PIC16F684-I/SL Microchip Technology, PIC16F684-I/SL Datasheet - Page 33
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PIC16F684-I/SL
Manufacturer Part Number
PIC16F684-I/SL
Description
IC PIC MCU FLASH 2KX14 14SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F684-ISL.pdf
(4 pages)
4.PIC16F684-ISL.pdf
(192 pages)
5.PIC16F684-ISL.pdf
(6 pages)
6.PIC16F684-IST.pdf
(164 pages)
Specifications of PIC16F684-I/SL
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
12
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
3
Operating Supply Voltage
2 V to 5.5 V
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, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Package
14SOIC N
Device Core
PIC
Family Name
PIC16
Maximum Speed
20 MHz
Data Rom Size
256 B
Height
1.25 mm
Length
8.65 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2 V
Width
3.9 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Connectivity
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
PIC16F684-I/SLG
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F684-I/SL
Manufacturer:
MXIC
Quantity:
1 500
Company:
Part Number:
PIC16F684-I/SL
Manufacturer:
Microchip Technology
Quantity:
32 570
Part Number:
PIC16F684-I/SL
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
4.0
There are as many as twelve general purpose I/O pins
available. Depending on which peripherals are
enabled, some or all of the pins may not be available as
general purpose I/O. In general, when a peripheral is
enabled, the associated pin may not be used as a
general purpose I/O pin.
4.1
PORTA is a 6-bit wide, bidirectional port. The
corresponding data direction register is TRISA
(Register 4-2). Setting a TRISA bit (= 1) will make the
corresponding PORTA pin an input (i.e., put the
corresponding output driver in a High-impedance
mode). Clearing a TRISA bit (= 0) will make the
corresponding PORTA pin an output (i.e., put 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 4-1 shows how to
initialize PORTA.
Reading the PORTA register (Register 4-1) 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. RA3 reads ‘0’ when
MCLRE = 1.
The TRISA register controls the direction of the
PORTA pins, even when they are being used as analog
inputs. The user must 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’.
REGISTER 4-1:
Note:
Note:
2004 Microchip Technology Inc.
I/O PORTS
PORTA and the TRISA Registers
bit 7-6:
bit 5-0:
Additional information on I/O ports may be
found in the “PICmicro
Family Reference Manual” (DS33023).
The ANSEL (91h) and CMCON0 (19h)
registers must be initialized to configure
an analog channel as a digital input. Pins
configured as analog inputs will read ‘0’.
PORTA – PORTA REGISTER (ADDRESS: 05h)
bit 7
Unimplemented: Read as ‘0’
RA<5:0>: PORTA I/O Pin bit
1 = Port pin is > V
0 = Port pin is < V
Legend:
R = Readable bit
-n = Value at POR
U-0
—
®
Mid-Range MCU
U-0
—
IH
IL
R/W-x
RA5
W = Writable bit
‘1’ = Bit is set
Preliminary
R/W-x
RA4
EXAMPLE 4-1:
4.2
Every PORTA pin on the PIC16F684 has an interrupt-
on-change option and a weak pull-up option. RA0 has
an Ultra Low-Power Wake-up option. The next three
sections describe these functions.
4.2.1
Each of the PORTA pins, except RA3, has an individu-
ally configurable internal weak pull-up. Control bits
WPUAx enable or disable each pull-up. Refer to
Register 4-3. Each weak pull-up is automatically turned
off when the port pin is configured as an output. The
pull-ups are disabled on a Power-on Reset by the
RAPU bit (OPTION_REG<7>). A weak pull-up is auto-
matically enabled for RA3 when configured as MCLR
and disabled when RA3 is an I/O. There is no software
control of the MCLR pull-up.
BCF
CLRF
MOVLW
MOVWF
BSF
CLRF
MOVLW
MOVWF
BCF
Additional Pin Functions
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-x
STATUS,RP0
PORTA
07h
CMCON0
STATUS,RP0
ANSEL
0Ch
TRISA
STATUS,RP0
RA3
WEAK PULL-UPS
INITIALIZING PORTA
R/W-x
RA2
;Bank 0
;Init PORTA
;Set RA<2:0> to
;digital I/O
;Bank 1
;digital I/O
;Set RA<3:2> as inputs
;and set RA<5:4,1:0>
;as outputs
;Bank 0
PIC16F684
x = Bit is unknown
R/W-0
RA1
DS41202C-page 31
R/W-0
RA0
bit 0