PIC12HV609-E/MS Microchip Technology, PIC12HV609-E/MS Datasheet - Page 34

• Manufacturer Part Number: PIC12HV609-E/MS
• Description: 1.75KB Flash, 64B RAM, 6 I/O, 8MHz Internal Oscillator 8 MSOP 3x3mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® 12Fr

Specifications of PIC12HV609-E/MS

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 5
• Program Memory Size: 1.75KB (1K x 14)
• Program Memory Type: FLASH
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Processor Series: PIC12H
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 64 B
• Interface Type: RS- 232 , USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 5
• Number Of Timers: 2
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

PIC12F609/615/617/12HV609/615
An example of the complete four-word write sequence
is shown in Example 3-2. The initial address is loaded
into the PMADRH and PMADRL register pair; the eight
words of data are loaded using indirect addressing.
EXAMPLE 3-2:
DS41302D-page 34
LOOP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; This write routine assumes the following:
;
;
;
;
BANKSEL
MOVF
MOVWF
MOVF
MOVWF
MOVF
MOVWF
MOVF
MOVWF
INCF
MOVF
MOVWF
INCF
BANKSEL
BSF
BCF
BTFSC
GOTO
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
NOP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
BCF
BSF
BANKSEL
MOVF
INCF
ANDLW
SUBLW
BTFSS
GOTO
A valid starting address (the least significant bits = '00')
is loaded in ADDRH:ADDRL
ADDRH, ADDRL and DATADDR are all located in data memory
WRITING TO FLASH PROGRAM MEMORY
PMADRH
ADDRH,W
PMADRH
ADDRL,W
PMADRL
DATAADDR,W
FSR
INDF,W
PMDATL
FSR,F
INDF,W
PMDATH
FSR,F
PMCON1
PMCON1,WREN ; Enable writes
INTCON,GIE
INTCON,GIE
$-2
55h
PMCON2
0AAh
PMCON2
PMCON1,WR
PMCON1,WREN ; Disable writes
INTCON,GIE
PMADRL
PMADRL, W
PMADRL,F
0x03
0x03
STATUS,Z
LOOP
; Load initial address
;
;
;
; Load initial data address
;
; Load first data byte into lower
;
; Next byte
; Load second data byte into upper
;
;
; Disable interrupts (if using)
; See AN576
; Start of required write sequence:
; Write 55h
;
; Write 0AAh
; Set WR bit to begin write
; Required to transfer data to the buffer
; registers
; Enable interrupts (comment out if not using interrupts)
; Increment address
; Indicates when sixteen words have been programmed
;
;
;
;
; Exit on a match,
; Continue if more data needs to be written
Required Sequence
0x0F = 16 words
0x0B = 12 words
0x07 = 8 words
0x03 = 4 words
 2010 Microchip Technology Inc.