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AM29DL322GT30PCF Datasheet(PDF) 19 Page - SPANSION |
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AM29DL322GT30PCF Datasheet(HTML) 19 Page - SPANSION |
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19 / 58 page  December 4, 2006 25686B10 Am29DL32xG 17 D A TA SH EE T Autoselect Mode The autoselect mode provides manufacturer and de- vice identification, and sector protection verification, through identifier codes output on DQ7–DQ0. This mode is primarily intended for programming equip- ment to automatically match a device to be pro- gramme d with its corresponding programm ing algorithm. However, the autoselect codes can also be accessed in-system through the command register. When using programming equipment, the autoselect mode requires V ID (8.5 V to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in Table 7. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits (see Tables 3–6). Table 7 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 corre- sponding identifier code on DQ7–DQ0. To access the autoselect codes in-system, the host system can issue the autoselect command via the command register, as shown in Table 14. This method does not require V ID. Refer to the Autoselect Com- mand Sequence section for more information. Table 7. Autoselect Codes, (High Voltage Method) Legend: T = Top Boot Block, B = Bottom Boot Block, L = Logic Low = V IL, H = Logic High = VIH, BA = Bank Address, SA = Sector Address, X = Don’t care. Description CE# OE# WE# A20 to A12 A11 to A10 A9 A8 to A7 A6 A5 to A2 A1 A0 DQ8 to DQ15 DQ7 to DQ0 BYTE# = V IH BYTE# = V IL Manufacturer ID: AMD L L H BA X V ID XLXL L X X 01h Device ID: Am29DL322G L L H BA X V ID X L X L H 22h X 55h (T), 56h (B) Device ID: Am29DL323G L L H BA X V ID X L X L H 22h X 50h (T), 53h (B) Device ID: Am29DL324G L L H BA X V ID X L X L H 22h X 5Ch (T), 5Fh (B) Sector Protection Verification LL H SA X V ID XLX H L X X 01h (protected), 00h (unprotected) Secured Silicon Indicator Bit (DQ7) LL H BA X V ID XLX H H X X 82h (factory locked), 02h (not factory locked) |
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