DSPIC30F6014A-30I/PF Microchip Technology Inc., DSPIC30F6014A-30I/PF Datasheet - Page 55

• Manufacturer Part Number: DSPIC30F6014A-30I/PF
• Description: 16 BIT MCU/DSP 80LD 30MIPS 144 KB FLASH
• Manufacturer: Microchip Technology Inc.
• Type: DSPr

Specifications of DSPIC30F6014A-30I/PF

• A/d Inputs: 16-Channels, 12-Bit
• Cpu Speed: 30 MIPS
• Eeprom Memory: 4K Bytes
• Input Output: 68
• Interface: CAN/I2C/SPI/UART
• Ios: 68
• Memory Type: Flash
• Number Of Bits: 16
• Package Type: 80-pin TQFP
• Programmable Memory: 144K Bytes
• Ram Size: 8K Bytes
• Timers: 5-16-bit, 2-32-bit
• Voltage, Range: 2.5-5.5
• Lead Free Status / Rohs Status: RoHS Compliant part

6.6
A complete programming sequence is necessary for
programming or erasing the internal Flash in RTSP
mode. A programming operation is nominally 2 msec in
duration and the processor stalls (waits) until the oper-
ation is finished. Setting the WR bit (NVMCON<15>)
starts the operation, and the WR bit is automatically
cleared when the operation is finished.
6.6.1
The user can erase and program one row of program
Flash memory at a time. The general process is:
1.
2.
3.
EXAMPLE 6-1:
© 2005 Microchip Technology Inc.
; Setup NVMCON for erase operation, multi word write
; program memory selected, and writes enabled
; Init pointer to row to be ERASED
Read one row of program Flash (32 instruction
words) and store into data RAM as a data
“image”.
Update the data image with the desired new
data.
Erase program Flash row.
a)
b)
c)
d)
e)
f)
g)
Programming Operations
Setup NVMCON register for multi-word,
program Flash, erase, and set WREN bit.
Write address of row to be erased into
NVMADRU/NVMADR.
Write ‘55’ to NVMKEY.
Write ‘AA’ to NVMKEY.
Set the WR bit. This will begin erase cycle.
CPU will stall for the duration of the erase
cycle.
The WR bit is cleared when erase cycle
ends.
MOV
MOV
MOV
MOV
MOV
MOV
DISI
MOV
MOV
MOV
MOV
BSET
NOP
NOP
PROGRAMMING ALGORITHM FOR
PROGRAM FLASH
#0x4041,W0
W0
#tblpage(PROG_ADDR),W0
W0
#tbloffset(PROG_ADDR),W0
W0, NVMADR
#5
#0x55,W0
W0
#0xAA,W1
W1
NVMCON,#WR
,
,
,
,
ERASING A ROW OF PROGRAM MEMORY
dsPIC30F6011A/6012A/6013A/6014A
NVMCON
NVMADRU
NVMKEY
NVMKEY
Preliminary
;
; Init NVMCON SFR
;
; Initialize PM Page Boundary SFR
; Intialize in-page EA[15:0] pointer
; Initialize NVMADR SFR
; Block all interrupts with priority <7 for
; next 5 instructions
; Write the 0x55 key
;
; Write the 0xAA key
; Start the erase sequence
; Insert two NOPs after the erase
; command is asserted
4.
5.
6.
6.6.2
Example 6-1 shows a code sequence that can be used
to erase a row (32 instructions) of program memory.
Write 32 instruction words of data from data
RAM “image” into the program Flash write
latches.
Program 32 instruction words into program
Flash.
a)
b)
c)
d)
e)
f)
Repeat steps 1 through 5 as needed to program
desired amount of program Flash memory.
Setup NVMCON register for multi-word,
program Flash, program, and set WREN
bit.
Write ‘55’ to NVMKEY.
Write ‘AA’ to NVMKEY.
Set the WR bit. This will begin program
cycle.
CPU will stall for duration of the program
cycle.
The WR bit is cleared by the hardware
when program cycle ends.
ERASING A ROW OF PROGRAM
MEMORY
DS70143B-page 53