PIC16F1937-E/MV Microchip Technology, PIC16F1937-E/MV Datasheet - Page 132

• 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
12.2
PORTA is a 8-bit wide, bidirectional port. The
corresponding data direction register is TRISA
(Register
corresponding PORTA pin an input (i.e., disable the
output driver). Clearing a TRISA bit (= 0) will make the
corresponding PORTA pin an output (i.e., enables
output driver and puts the contents of the output latch
on the selected pin).
initialize an I/O port.
Reading the PORTA 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 (LATA).
The TRISA register
PORTA pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits
in the TRISA register are maintained set when using
them as analog inputs. I/O pins configured as analog
input always read ‘0’.
12.2.1
The ANSELA register
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELA 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 ANSELA 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 132
Note:
PORTA Registers
12-3). Setting a TRISA bit (= 1) will make the
ANSELA REGISTER
The ANSELA 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.
Example 12-1
(Register
(Register
(Register
12-3) controls the
12-5) is used to
12-2) reads the
shows how to
12.2.2
Each PORTA 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 functions, such as ADC, comparator and
CapSense inputs, are not shown in the priority lists.
These inputs are active when the I/O pin is set for
Analog mode using the ANSELx registers. Digital
output functions may control the pin when it is in Analog
mode with the priority shown in
TABLE 12-2:
Pin Name
Note 1:
RA0
RA1
RA2
RA3
RA4
RA5
RA6
RA7
Priority listed from highest to lowest.
PORTA FUNCTIONS AND OUTPUT
PRIORITIES
V
OSC2 (enabled by Config. Word)
CLKOUT (enabled by Config. Word)
SEG1 (LCD)
RA6
OSC1/CLKIN (enabled by Config. Word)
SEG2 (LCD)
RA7
Table
V
SEG12 (LCD)
SRNQ (SR Latch)
C2OUT (Comparator)
RA0
SEG7 (LCD)
RA1
COM2 (LCD)
AN2 (DAC)
RA2
COM3 (LCD) 28-pin only
SEG15
RA3
SEG4 (LCD)
SRQ (SR Latch)
C1OUT (Comparator)
CCP5, 28-pin only
RA4
V
SEG5 (LCD)
SRNQ (SR Latch)
C2OUT (Comparator)
RA5
CAP
CAP
CAP
PORTA OUTPUT PRIORITY
(enabled by Config. Word)
 2008-2011 Microchip Technology Inc.
(enabled by Config. Word)
12-2.
Function Priority
Table
12-2.
(1)