参数资料
型号: AT28C64B-15PU
厂商: Atmel
文件页数: 10/18页
文件大小: 0K
描述: IC EEPROM 64KBIT 150NS 28DIP
标准包装: 14
格式 - 存储器: EEPROMs - 并行
存储器类型: EEPROM
存储容量: 64K (8K x 8)
速度: 150ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 28-DIP(0.600",15.24mm)
供应商设备封装: 28-PDIP
包装: 管件
产品目录页面: 1458 (CN2011-ZH PDF)
19. Software Data Protection Enable
Algorithm (1)
LOAD DATA AA
TO
ADDRESS 1555
LOAD DATA 55
TO
ADDRESS 0AAA
LOAD DATA A0
TO
20. Software Data Protection Disable
Algorithm (1)
LOAD DATA AA
TO
ADDRESS 1555
LOAD DATA 55
TO
ADDRESS 0AAA
LOAD DATA 80
TO
ADDRESS 1555
LOAD DATA XX
TO
ANY ADDRESS (4)
LOAD LAST BYTE
TO
WRITES
ENABLED (2)
ADDRESS 1555
LOAD DATA AA
TO
ADDRESS 1555
LOAD DATA 55
TO
LAST ADDRESS
ENTER DATA
ADDRESS 0AAA
PROTECT STATE
LOAD DATA 20
TO
ADDRESS 1555
EXIT DATA
Notes:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A12 - A0 (Hex).
2. Write Protect state will be activated at end of write
even if no other data is loaded.
3. Write Protect state will be deactivated at end of write
period even if no other data is loaded.
LOAD DATA XX
TO
ANY ADDRESS (4)
LOAD LAST BYTE
TO
LAST ADDRESS
PROTECT STATE (3)
4. 1 to 64 bytes of data are loaded.
Notes:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A12 - A0 (Hex).
2. Write Protect state will be activated at end of write
even if no other data is loaded.
3. Write Protect state will be deactivated at end of write
period even if no other data is loaded.
4. 1 to 64 bytes of data are loaded.
21. Software Protected Write Cycle Waveforms (1)(2)
OE
CE
t WP
t WPH
t BLC
WE
t AS
t AH
t DH
A0 -A5
A6 - A12
t DS
DATA
t WC
Notes:
10
1. A6 through A12 must specify the same page address during each high to low transition of WE (or CE) after the software
code has been entered.
2. OE must be high only when WE and CE are both low.
AT28C64B
0270L–PEEPR–2/09
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