PIC16F721-E/SO Microchip Technology, PIC16F721-E/SO Datasheet - Page 30

• Manufacturer Part Number: PIC16F721-E/SO
• Description: 7 KB FLASH, 256 B SRAM, 18 I/O 20 SOIC .300in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F/LF720/721
3.4.2
The WDTE bit is located in the Configuration Word
Register 1. When set, the WDT runs continuously.
The PSA and PS<2:0> bits of the OPTION register
control the WDT period. See
Module”
FIGURE 3-1:
TABLE 3-3:
DS41430A-page 30
WDTE = 0
CLRWDT Command
Exit Sleep + System Clock = INTOSC, EXTCLK
T1GSS = 11
TMR1GE
WDTE
for more information.
WDT CONTROL
WDT STATUS
WATCHDOG TIMER BLOCK DIAGRAM
Section 12.0 “Timer0
Conditions
Low-Power
WDT OSC
Divide by
512
PSA
Clock Source
From TMR0
0
1
0
To T1G
Postscaler
 2010 Microchip Technology Inc.
WDTE
1
8
Cleared
WDT
TO TMR0
PS<2:0>
WDT Reset