PIC16F721T-I/ML Microchip Technology, PIC16F721T-I/ML Datasheet - Page 62

• Manufacturer Part Number: PIC16F721T-I/ML
• Description: 7 KB FLASH, 256 B SRAM, 18 I/O 20 QFN 4x4mm T/R
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721T-I/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F/LF720/721
6.3
PORTC is a 8-bit wide, bidirectional port. The
corresponding
(Register
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 6-3
Reading the PORTC register
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 6-11:
DS41430A-page 62
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-x
RC7
PORTC and TRISC Registers
6-12). Setting a TRISC bit (= 1) will make the
shows how to initialize PORTC.
data
RC<7:0>: PORTC General Purpose I/O Pin bits
1 = Port pin is > V
0 = Port pin is < V
R/W-x
RC6
PORTC: PORTC REGISTER
direction
(Register
W = Writable bit
‘1’ = Bit is set
register
R/W-x
IH
IL
RC5
6-11) reads the
is
TRISC
R/W-x
RC4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-x
The TRISC register
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 6-3:
6.3.1
The ANSELC register
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELC bit high will cause all
digital reads on the pin to be read as ‘0’ and allow
analog functions on the pin to operate correctly.
The state of the ANSELC bits has no effect on digital
output functions. A pin with TRIS clear and ANSELC
set will still operate as a digital output, but the Input
mode will be analog. This can cause unexpected
behavior
instructions on the affected port.
RC3
BANKSEL PORTC
CLRF
BANKSEL TRISC
MOVLW
MOVWF
PORTC
B‘00001100’
TRISC
ANSELC REGISTER
when
R/W-x
RC2
(Register
INITIALIZING PORTC
executing
 2010 Microchip Technology Inc.
;
;Init PORTC
;
;Set RC<3:2> as inputs
;and set RC<7:4,1:0>
;as outputs
(Register
x = Bit is unknown
6-12) controls the PORTC
R/W-x
RC1
6-13) is used to
read-modify-write
R/W-x
RC0
bit 0