UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 186
UPD78F9502MA-CAC-A
Manufacturer Part Number
UPD78F9502MA-CAC-A
Description
8BIT MCU, 4K FLASH, 128B RAM, SMD
Manufacturer
NEC
Datasheet
1.UPD78F9502MA-CAC-A.pdf
(229 pages)
Specifications of UPD78F9502MA-CAC-A
Controller Family/series
UPD78F
No. Of I/o's
8
Ram Memory Size
128Byte
Cpu Speed
10MHz
No. Of Timers
2
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
4KB
Oscillator Type
External, Internal
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An example of a program when the interrupt-disabled time (from write to internal verify) should be minimized in self
programming mode is shown below.
;---------------------------------------------------------------------
;START
;---------------------------------------------------------------------
FlashWrite:
FlashWriteLoop:
; Sets write command
MOVW
MOVW
MOV
MOV
MOV
MOV
MOV
MOV
MOV
CALL
; Execution of write command
MOV
MOV
HALT
MOV
CMP
BNZ
CALL
MOV
EI
; Judgment of writing all data
INCW
MOVW
CMPW
BNC
INCW
BR
; Setting internal verify command
HL,#DataAdrTop ; Sets address at which data to be written is located
DE,#WriteAdr
FLCMD,#05H
A,D
FLAPH,A
A,E
FLAPL,A
A,[HL]
FLW,A
!ModeOn
PFS,#00H
WDTE,#0ACH
A,PFS
A,#00H
$StatusError
!ModeOff
MK0,#INT_MK0
HL
AX,HL
AX,#DataAdrBtm ; Performs internal verify processing
$FlashVerify
DE
FlashWriteLoop
; Sets address at which data is to be written
; Sets flash control command (byte write)
; Sets address at which data is to be written
; Sets address at which data is to be written
; Sets data to be written
; Shift to self programming mode
; Clears flash status register
; Clears & restarts WDT
; Self programming is started
; Checks write error
; Performs abnormal termination processing when an error
; occurs.
; Shift to normal mode
; Restores interrupt mask flag
; Address at which data to be written is located + 1
; if write of all data is completed
; Address at which data is to be written + 1
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 14 FLASH MEMORY
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