参数资料
型号: X28HC64P-12
厂商: Intersil
文件页数: 7/17页
文件大小: 0K
描述: IC EEPROM 64KBIT 120NS 28DIP
标准包装: 13
格式 - 存储器: EEPROMs - 并行
存储器类型: EEPROM
存储容量: 64K (8K x 8)
速度: 120ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°C
封装/外壳: 28-DIP(0.600",15.24mm)
供应商设备封装: 28-PDIP
包装: 管件
X28HC64
Resetting Software Data Protection
V CC
DATA
ADDR
AAA
1555
55
0AAA
80
1555
AA
1555
55
0AAA
20
1555
≥ t WC
STANDARD
OPERATING
MODE
CE
WE
FIGURE 8. RESET SOFTWARE DATA PROTECTION TIMING SEQUENCE
In the event the user wants to deactivate the software data
protection feature for testing or reprogramming in an
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 9. SOFTWARE SEQUENCE TO DEACTIVATE
SOFTWARE
7
EEPROM programmer, the following six step algorithm will
reset the internal protection circuit. After t WC , the X28HC64
will be in standard operating mode.
Note: Once initiated, the sequence of write operations
should not be interrupted.
FN8109.2
August 28, 2009
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