PIC16F1827-E/P Microchip Technology Inc., PIC16F1827-E/P Datasheet - Page 110
![no-image](/images/manufacturer_photos/0/4/440/microchip_technology_inc__sml.jpg)
PIC16F1827-E/P
Manufacturer Part Number
PIC16F1827-E/P
Description
7 KB Flash, 384 bytes RAM, 32 MHz Int. Osc, 16 I/0, Enhanced Mid Range Core
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16F1826-ISO.pdf
(406 pages)
Specifications of PIC16F1827-E/P
A/d Inputs
12-Channel, 10-Bit
Comparators
2
Cpu Speed
8 MIPS
Eeprom Memory
256 Bytes
Input Output
16
Interface
CAN/I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
18-pin PDIP
Programmable Memory
7K Bytes
Ram Size
384 Bytes
Speed
32 MHz
Timers
4-8-bit, 1-16-bit
Voltage, Range
1.8-5.5 V
Standby Current (pic16lf182x)
30 nA @ 1.8 V, Typical
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PIC16(L)F1826/27
EXAMPLE 11-5:
DS41391D-page 110
; This write routine assumes the following:
; 1. The 16 bytes of data are loaded, starting at the address in DATA_ADDR
; 2. Each word of data to be written is made up of two adjacent bytes in DATA_ADDR,
;
; 3. A valid starting address (the least significant bits = 000) is loaded in ADDRH:ADDRL
; 4. ADDRH and ADDRL are located in shared data memory 0x70 - 0x7F (common RAM)
;
LOOP
START_WRITE
stored in little endian format
BCF
BANKSEL
MOVF
MOVWF
MOVF
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
BSF
BCF
BSF
BSF
MOVIW
MOVWF
MOVIW
MOVWF
MOVF
XORLW
ANDLW
BTFSC
GOTO
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
NOP
INCF
GOTO
BCF
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
NOP
BCF
BSF
WRITING TO FLASH PROGRAM MEMORY
INTCON,GIE
EEADRH
ADDRH,W
EEADRH
ADDRL,W
EEADRL
LOW DATA_ADDR
FSR0L
HIGH DATA_ADDR ; Load initial data address
FSR0H
EECON1,EEPGD
EECON1,CFGS
EECON1,WREN
EECON1,LWLO
FSR0++
EEDATL
FSR0++
EEDATH
EEADRL,W
0x07
0x07
STATUS,Z
START_WRITE
55h
EECON2
0AAh
EECON2
EECON1,WR
EEADRL,F
LOOP
EECON1,LWLO
55h
EECON2
0AAh
EECON2
EECON1,WR
EECON1,WREN
INTCON,GIE
; Disable ints so required sequences will execute properly
; Bank 3
; Load initial address
;
;
;
; Load initial data address
;
;
; Point to program memory
; Not configuration space
; Enable writes
; Only Load Write Latches
; Load first data byte into lower
;
; Load second data byte into upper
;
; Check if lower bits of address are '000'
; Check if we're on the last of 8 addresses
;
; Exit if last of eight words,
;
; Start of required write sequence:
; Write 55h
;
; Write AAh
; Set WR bit to begin write
; Any instructions here are ignored as processor
; halts to begin write sequence
; Processor will stop here and wait for write to complete.
; After write processor continues with 3rd instruction.
; Still loading latches Increment address
; Write next latches
; No more loading latches - Actually start Flash program
; memory write
; Start of required write sequence:
; Write 55h
;
; Write AAh
; Set WR bit to begin write
; Any instructions here are ignored as processor
; halts to begin write sequence
; Processor will stop here and wait for write complete.
; after write processor continues with 3rd instruction
; Disable writes
; Enable interrupts
2011 Microchip Technology Inc.
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