PIC16F873-20/SO Microchip Technology Inc., PIC16F873-20/SO Datasheet - Page 39

• Manufacturer Part Number: PIC16F873-20/SO
• Description: 28 PIN, 7 KB FLASH, 192 RAM, 22 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F873-20/SO

• A/d Inputs: 5-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 22
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SOIC
• Programmable Memory: 7K Bytes
• Ram Size: 192 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

REGISTER 3-1:
2001 Microchip Technology Inc.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
TRISE REGISTER (ADDRESS 89h)
Parallel Slave Port Status/Control Bits:
IBF: Input Buffer Full Status bit
1 = A word has been received and is waiting to be read by the CPU
0 = No word has been received
1 = The output buffer still holds a previously written word
0 = The output buffer has been read
1 = A write occurred when a previously input word has not been read (must be cleared in
0 = No overflow occurred
PSPMODE: Parallel Slave Port Mode Select bit
1 = PORTD functions in Parallel Slave Port mode
0 = PORTD functions in general purpose I/O mode
Unimplemented: Read as '0'
PORTE Data Direction Bits:
Bit2: Direction Control bit for pin RE2/CS/AN7
1 = Input
0 = Output
Bit1: Direction Control bit for pin RE1/WR/AN6
1 = Input
0 = Output
Bit0: Direction Control bit for pin RE0/RD/AN5
1 = Input
0 = Output
bit 7
Legend:
R = Readable bit
- n = Value at POR
OBF: Output Buffer Full Status bit
IBOV: Input Buffer Overflow Detect bit (in Microprocessor mode)
R-0
IBF
software)
OBF
R-0
R/W-0
IBOV
W = Writable bit
’1’ = Bit is set
PSPMODE
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
U-0
—
R/W-1
Bit2
PIC16F87X
x = Bit is unknown
R/W-1
Bit1
DS30292C-page 37
R/W-1
Bit0
bit 0