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AM29LV081B-90EF Datasheet(PDF) 11 Page - Advanced Micro Devices |
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AM29LV081B-90EF Datasheet(HTML) 11 Page - Advanced Micro Devices |
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11 / 40 page  21525D6 October 12, 2006 Am29LV081B 9 D A TA SH EE T Table 2. Am29LV081B Sector Address Table 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 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 (11.5 V to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in Table 3. In addition, when verifying sector protection, the sec- tor address must appear on the appropriate highest order address bits (see Table 2). Table 3 shows the re- maining address bits that are don’t care. When all nec- essary bits have been 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 4. This method does not require VID. See “Command Definitions” for details on using the autoselect mode. Table 3. Am29LV081B Autoselect Codes (High Voltage Method) L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care. A19 A18 A17 A16 A15 A14 A13 Sector Size Address Range SA0 0 0 0 0 X X X 64 Kbytes 00000h-0FFFFh SA1 0 0 0 1 X X X 64 Kbytes 10000h-1FFFFh SA2 0 0 1 0 X X X 64 Kbytes 20000h-2FFFFh SA3 0 0 1 1 X X X 64 Kbytes 30000h-3FFFFh SA4 0 1 0 0 X X X 64 Kbytes 40000h-4FFFFh SA5 0 1 0 1 X X X 64 Kbytes 50000h-5FFFFh SA6 0 1 1 0 X X X 64 Kbytes 60000h-6FFFFh SA7 0 1 1 1 X X X 64 Kbytes 70000h-7FFFFh SA8 1 0 0 0 X X X 64 Kbytes 80000h-8FFFFh SA9 1 0 0 1 X X X 64 Kbytes 90000h-9FFFFh SA10 1 0 1 0 X X X 64 Kbytes A0000h-AFFFFh SA11 1 0 1 1 X X X 64 Kbytes B0000h-BFFFFh SA12 1 1 0 0 X X X 64 Kbytes C0000h-CFFFFh SA13 1 1 0 1 X X X 64 Kbytes D0000h-DFFFFh SA14 1 1 1 0 X X X 64 Kbytes E0000h-EFFFFh SA15 1 1 1 1 X X X 64 Kbytes F0000h-FFFFFh Description CE# OE# WE# A19 to A13 A12 to A10 A9 A8 to A7 A6 A5 to A2 A1 A0 DQ7 to DQ0 Manufacturer ID: AMD L L H X X VID X L X L L 01h Device ID: Am29LV081B L L H X X VID X L X L H 38h Sector Protection Verification L L H SA X VID X L X H L 01h (protected) 00h (unprotected) |
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