PIC16F877A-I/PT Microchip Technology Inc., PIC16F877A-I/PT Datasheet - Page 32

• Manufacturer Part Number: PIC16F877A-I/PT
• Description: 44 PIN, 7 KB FLASH, 368 RAM, 33 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F877A-I/PT

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 33
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• 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

PIC16F87X
TABLE 3-1:
TABLE 3-2:
DS30292C-page 30
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3/V
RA4/T0CKI
RA5/SS/AN4
Legend: TTL = TTL input, ST = Schmitt Trigger input
Address
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
Note:
9Fh
05h
85h
Name
Shaded cells are not used by PORTA.
When using the SSP module in SPI Slave mode and SS enabled, the A/D converter must be set to one of
the following modes, where PCFG3:PCFG0 = 0100,0101, 011x, 1101, 1110, 1111.
PORTA
TRISA
ADCON1 ADFM
REF
Name
PORTA FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Bit#
bit0
bit1
bit2
bit3
bit4
bit5
Bit 7
—
—
Buffer
TTL
TTL
TTL
TTL
TTL
Bit 6
ST
—
—
—
PORTA Data Direction Register
Input/output or analog input.
Input/output or analog input.
Input/output or analog input.
Input/output or analog input or V
Input/output or external clock input for Timer0. Output is open drain type.
Input/output or slave select input for synchronous serial port or analog input.
Bit 5
RA5
—
Bit 4
RA4
—
PCFG3 PCFG2 PCFG1 PCFG0
Bit 3
RA3
Bit 2
RA2
REF.
Function
Bit 1
RA1
Bit 0
RA0
2001 Microchip Technology Inc.
--0x 0000
--11 1111
--0- 0000
Value on:
POR,
BOR
Value on all
--0u 0000
--11 1111
--0- 0000
RESETS
other