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AM29F400AB-120EC Datasheet(PDF) 10 Page - Advanced Micro Devices |
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AM29F400AB-120EC Datasheet(HTML) 10 Page - Advanced Micro Devices |
10 / 35 page 10 Am29F400AT/Am29F400AB PRELIMINARY Table 5. Sector Address Tables (Am29F400AT) Table 6. Sector Address Tables (Am29F400AB) Write Device erasure and programming are accomplished via the command register. The contents of the register serve as inputs to the internal state machine. The state ma- chine outputs dictate the function of the device. The command register itself does not occupy any ad- dressable memory location. The register is a latch used to store the commands, along with the address and data information needed to execute the command. The com- mand register is written to by bringing WE to VIL, while CE is at VIL and OE is at VIH. Addresses are latched on the falling edge of WE or CE, whichever happens later; while data is latched on the rising edge of WE or CE, whichever happens first. Standard microprocessor write timings are used. Refer to AC Write Characteristics and the Erase/Pro- gramming Waveforms for specific timing parameters. Sector Protection The Am29F400A features hardware sector protection. This feature will disable both program and erase opera- tions in any combination of ten sectors of memory. The sector protect feature is enabled using programming equipment at the user’s site. The device is shipped with all sectors unprotected. Alternatively, AMD may program and protect sectors in the factory prior to shipping the device (AMD’s ExpressFlash ™ Service). A17 A16 A15 A14 A13 A12 (x8) Address Range (x16) Address Range SA0 0 0 0 X X X 00000h-0FFFFh 00000h-07FFFh SA1 0 0 1 X X X 10000h-1FFFFh 08000h-0FFFFh SA2 0 1 0 X X X 20000h-2FFFFh 10000h-17FFFh SA3 0 1 1 X X X 30000h-3FFFFh 18000h-1FFFFh SA4 1 0 0 X X X 40000h-4FFFFh 20000h-27FFFh SA5 1 0 1 X X X 50000h-5FFFFh 28000h-2FFFFh SA6 1 1 0 X X X 60000h-6FFFFh 30000h-37FFFh SA7 1110 X X 70000h-77FFFh 38000h-3BFFFh SA8 111100 78000h-79FFFh 3C000h-3CFFFh SA9 111101 7A000h-7BFFFh 3D000h-3DFFFh SA10 11111 X 7C000h-7FFFFh 3E000h-3FFFFh A17 A16 A15 A14 A13 A12 (x8) Address Range (x16) Address Range SA0 00000 X 00000h-03FFFh 00000h-01FFFh SA1 000010 04000h-05FFFh 02000h-02FFFh SA2 000011 06000h-07FFFh 03000h-03FFFh SA3 0001 X X 08000h-0FFFFh 04000h-07FFFh SA4 0 0 1 X X X 10000h-1FFFFh 08000h-0FFFFh SA5 0 1 0 X X X 20000h-2FFFFh 10000h-17FFFh SA6 0 1 1 X X X 30000h-3FFFFh 18000h-1FFFFh SA7 1 0 0 X X X 40000h-4FFFFh 20000h-27FFFh SA8 1 0 1 X X X 50000h-5FFFFh 28000h-2FFFFh SA9 1 1 0 X X X 60000h-6FFFFh 30000h-37FFFh SA10 1 1 1 X X X 70000h-7FFFFh 38000h-3FFFFh |
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