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A29L004AUL-90F Datasheet(PDF) 8 Page - AMIC Technology |
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A29L004AUL-90F Datasheet(HTML) 8 Page - AMIC Technology |
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8 / 39 page  A29L004A Series PRELIMINARY (March, 2005, Version 0.0) 7 AMIC Technology, Corp. Autoselect Mode The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on I/O7 - I/O0. This mode is primarily intended for programming equipment to automatically match a device to be programmed with its corresponding programming algorithm. However, the autoselect codes can also be accessed in-system through the command register. When using programming equipment, the autoselect mode requires VID (11.5V to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in Autoselect Codes (High Voltage Method) table. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits. Refer to the corresponding Sector Address Tables. The Command Definitions table shows the remaining address bits that are don't care. When all necessary bits have been set as required, the programming equipment may then read the corresponding identifier code on I/O7 - I/O0.To access the autoselect codes in-system, the host system can issue the autoselect command via the command register, as shown in the Command Definitions table. This method does not require VID. See "Command Definitions" for details on using the autoselect mode. Table 4. A29L004A Autoselect Codes (High Voltage Method) Description CE OE WE A18 to A13 A12 to A10 A9 A8 to A7 A6 A5 to A2 A1 A0 I/O7 to I/O0 Manufacturer ID: AMIC L L H X X VID X L X L L 37h Device ID: A29L004A (Top Boot Block) L L H X X VID X L X L H 34h Device ID: A29L004A (Bottom Boot Block) L L H X X VID X L X L H B5h Continuation ID L L H X X VID X L X H H 7Fh 01h (protected) Sector Protection Verification L L H SA X VID X L X H L 00h (unprotected) L=Logic Low= VIL, H=Logic High=VIH, SA=Sector Address, X=Don’t Care. Note: The autoselect codes may also be accessed in-system via command sequences. |
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