PIC16LF72-I/SS Microchip Technology, PIC16LF72-I/SS Datasheet - Page 23
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PIC16LF72-I/SS
Manufacturer Part Number
PIC16LF72-I/SS
Description
IC PIC MCU FLASH 2KX14 28SSOP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16LF627A-IP.pdf
(8 pages)
2.PIC16F818-ISO.pdf
(6 pages)
3.PIC16F72-ISO.pdf
(136 pages)
4.PIC16F72-ISO.pdf
(136 pages)
Specifications of PIC16LF72-I/SS
Core Size
8-Bit
Program Memory Size
3.5KB (2K x 14)
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Core Processor
PIC
Speed
20MHz
Connectivity
I²C, SPI
Number Of I /o
22
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 5x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SSOP
Controller Family/series
PIC16LF
No. Of I/o's
22
Ram Memory Size
128Byte
Cpu Speed
16MHz
No. Of Timers
3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16LF72-I/SS
Manufacturer:
Microchi
Quantity:
92 666
Part Number:
PIC16LF72-I/SS
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
3.0
Some pins for these I/O ports are multiplexed with an
alternate function for the peripheral features on the
device. In general, when a peripheral is enabled, that
pin may not be used as a general purpose I/O pin.
Additional information on I/O ports may be found in the
PIC™
(DS33023).
3.1
PORTA is a 6-bit wide, bi-directional port. The corre-
sponding data direction register is TRISA. Setting a
TRISA bit (= 1) will make the corresponding PORTA pin
an input (i.e., put the corresponding output driver in a
Hi-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).
Reading the PORTA register, 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.
Pin RA4 is multiplexed with the Timer0 module clock
input to become the RA4/T0CKI pin. The RA4/T0CKI
pin is a Schmitt Trigger input and an open drain output.
All other RA port pins have TTL input levels and full
CMOS output drivers.
Other PORTA pins are multiplexed with analog inputs
and analog V
selected by clearing/setting the control bits in the
ADCON1 register (A/D Control Register1).
The TRISA register controls the direction of the RA
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.
EXAMPLE 3-1:
© 2007 Microchip Technology Inc.
BANKSEL
CLRF
BANKSEL
MOVLW
MOVWF
MOVLW
MOVWF
Note:
I/O PORTS
PORTA and the TRISA Register
Mid-Range
On a Power-on Reset, these pins are con-
figured as analog inputs and read as ‘0’.
REF
PORTA
PORTA
ADCON1 ; Select Bank for ADCON1
0x06
ADCON1 ; as digital inputs
0xCF
TRISA
input. The operation of each pin is
INITIALIZING PORTA
MCU
; select bank for PORTA
; Initialize PORTA by
; clearing output
; data latches
; Configure all pins
; Value used to
; initialize data
; direction
; Set RA<3:0> as inputs
; RA<5:4> as outputs
; TRISA<7:6> are always
; read as ‘0’.
Reference
Manual,
FIGURE 3-1:
FIGURE 3-2:
WR
TRIS
WR
Port
RD Port
To A/D Converter
Data
Bus
WR
TRIS
Data
Bus
WR
Port
RD Port
TMR0 Clock Input
TRIS Latch
D
Data Latch
D
CK
CK
Data Latch
TRIS Latch
D
D
CK
CK
RD TRIS
Q
Q
Q
Q
Q
Q
RD TRIS
Q
Q
BLOCK DIAGRAM OF
RA3:RA0 AND RA5 PINS
BLOCK DIAGRAM OF
RA4/T0CKI PIN
Q
PIC16F72
Q
EN
Analog
Input
Mode
Schmitt
Trigger
Input
Buffer
EN
EN
V
D
V
N
V
P
N
DS39597C-page 21
D
SS
SS
DD
V
SS
V
V
DD
SS
TTL
Input
Buffer
I/O pin
I/O pin