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AM29SL160C 数据表(PDF) 16 Page - Advanced Micro Devices |
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AM29SL160C 数据表(HTML) 16 Page - Advanced Micro Devices |
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16 / 52 page ![]() 14 Am29SL160C 21635C5 January 23, 2007 D A TA SH EE T Autoselect Mode The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on DQ7–DQ0. 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 V ID on address pin A9. Address pins A6, A1, and A0 must be as shown in Table 4. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits (see Tables 2 and 3). Table 4 shows the remaining address bits that are don’t care. When all necessary bits are set as required, the programming equipment may then read the corresponding 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 12, on page 26. This method does not require V ID. See “Command Def- initions” on page 21 for details on using the autoselect mode. Table 4. Am29SL160C Autoselect Codes (High Voltage Method) L = Logic Low = V IL, H = Logic High = VIH, SA = Sector Address, X = Don’t care. Note: Outputs for data bits DQ8–DQ15 are for BYTE#=V IH. DQ8–DQ15 are don’t care when BYTE#=VIL. Description Mode CE# OE# WE# A19 to A12 A11 to A10 A9 A8 to A7 A6 A5 to A2 A1 A0 DQ8 to DQ15 DQ7 to DQ0 Manufacturer ID: AMD L L H X X V ID XLXL L X 01h Device ID: Am29SL160CT (Top Boot Block) Word L L H XX V ID XLXL H 22h E4 Byte L L H X E4 Device ID: Am29SL160CB (Bottom Boot Block) Word L L H XX V ID XLXL H 22h E7 Byte L L H X E7 Sector Protection Verification L L H SA X VID XLX H L X 01h (protected) X 00h (unprotected) SecSi Sector Indicator bit (DQ7) LL H SA X VID XLX H H X 81h (factory locked) |
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