PIC16F1824-I/P Microchip Technology, PIC16F1824-I/P Datasheet - Page 135

• Manufacturer Part Number: PIC16F1824-I/P
• Description: IC PIC MCU 8BIT 14KB FLSH 14PDIP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1824-I/P

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 11
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-DIP (0.300", 7.62mm)
• Processor Series: PIC16F
• Core: PIC
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

12.4
PORTC is a 6-bit wide (8-bit wide for PIC16F/LF1828),
bidirectional port. The corresponding data direction
register is TRISC
(= 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).
how to initialize PORTC.
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 (LATC).
The TRISC register
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’.
The INLVLC register
voltage threshold for each of the available PORTC
input pins. A selection between the Schmitt Trigger
CMOS or the TTL Compatible thresholds is available.
The input threshold is important in determining the
value of a read of the PORTC register and also the
level at which an Interrupt-on-Change occurs, if that
feature is enabled. See
istics: PIC16F/LF1824/1828-I/E”
on threshold levels.
12.4.1
Each of the PORTC pins has an individually configurable
internal weak pull-up. Control bits WPUC<7:0> enable or
disable each pull-up (see
pull-up is automatically turned off when the port pin is
configured as an output. All pull-ups are disabled on a
Power-on Reset by the WPUEN bit of the OPTION
register.
 2010 Microchip Technology Inc.
Note:
PORTC Registers
Changing the input threshold selection
should be performed while all peripheral
modules are disabled. Changing the
threshold level during the time a module is
active may inadvertently generate a tran-
sition associated with an input pin, regard-
less of the actual voltage level on that pin.
WEAK PULL-UPS
(Register
(Register
(Register
Section 30.4 “DC Character-
Register
12-10). Setting a TRISC bit
(Register
12-14) controls the input
12-10) controls the
Example 12-2
for more information
12-19). Each weak
12-9) reads the
shows
Preliminary
12.4.2
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 affect on digital out-
put 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 when exe-
cuting read-modify-write instructions on the affected
port.
EXAMPLE 12-3:
BANKSEL PORTC
CLRF
BANKSEL LATC
CLRF
BANKSEL ANSELC
CLRF
BANKSEL TRISB
MOVLW
MOVWF
Note:
PIC16(L)F1824/1828
PORTC
LATC
ANSELC
B’00110000’;Set RC<5:4> as inputs
TRISC
ANSELC REGISTER
The ANSELC register must be initialized
to configure an analog channel as a digital
input. Pins configured as analog inputs
will read ‘0’.
INITIALIZING PORTC
;
;Init PORTC
;Data Latch
;
;Make RC<5:0> digital
;
;and RC<3:0> as outputs
;
(Register
12-12) is used to
DS41419B-page 135