PIC16F1946-E/PT Microchip Technology, PIC16F1946-E/PT Datasheet - Page 128

• Manufacturer Part Number: PIC16F1946-E/PT
• Description: MCU 8BIT 8K FLASH 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1946-E/PT

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 17x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-TFQFP
• Controller Family/series: PIC16F
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Interface: EUSART, I2C, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F/LF1946/47
12.3
PORTB is an 8-bit wide, bidirectional port. The
corresponding
(Register 12-7). Setting a TRISB bit (= 1) will make the
corresponding PORTB pin an input (i.e., put the
corresponding output driver in a High-Impedance mode).
Clearing a TRISB bit (= 0) will make the corresponding
PORTB pin an output (i.e., enable the output driver and
put the contents of the output latch on the selected pin).
Example 12-2 shows how to initialize PORTB.
Reading the PORTB register (Register 12-6) 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 (LATB).
The TRISB register (Register 12-7) controls the PORTB
pin output drivers, even when they are being used as
analog inputs. The user should ensure the bits in the
TRISB register are maintained set when using them as
analog inputs. I/O pins configured as analog input always
read ‘0’.
12.3.1
Each of the PORTB pins has an individually configurable
internal weak pull-up. Control bits WPUB<7:0> enable or
disable each pull-up (see Register 12-9). Each weak
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.
12.3.2
All of the PORTB pins are individually configurable as
an interrupt-on-change pin. Control bits IOCB<7:0>
enable or disable the interrupt function for each pin.
The interrupt-on-change feature is disabled on a
Power-on
“Interrupt-On-Change” for more information.
EXAMPLE 12-2:
DS41414A-page 126
BANKSEL
CLRF
BANKSEL
CLRF
BANKSEL
MOVLW
MOVWF
PORTB Registers
PORTDB;
PORTB
LATDB
LATB
TRISD
B'11110000' ;Set RD<7:4> as inputs
TRISD
WEAK PULL-UPS
INTERRUPT-ON-CHANGE
Reset.
data
INITIALIZING PORTB
direction
Reference
;Init PORTD
;Data Latch
;
;
;and set RD<3:0> as
;outputs
register
Section 13.0
is
TRISB
Preliminary
12.3.3
Each PORTB pin is multiplexed with other functions. The
pins, their combined functions and their output priorities
are briefly described here. For additional information,
refer to the appropriate section in this data sheet.
When multiple outputs are enabled, the actual pin
control goes to the peripheral with the lowest number in
the following lists.
Analog input and some digital input functions are not
included in the list below. These input functions can
remain active when the pin is configured as an output.
Certain digital input functions, such as the EUSART RX
signal, override other port functions and are included in
the priority list.
RB0
1.
2.
3.
4.
RB1
1.
RB2
1.
RB3
1.
RB4
1.
RB5
1.
2.
RB6
1.
2.
3.
RB7
1.
2.
3.
SEG30 (LCD)
FLT0 (CCP)
SRI (SR Latch)
INT
SEG8 (LCD)
SEG9 (LCD)
SEG10 (LCD)
SEG11 (LCD)
SEG29 (LCD)
T1G (TMR1)
ICSPCLK (Programming)
ICDCLK (enabled by Configuration Word)
SEG38 (LCD)
ICSPDAT (Programming)
ICDDAT (enabled by Configuration Word)
SEG39 (LCD)
PORTB FUNCTIONS AND OUTPUT
PRIORITIES
 2010 Microchip Technology Inc.