tmp89fm82t TOSHIBA Semiconductor CORPORATION, tmp89fm82t Datasheet - Page 378
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tmp89fm82t
Manufacturer Part Number
tmp89fm82t
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM82T.pdf
(458 pages)
- Current page: 378 of 458
- Download datasheet (5Mb)
21.5
Access to the Flash Memory Area
RA000
main section code abs = 0x8000
; #### Transfer the program to RAM #### (step 2)
sRAMLOOP:
; #### Set a nonmaskable interrupt vector inside the RAM area #### (step 3)
; #### Allocate RAM to the code area. Switch the vector area to RAM #### (step 4)
; #### Sector erase and write process ####
; Sector erase process (step 5)
; Write process (step 11)
; #### Allocate RAM to the code area. Switch the vector area to RAM #### (step 17)
; #### Execute the next main program ####
; #### Program to be executed in RAM ####
sRAMprogStart:
Note 3: Before jumping from the flash memory to the RAM area, RAM must be allocated to the code area by
Example: Case in which a program is transferred to RAM, a sector erase is performed on Block7 (0xE000 to 0xFFFF)
making the appropriate SYSCR3<RAREA> setting (setting made in step 4 in the procedure described
on the previous page).
in the code area, and then 0x3F data is written to 0xE500.
If nonmaskable interrupts (INTSWI, INTUNDEF or INTWDT) occur, system clock reset is generated.
cRAMStartAdd equ 0x0200
DI
LD
LD
LD
LD
INC
INC
CMP
J
LD
LDW
LD
LDW
LD
LD
LD
LD
LD
LD
CALL
LD
LD
LD
CALL
LD
LD
:
J
NOP
NOP
NOP
HL,cRAMStartAdd
IX,sRAMprogStart
A,(IX)
(HL),A
HL
IX
IX,sRAMprogEnd
NZ,sRAMLOOP
HL,0x01FC
(HL),sINTSWI - sRAMprogStart + cRAMStartAdd
HL,0x01F8
(HL),sINTWDT - sRAMprogStart + cRAMStartAdd
(SYSCR3),0x06
(SYSCR4),0xD4
HL,0xF555
DE,0xFAAA
C,0x00
IX,0xE000
sSectorErase - sRAMprogStart + cRAMStartAdd
C,0x00
IX,0xE500
B,0x3F
sByteProgram - sRAMprogStart + cRAMStartAdd
(SYSCR3),0x00
(SYSCR4),0xD4
:
XXXXX
Page 362
; RAM start address
; Disable interrupts (step 1)
; Transfer the program from sRAMprogStart to
; sRAMprogEnd to cRAMStartAdd.
; Set INTUNDEF and INTSWI interrupt vectors
; Set INTWDT interrupt vector
; Set RAREA and RVCTR to "1"
; Enable Code
; Variable for command sequence
; Variable for command sequence
; Set upper addresses
; Set middle and lower addresses (Block7)
; Perform a sector erase (Block7)
; Set upper addresses
; Set middle and lower addresses
; Data to be written
; Write process (0xE500)
; Set RAREA and RVCTR to "0"
; Enable Code
; Execute the main program
; Fail-safe process
TMP89FM82T
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