PIC16F1937-E/MV Microchip Technology, PIC16F1937-E/MV Datasheet - Page 144

• Manufacturer Part Number: PIC16F1937-E/MV
• Description: 14KB Flash, 512B RAM, 256B EEPROM, LCD, 1.8-5.5V 40 UQFN 5x5x0.5mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1937-E/MV

• Processor Series: PIC16F
• Core: PIC
• Program Memory Type: Flash
• Program Memory Size: 14 KB
• Data Ram Size: 256 B
• Interface Type: MI2C, SPI, EUSART
• Number Of Timers: 5
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: UQFN-40
• Development Tools By Supplier: MPLAB IDE Software
• Minimum Operating Temperature: - 40 C
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 36
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Lead Free Status / Rohs Status: Details

PIC16(L)F1934/6/7
12.5
PORTD is a 8-bit wide, bidirectional port. The
corresponding
(Register
corresponding PORTD pin an input (i.e., put the
corresponding output driver in a High-Impedance mode).
Clearing a TRISD bit (= 0) will make the corresponding
PORTD pin an output (i.e., enable the output driver and
put the contents of the output latch on the selected pin).
Example 12-1
Reading the PORTD 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 (LATD).
The TRISD register
PORTD pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits
in the TRISD register are maintained set when using
them as analog inputs. I/O pins configured as analog
input always read ‘0’.
12.5.1
The ANSELD register
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELD 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 ANSELD bits has no effect on digital
output functions. A pin with TRIS clear and ANSEL set
will still operate as a digital output, but the Input mode
will be analog. This can cause unexpected behavior
when executing read-modify-write instructions on the
affected port.
DS41364E-page 144
Note:
Note:
PORTD Registers
12-14). Setting a TRISD bit (= 1) will make the
PORTD is available on PIC16(L)F1934
and PIC16(L)F1937 only.
ANSELD REGISTER
The ANSELD bits default to the Analog
mode after Reset. To use any pins as
digital general purpose or peripheral
inputs, the corresponding ANSEL bits
must be initialized to ‘0’ by user software.
shows how to initialize an I/O port.
data
direction
(Register
(Register
(Register
12-15) controls the
register
12-17) is used to
12-14) reads the
is
TRISD
12.5.2
Each PORTD pin is multiplexed with other functions. The
pins, their combined functions and their output priorities
are shown in
When multiple outputs are enabled, the actual pin
control goes to the peripheral with the highest priority.
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 override other port
functions and are included in
TABLE 12-9:
Note 1:
Pin Name
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
Priority listed from highest to lowest.
PORTD FUNCTIONS AND OUTPUT
PRIORITIES
Table
PORTD OUTPUT PRIORITY
 2008-2011 Microchip Technology Inc.
COM3 (LCD)
RD0
CCP4 (CCP)
RD1
P2B (CCP)
RD2
SEG16 (LCD)
P2C (CCP)
RD3
SEG17 (LCD)
P2D (CCP)
RD4
SEG18 (LCD)
P1B (CCP)
RD5
SEG19 (LCD)
P1C (CCP)
RD6
SEG20 (LCD)
P1D (CCP)
RD7
12-9.
Function Priority
Table
12-9.
(1)