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AM29PDL128G35PEFN データシート(PDF) 46 Page - Advanced Micro Devices |
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AM29PDL128G35PEFN データシート(HTML) 46 Page - Advanced Micro Devices |
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46 / 71 page ![]() October 28, 2004 Am29PDL128G 45 P R E L IM IN A R Y Legend: DYB = Dynamic Protection Bit SSA = SecSi Sector Address (A6:A0) is (0011010). PD[3:0] = Program Data. Password written as four 16-bit sections. PPB = Persistent Protection Bit PWA = Password Address. A0:A-1 selects portion of password. PWD = Password Data being verified. PL = Password Protection Mode Lock Address (A5:A0) is (001010) RD(0) = Read Data DQ0 for protection indicator bit. RD(1) = Read Data DQ1 for PPB Lock bit status. SA = Sector Address where security command applies. Address bits A21:A11 uniquely select any sector. SL = Persistent Protection Mode Lock Address (A5:A0) is (010010) WP = PPB Address (A6:A0) is (0111010) (Note 16) EP = PPB Erase Address (A6:A0) is (1111010) (Note 16) X = Don’t care PPMLB = Password Protection Mode Locking Bit SPMLB = Persistent Protection Mode Locking Bit 1. See Table 1 for description of bus operations. 2. All values are in hexadecimal. 3. Shaded cells in the table denote read cycles. All other cycles are write operations. 4. During unlock and command cycles, when lower address bits are 555 or AAAh as shown in the table, address bits higher than A11 (except where BA is required) and data bits higher than DQ7 are don’t cares. 5. Reset command returns device to reading array. 6. Cycle 4 programs addressed locking bit. Cycles 5 and 6 validate the bit has been fully programmed when DQ0 = 1. If DQ0 = 0 in cycle 6, the program command must be issued and verified again. 7. Data is latched on rising edge of WE#. 8. Entire command sequence must be executed for each portion of password. 9. Command sequence returns FFh if PPMLB is set. 10. Password is written over four consecutive cycles, at addresses 0-3. 11. A 2 µs timeout is required between any two portions of password. 12. A 100 µs timeout is required between cycles 4 and 5. 13. A 1.2 ms timeout is required between cycles 4 and 5. 14. Cycle 4 erases all PPBs. Cycles 5 and 6 validate bits have been fully erased when DQ0 = 0. If DQ0 = 1 in cycle 6, erase command must be issued and verified again. Before issuing erase command, all PPBs should be programmed to prevent PPB overerasure. 15. DQ1 = 1 if PPB locked, 0 if unlocked. 16. For all other parts that use the Persistent Protection Bit (excluding PDL640G), the WP address is 00000010 and the EP address is 01000010. Table 17. Sector Protection Command Definitions (x16 Mode) Command (Notes) Bus Cycles (Notes 1, 2, 3, and 4) Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Reset 1 XXX F0 SecSi Sector Entry 3 AAA AA 555 55 (BA)AAA 88 SecSi Sector Exit 4 AAA AA 555 55 (BA)AAA 90 XX 00 SecSi Protection Bit Program (5, 6) 6 AAA AA 555 55 (BA)AAA 60 SSA 68 SSA 48 XX RD(0) Password Program (5, 7, 8) 4 AAA AA 555 55 AAA 38 XX[0-3] PD[0-3] Password Verify (8, 9) 4 AAA AA 555 55 AAA C8 PWA[0-3] PWD[0-3] Password Unlock (7, 10, 11) 4 AAA AA 555 55 AAA 28 PWA[0-3] PWD[0-3] PPB Program (6, 12) 6 AAA AA 555 55 AAA 60 (SA)WP 68 (SA)WP 48 (SA)WP RD(0) All PPB Erase (13, 14) 6 AAA AA 555 55 AAA 60 (SA)EP 60 (SA)EP 40 (SA)WP RD(0) PPB Lock Bit Set 3 AAA AA 555 55 AAA 78 PPB Lock Bit Status (15) 4 AAA AA 555 55 AAA 58 SA RD(1) DYB Write (7) 4 AAA AA 555 55 AAA 48 SA X1 DYB Erase (7) 4 AAA AA 555 55 AAA 48 SA X0 DYB or PPB Status 4 AAA AA 555 55 AAA 58 SA RD(0) PPMLB Program (5, 6, 12) 6 AAA AA 555 55 AAA 60 PL 68 PL 48 XX RD(0) PPMLB Status (5) 4 AAA AA 555 55 AAA 60 PL RD(0) SPMLB Program (5, 6, 12) 6 AAA AA 555 55 AAA 60 SL 68 SL 48 XX RD(0) SPMLB Status (5) 4 AAA AA 555 55 AAA 60 SL RD(0) |
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