PIC16F887-I/PT Microchip Technology Inc., PIC16F887-I/PT Datasheet - Page 55

• Manufacturer Part Number: PIC16F887-I/PT
• Description: MCU, 8-Bit, 8KW Flash, 368 RAM, 36 I/O, TQFP-44
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F887-I/PT

• A/d Inputs: 14-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 35
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TFQP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• Resistance, Drain To Source On: Bytes
• Serial Interface: MSSP or EUSART
• 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

3.5
PORTC is a 8-bit wide, bidirectional port. The
corresponding
(Register 3-10). Setting a TRISC bit (= 1) will make the
corresponding PORTC pin an input (i.e., put the
corresponding output driver in a High-Impedance mode).
Clearing a TRISC bit (= 0) will make the corresponding
PORTC pin an output (i.e., enable the output driver and
put the contents of the output latch on the selected pin).
Example 3-4 shows how to initialize PORTC.
Reading the PORTC register (Register 3-9) reads the
status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then written
to the PORT data latch.
REGISTER 3-9:
REGISTER 3-10:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
Note 1:
TRISC7
R/W-1
R/W-x
RC7
PORTC and TRISC Registers
TRISC<1:0> always reads ‘1’ in LP Oscillator mode.
data
RC<7:0>: PORTC General Purpose I/O Pin bit
1 = Port pin is > V
0 = Port pin is < V
TRISC<7:0>: PORTC Tri-State Control bit
1 = PORTC pin configured as an input (tri-stated)
0 = PORTC pin configured as an output
TRISC6
R/W-1
R/W-x
RC6
PORTC: PORTC REGISTER
TRISC: PORTC TRI-STATE REGISTER
direction
W = Writable bit
‘1’ = Bit is set
W = Writable bit
‘1’ = Bit is set
TRISC5
register
IH
IL
R/W-1
R/W-x
RC5
is
PIC16F882/883/884/886/887
TRISC
TRISC4
R/W-1
R/W-x
RC4
Preliminary
U = Unimplemented bit, read as ‘0’
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
‘0’ = Bit is cleared
TRISC3
R/W-x
R/W-1
The TRISC register (Register 3-10) controls the PORTC
pin output drivers, even when they are being used as
analog inputs. The user should ensure the bits in the
TRISC register are maintained set when using them as
analog inputs. I/O pins configured as analog input always
read ‘0’.
EXAMPLE 3-4:
RC3
BANKSEL PORTC
CLRF
BANKSEL TRISC
MOVLW
MOVWF
PORTC
B‘00001100’
TRISC
TRISC2
R/W-x
R/W-1
RC2
INITIALIZING PORTC
;
;Init PORTC
;
;Set RC<3:2> as inputs
;and set RC<7:4,1:0>
;as outputs
x = Bit is unknown
x = Bit is unknown
R/W-1
TRISC1
R/W-x
RC1
(1)
DS41291D-page 53
R/W-1
TRISC0
R/W-x
RC0
(1)
bit 0
bit 0