PIC16LF84AT-04/SO Microchip Technology, PIC16LF84AT-04/SO Datasheet - Page 50
![IC MCU FLASH 1KX14 EE 18SOIC](/photos/6/76/67656/150-18-soic_sml.jpg)
PIC16LF84AT-04/SO
Manufacturer Part Number
PIC16LF84AT-04/SO
Description
IC MCU FLASH 1KX14 EE 18SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F84A-04P.pdf
(88 pages)
2.PIC16F84A-04P.pdf
(6 pages)
3.PIC16LF84A-04P.pdf
(125 pages)
4.PIC16LF84A-04P.pdf
(4 pages)
Specifications of PIC16LF84AT-04/SO
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
13
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
68 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
18-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Connectivity
-
- PIC16F84A-04P PDF datasheet
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PIC16F8X
8.10
During an interrupt, only the return PC value is saved
on the stack. Typically, users wish to save key register
values during an interrupt (e.g., W register and
STATUS register). This is implemented in software.
Example 8-1 stores and restores the STATUS and W
register’s values. The User defined registers, W_TEMP
and STATUS_TEMP are the temporary storage
locations for the W and STATUS registers values.
EXAMPLE 8-1:
PUSH
ISR
POP
DS30430C-page 50
Context Saving During Interrupts
MOVWF
SWAPF
MOVWF
:
:
:
:
SWAPF
MOVWF
SWAPF
SWAPF
W_TEMP
STATUS, W
STATUS_TEMP
STATUS_TEMP, W
STATUS
W_TEMP, F
W_TEMP, W
SAVING STATUS AND W REGISTERS IN RAM
; Copy W to TEMP register,
; Swap status to be saved into W
; Save status to STATUS_TEMP register
:
; Interrupt Service Routine
;
;
; Swap nibbles in STATUS_TEMP register
; and place result into W
; Move W into STATUS register
;
; Swap nibbles in W_TEMP and place result in W_TEMP
; Swap nibbles in W_TEMP and place result into W
should configure Bank as required
(sets bank to original state)
Example 8-1 does the following:
a)
b)
c)
d)
e)
Stores the W register.
Stores the STATUS register in STATUS_TEMP.
Executes the Interrupt Service Routine code.
Restores the STATUS (and bank select bit)
register.
Restores the W register.
1998 Microchip Technology Inc.
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