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HY29LV160BF-90 Datasheet(PDF) 11 Page - Hynix Semiconductor |
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HY29LV160BF-90 Datasheet(HTML) 11 Page - Hynix Semiconductor |
11 / 48 page 11 Rev. 1.2/May 01 HY29LV160 START (Note: All sectors must be protected prior to unprotecting any sector) TRYCNT = 1 SNUM = 0 RESET# = V ID Wait 1 us Write 0x60 to device Write 0x60 to Address Set Address: A[19:12] = Sector SNUM A[6] = 1, A]1] = 1, A]0] = 0 Write 0x40 to Address Read from Address Data = 0x00? SNUM = 34? YES TRYCNT = 1000? NO Increment TRYCNT NO YES DEVICE FAILURE YES NO RESET# = V IH Write Reset Command SECTOR UNPROTECT COMPLETE SNUM = SNUM + 1 Wait 15 ms Set Address: A[6] = 1, A]1] = 1, A]0] = 0 Figure 2. Sector Unprotect Algorithm START RESET# = V ID (All protected sectors become unprotected) Perform Program or Erase Operations RESET# = V IH (All previously protected sectors return to protected state) TEMPORARY SECTOR UNPROTECT COMPLETE Figure 3. Temporary Sector Unprotect Algorithm Electronic ID Operation (High Voltage Method) The Electronic ID mode provides manufacturer and device identification and sector protection verifi- cation through codes output on DQ[15:0]. This mode is intended primarily for programming equip- ment to automatically match a device to be pro- grammed with its corresponding programming al- gorithm. Two methods are provided for accessing the Elec- tronic ID data. The first requires V ID on address pin A[9], with additional requirements for obtain- ing specific data items listed in Table 4. The Elec- tronic ID data can also be obtained by the host through specific commands issued via the com- mand register, as described in the ‘Device Com- mands’ section of this data sheet. While in the high-voltage Electronic ID mode, the system may read at specific addresses to obtain certain device identification and status informa- tion: A read cycle at address 0xXXX00 retrieves the manufacturer code. A read cycle at address 0xXXX01 in Word mode or 0xXXX02 in Byte mode returns the device code. A read cycle containing a sector address (SA) in A[19:12] and the address 0x02 in Word mode or 0x04 in Byte mode, returns 0x01 if that sec- tor is protected, or 0x00 if it is unprotected. |
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