Technical information

72
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 71 Programming/Erasing algorithm flow chart
START
V
CC = 5 V, V PP = V PP H
ADRS = first location
X = 0
WRITE PROGRAM
COMMAND
WRITE PROGRAM
DATA
DURATION = 10 µs
X = X + 1
WRITE PROGRAM-VERIFY
COMMAND
40
16
D IN
C0 16
00 16
DURATION = 6 µs
X = 25 ?
LAST ADRS ?
NO
INC ADRS
WRITE READ COMMAND
V
PP = V PP L
DEVICE
PASSED
DEVICE
FAILED
VERIFY BYTE ? VERIFY BYTE ?
FAIL
FAIL
Program Erase
YES
YES
NO
PASS
PASS
START
V
CC = 5 V, V PP = V PP H
ADRS = first location
X = 0
WRITE ERASE
COMMAND
PROGRAM
ALL BYTES = 00
16
ALL
BYTES = 00
16 ?
WRITE ERASE
COMMAND
DURATION = 9.5 ms
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
V
PP = V PP L
DEVICE
PASSED
DEVICE
FAILED
VERIFY BYTE ? VERIFY BYTE ?
FAIL
FAIL
YES
YES
NO
PASS
PASS
YES
NO