UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 315

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

An example of a program when the interrupt-disabled time (from erasure to blank check) should be minimized in
self programming mode is shown below.
;---------------------------------------------------------------------
;START
;---------------------------------------------------------------------
FlashBlockErase:
; Sets erase command
MOV
MOV
MOV
MOV
MOV
CALL
; Execution of erase command
MOV
MOV
HALT
MOV
CMP
BNZ
CALL
; Sets blank check command
MOV
MOV
MOV
MOV
MOV
CALL
; Execution of blank check command
MOV
MOV
HALT
MOV
CMP
BNZ
FLCMD,#03H
FLAPH,#07H
FLAPL,#00H
FLAPHC,#07H
FLAPLC,#00H
!ModeOn
PFS,#00H
WDTE,#0ACH
A,PFS
A,#00H
$StatusError
!ModeOff
FLCMD,#04H
FLAPH,#07H
FLAPL,#00H
FLAPHC,#07H
FLAPLC,#0FFH
!ModeOn
PFS,#00H
WDTE,#0ACH
A,PFS
A,#00H
$StatusError
; Sets flash control command (block erase)
; Sets number of block to be erased (block 7 is specified here)
; Fixes FLAPL to “00H”
; Sets erase block compare number (same value as that of FLAPH)
; Fixes FLAPLC to “00H”
; Shift to self programming mode
; Clears flash status register
; Clears & restarts WDT
; Self programming is started
; Checks erase error
; Performs abnormal termination processing when an error
; occurs.
; Shift to normal mode
; Sets flash control command (block blank check)
; Sets block number for blank check (block 7 is specified here)
; Fixes FLAPL to “00H”
; Sets blank check block compare number (same value as that of
; FLAPH)
; Fixes FLAPLC to “FFH”
; Shift to self programming mode
; Clears flash status register
; Clears & restarts WDT
; Self programming is started
; Checks blank check error
; Performs abnormal termination processing when an error occurs
CHAPTER 18 FLASH MEMORY
User’s Manual U16898EJ5V0UD
315