X28HC64 데이터 시트보기 (PDF) - Renesas Electronics
부품명
상세내역
제조사
X28HC64 Datasheet PDF : 18 Pages
| |||
X28HC64
Resetting Software Data Protection
VCC
DATA
ADDR
CE
AAA
1555
55
0AAA
80
1555
AA
1555
55
0AAA
20
1555
tWC
WE
FIGURE 9. RESET SOFTWARE DATA PROTECTION TIMING SEQUENCE
STANDARD
OPERATING
MODE
WRITE DATA AA
TO ADDRESS
1555
WRITE DATA 55
TO ADDRESS
0AAA
WRITE DATA 80
TO ADDRESS
1555
WRITE DATA AA
ADDRESS
1555
WRITE DATA 55
TO ADDRESS
0AAA
WRITE DATA 20
TO ADDRESS
1555
FIGURE 10. SOFTWARE SEQUENCE TO DEACTIVATE SOFTWARE DATA PROTECTION
In the event the user wants to deactivate the software data
protection feature for testing or reprogramming in an EEPROM
programmer, the following six step algorithm will reset the
internal protection circuit. After tWC, the X28HC64 will be in
standard operating mode.
Note: Once initiated, the sequence of write operations should not
be interrupted.
FN8109 Rev 4.00
June 27, 2016
Page 7 of 18
Share Link: 