARY OF WATCHDOG TIMER REGISTER
—
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
PIC16F882/883/884/886/887
WDTPS3
R/W-0
Preliminary
WDTE
Bit 3
PSA
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
WDTPS2
R/W-1
FOSC2
Bit 2
PS2
FOSC1
Bit 1
PS1
(1)
WDTPS1
R/W-0
FOSC0
Bit 0
PS0
x = Bit is unknown
WDTPS0
R/W-0
1111 1111
POR, BOR
Value on
—
DS41291D-page 221
SWDTEN
1111 1111
---0 1000
R/W-0
Value on
all other
Resets
—
bit 0
(1)