Technical information

84
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 82 Flowchart of program/erase operation at CPU reprogramming mode
ERASE PROGRAM
BUSY FLAG = 0
START
ADRS = first location
X = 0
WRITE PROGRAM
COMMAND
WRITE PROGRAM
DATA
WAIT 1µs
X = X + 1
WRITE PROGRAM-VERIFY
COMMAND
40
16
DIN
C0
16
00 16
DURATION = 6 µs
X = 25 ?
LAST ADRS ?
NO
INC ADRS
WRITE READ COMMAND
DEVICE
PASSED
DEVICE
FAILED
VERIFY BYTE ? VERIFY BYTE ?
FAIL
FAIL
Program Erase
YES
YES
NO
PASS
PASS
START
ADRS = first location
X = 0
WRITE ERASE
COMMAND
PROGRAM
ALL BYTES = 00
16
ALL
BYTES = 00
16 ?
WRITE ERASE
COMMAND
X = X + 1
WRITE ERASE-VERIFY
COMMAND
20
16
20 16
A0 16
00 16
DURATION = 6 µs
X = 1000 ?
LAST ADRS ?
NO
INC ADRS
WRITE READ COMMAND
DEVICE
PASSED
DEVICE
FAILED
VERIFY BYTE ? VERIFY BYTE ?
FAIL
FAIL
YES
YES
NO
PASS
PASS
YES
NO
ERASE PROGRAM
BUSY FLAG = 0
WAIT 1µs
NO
YES
YES
NO