PIC16F872-E/SS Microchip Technology, PIC16F872-E/SS Datasheet - Page 58

• Manufacturer Part Number: PIC16F872-E/SS
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-E/SS

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SSOP
• Package: 28SSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
3.2.5
DS31003A-page 3-8
Brown-out Reset (BOR)
On-chip Brown-out Reset circuitry places the device into reset when the device voltage falls
below a trip point (BV
side the valid operation range of the device. Brown-out resets are typically used in AC line appli-
cations or large battery applications where large loads may be switched in (such as automotive),
and cause the device voltage to temporarily fall below the specified operating minimum.
The BODEN configuration bit can disable (if clear/programmed) or enable (if set) the Brown-out
Reset circuitry. If V
ifications”
reset is not guaranteed to occur if V
remain in Brown-out Reset until V
and will keep the chip in reset an additional 72 ms. If V
Timer is running, the chip will go back into Reset and the Power-up Timer will be re-initialized.
Once V
shows typical Brown-out situations.
With the BODEN bit set, all voltages below BV
includes during the power-up sequence.
Figure 3-9: Brown-out Situations
Note:
Internal
Internal
Internal
Reset
Reset
Reset
DD
V
V
V
DD
DD
DD
rises above BV
section), for greater than
Before using the on-chip brown-out for a voltage supervisory function (monitor bat-
tery decay), please review the electrical specifications to ensure that they meet your
requirements.
DD
DD
falls below BV
). This ensures that the device does not continue program execution out-
DD
, the Power-up Timer will again start a 72 ms time delay.
DD
DD
DD
rises above BV
parameter
falls below BV
(Typically 4.0V,
<72 ms
35, the brown-out situation will reset the chip. A
DD
72 ms
DD
will hold the device in the reset state. This
DD
DD
parameter D005
. The Power-up Timer will now be invoked
for less than
72 ms
72 ms
drops below BV
1997 Microchip Technology Inc.
parameter
in the
DD
while the Power-up
“Electrical Spec-
35. The chip will
BV
BV
BV
DD
DD
DD
Figure 3-9