PIC18F2331-E/MM Microchip Technology, PIC18F2331-E/MM Datasheet - Page 275

• Manufacturer Part Number: PIC18F2331-E/MM
• Description: IC MCU FLASH 4KX16 28QFN
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2331-E/MM

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-QFN
• Core: PIC
• Processor Series: PIC18F
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Data Ram Size: 768 B
• Data Rom Size: 256 B
• On-chip Adc: Yes
• Number Of Programmable I/os: 24
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 5.5 V
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 5
• Height: 0.88 mm
• Interface Type: EUSART, I2C, SPI, SSP
• Length: 6 mm
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V, 5.8 V
• Supply Voltage (min): 3.9 V, 4.2 V
• Width: 6 mm
• For Use With: I3-DB18F4431 - BOARD DAUGHTER ICEPIC3
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: PIC18F2331-E/ML; PIC18F2331-E/ML

REGISTER 23-15: WDTCON: WATCHDOG TIMER CONTROL REGISTER
TABLE 23-2:
 2010 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-1
bit 0
Note 1:
CONFIG2H
RCON
WDTCON
Legend: Shaded cells are not used by the Watchdog Timer.
WDTW
Name
R-0
If the WDTEN Configuration bit = 1, then WDT is always enabled, irrespective of this control bit. If WDTEN
Configuration bit = 0, then it is possible to turn WDT on/off with this control bit.
WDTW: Watchdog Timer Window bit
1 = WDT count is in fourth quadrant
0 = WDT count is not in fourth quadrant
Unimplemented: Read as ‘0’
SWDTEN: Software Enable/Disable for Watchdog Timer bit
1 = WDT is turned on
0 = WDT is turned off
SUMMARY OF WATCHDOG TIMER REGISTERS
WDTW
IPEN
Bit 7
U-0
—
—
W = Writable bit
‘1’ = Bit is set
Bit 6
—
—
—
U-0
—
WINEN
PIC18F2331/2431/4331/4431
Bit 5
—
—
U-0
—
WDTPS3
Bit 4
RI
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U-0
—
WDTPS2
Bit 3
TO
—
(1)
U-0
—
WDTPS2
Bit 2
PD
—
x = Bit is unknown
U-0
WDTPS0
—
Bit 1
POR
—
DS39616D-page 275
SWDTEN
SWDTEN
R/W-0
WDTEN
Bit 0
BOR
bit 0
(1)