PIC16F872-I/SS Microchip Technology, PIC16F872-I/SS Datasheet - Page 143

• Manufacturer Part Number: PIC16F872-I/SS
• Description: IC MCU FLASH 2KX14 EE 28SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-I/SS

• Core Size: 8-Bit
• Program Memory Size: 3.5KB (2K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• 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 ~ 85°C
• Package / Case: 28-SSOP
• Controller Family/series: PIC16F
• No. Of I/o's: 22
• Eeprom Memory Size: 64Byte
• Ram Memory Size: 128Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: I2C, SPI, SSP
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3 bit
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164307 - MODULE SKT FOR PM3 28SSOPAC164020 - MODULE SKT PROMATEII 44TQFPXLT28SS-1 - SOCKET TRANSITION ICE 28SSOP
• Lead Free Status / Rohs Status: Details

1997 Microchip Technology Inc.
When peripheral functions are multiplexed onto general I/O pins, the functionality of the I/O pins
may change to accommodate the requirements of the peripheral module. Examples of this are
the Analog-to-Digital (A/D) converter and LCD driver modules, which force the I/O pin to the
peripheral function when the device is reset. In the case of the A/D, this prevents the device from
consuming excess current if any analog levels were on the A/D pins after a reset occurred.
With some peripherals, the TRIS bit is overridden while the peripheral is enabled. Therefore,
read-modify-write instructions (BSF, BCF, XORWF) with TRIS as destination should be avoided.
The user should refer to the corresponding peripheral section for the correct TRIS bit settings.
PORT pins may be multiplexed with analog inputs and analog V
of these pins is selected, to be an analog input or digital I/O, by clearing/setting the control bits
in the ADCON1 register (A/D Control Register1). When selected as an analog input, these pins
will read as ‘0’s.
The TRIS registers control the direction of the port pins, even when they are being used as ana-
log inputs. The user must ensure the TRIS bits are maintained set when using the pins as analog
inputs.
Note 1: If pins are multiplexed with Analog inputs, then on a Power-on Reset these pins are
Note 2: If pins are multiplexed with comparator inputs, then on a Power-on Reset these pins
Note 3: If pins are multiplexed with LCD driver segments, then on a Power-on Reset these
Note 4: Pins may be multiplexed with the Parallel Slave Port (PSP). For the PSP to function,
Note 5: At present the Parallel Slave Port (PSP) is only multiplexed onto PORTD and
configured as analog inputs, as controlled by the ADCON1 register. Reading port
pins configured as analog inputs read a ‘0’.
are configured as analog inputs, as controlled by the CMCON register. Reading port
pins configured as analog inputs read a ‘0’.
pins are configured as LCD driver segments, as controlled by the LCDSE register.
To configure the pins as a digital port, the corresponding bits in the LCDSE register
must be cleared. Any bit set in the LCDSE register overrides any bit settings in the
corresponding TRIS register.
the I/O pins must be configured as digital inputs and the PSPMODE bit must be set.
PORTE. The microprocessor port becomes enabled when the PSPMODE bit is set.
In this mode, the user must make sure that the TRISE bits are set (pins are config-
ured as digital inputs) and that PORTE is configured for digital I/O. PORTD will over-
ride the values in the TRISD register. In this mode the PORTD and PORTE input
buffers are TTL. The control bits for the PSP operation are located in TRISE.
Section 9. I/O Ports
REF
input. The operation of each
DS31009A-page 9-3
9