PIC12LF1840-E/SN Microchip Technology, PIC12LF1840-E/SN Datasheet - Page 113
![7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core, Nano](/photos/16/3/160347/soic8_sml.jpg)
PIC12LF1840-E/SN
Manufacturer Part Number
PIC12LF1840-E/SN
Description
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core, Nano
Manufacturer
Microchip Technology
Series
PIC® XLP™ 12Fr
Datasheet
1.PIC12F1840-EMF.pdf
(382 pages)
Specifications of PIC12LF1840-E/SN
Processor Series
PIC12F
Core
PIC
Program Memory Type
Flash
Program Memory Size
7 KB
Data Ram Size
256 B
Interface Type
MI2C, SPI, EUSART
Number Of Timers
3
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8
Development Tools By Supplier
MPLAB IDE Software
Minimum Operating Temperature
- 40 C
Core Processor
RISC
Core Size
8-Bit
Speed
32MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
5
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Lead Free Status / Rohs Status
Details
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
PIC12LF1840-E/SN
Manufacturer:
MICRON
Quantity:
4 500
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12.2
PORTA is a 6-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). The exception is RA3, which is
input only and its TRIS bit will always read as ‘1’.
Example 12-1
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 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.
EXAMPLE 12-1:
2011 Microchip Technology Inc.
BANKSEL
CLRF
BANKSEL
CLRF
BANKSEL
CLRF
BANKSEL
MOVLW
MOVWF
Note:
PORTA Registers
12-3). Setting a TRISA bit (= 1) will make the
ANSELA REGISTER
PORTA
PORTA
LATA
LATA
ANSELA
ANSELA
TRISA
B'00111000' ;Set RA<5:3> as inputs
TRISA
The ANSELA register must be initialized
to configure an analog channel as a digital
input. Pins configured as analog inputs
will read ‘0’.
shows how to initialize PORTA.
INITIALIZING PORTA
(Register
(Register
;
;Init PORTA
;Data Latch
;
;
;digital I/O
;
;and set RA<2:0> as
;outputs
(Register
12-3) controls the
12-5) is used to
12-2) reads the
Preliminary
PIC12(L)F1840
DS41441B-page 113
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