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WE512K8-300CM Datasheet(PDF) 10 Page - White Electronic Designs Corporation |
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WE512K8-300CM Datasheet(HTML) 10 Page - White Electronic Designs Corporation |
10 / 13 page WE512K8, WE256K8, WE128K8-XCX 10 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs May 2000 Rev. 1 White Electronic Designs Corp. reserves the right to change products or specifications without notice. FIGURE 10 – SOFTWARE BLOCK DATA PROTECTION ENABLE ALGORITHM NOTES: 1. Data Format: I/O7-0 (Hex); Address Format: A14 -A0 (Hex). A17 and A18 control selection of one of four blocks in the 512Kx8. A15, A16, and A17 control selection of one of 8 pages in the 256Kx8. A15 and A16 control one of the four blocks in the 128Kx8. 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 128 bytes of data at each of 4 blocks may be loaded in the 512Kx8. 1 to 64 bytes of data at each of 8 blocks may be loaded in the 256Kx8 and 1 to 64 bytes on 4 blocks in the 128Kx8. (1) WRITES ENABLED(2) ENTER DATA PROTECT STATE LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA A0 TO ADDRESS 5555 LOAD DATA XX TO ANY ADDRESS(4) LOAD LAST BYTE TO LAST ADDRESS |
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