PIC16F1947-I/PT Microchip Technology, PIC16F1947-I/PT Datasheet - Page 139

• Manufacturer Part Number: PIC16F1947-I/PT
• Description: IC MCU 8BIT FLASH 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1947-I/PT

• Core Size: 8-Bit
• Program Memory Size: 28KB (16K 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: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 17x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Controller Family/series: PIC16F
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 1024Byte
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Interface: EUSART, I2C, SPI
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: EUSART, I2C, SPI
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 17 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

12.6
PORTE is an 8-bit wide, bidirectional port. The
corresponding data direction register is TRISE. Setting a
TRISE bit (= 1) will make the corresponding PORTE pin
an input (i.e., put the corresponding output driver in a
High-Impedance mode). Clearing a TRISE bit (= 0) will
make the corresponding PORTE pin an output (i.e.,
enable the output driver and put the contents of the
output latch on the selected pin). The exception is RE3,
which is input only and its TRIS bit will always read as
‘1’.
Reading the PORTE register
the status of the pins, whereas writing to it will write to
the
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
(LATE). RE3 reads ‘0’ when MCLRE = 1.
12.6.1
The ANSELE register
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELE 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 ANSELE bits has no affect 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.
The TRISE register
pin output drivers, even when they are being used as
analog inputs. The user should ensure the bits in the
TRISE register are maintained set when using them as
analog inputs. I/O pins configured as analog input always
read ‘0’.
EXAMPLE 12-5:
 2010 Microchip Technology Inc.
BANKSEL PORTE
CLRF
BANKSEL
CLRF
BANKSEL ANSELE
CLRF
BANKSEL TRISE
MOVLW
MOVWF
Note:
Example 12-5
PORT
PORTE Registers
PORTE
ANSELE
B‘00001100’
TRISE
LATE
LATE
ANSELE REGISTER
The ANSELE register must be initialized
to configure an analog channel as a digital
input. Pins configured as analog inputs
will read ‘0’.
latch.
shows how to initialize PORTE.
(Register
INITIALIZING PORTE
All
(Register
;
;Init PORTE
;
;digital I/O
;
;Set RE<3:2> as inputs
;and set RE<1:0>
;as outputs
;Data Latch
;
12-17) controls the PORTE
write
(Register
12-19) is used to
operations
12-16) reads
Preliminary
are
12.6.2
Each PORTE 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.
RE0
1.
2.
RE1
1.
2.
RE2
1.
2.
RE3
1.
2.
RE4
1.
2.
RE5
1.
2.
RE6
1.
2.
RE7
1.
2.
P2D (CCP)
VLCD1 (LCD)
P2C (CCP)
VLCD2 (LCD)
P2B (CCP)
VLCD3 (LCD)
P3C (CCP)
COM0 (LCD)
P3B (CCP)
COM1 (LCD)
P1C (CCP)
COM32(LCD)
P1B (CCP)
COM3 (LCD)
CCP2/P2A (CCP)
SEG31 (LCD)
PIC16F/LF1946/47
PORTE FUNCTIONS AND OUTPUT
PRIORITIES
DS41414B-page 139