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AM42BDS640AGBD9IS 데이터시트(PDF) 5 Page - SPANSION |
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5 / 72 page 4 Am42BDS640AG November 1, 2002 P R E L I M INARY Figure 24. Alternate Synchronous Program Operation Timings ..... 54 Figure 25. Chip/Sector Erase Command Sequence ....................... 55 Figure 26. Accelerated Unlock Bypass Programming Timing......... 56 Figure 27. Data# Polling Timings (During Embedded Algorithm) ... 57 Figure 28. Toggle Bit Timings (During Embedded Algorithm)......... 57 Figure 29. Synchronous Data Polling Timings/Toggle Bit Timings . 58 Figure 30. Latency with Boundary Crossing ................................... 59 Figure 31. Latency with Boundary Crossing into Program/Erase Bank ................................................................ 60 Figure 32. Example of Wait States Insertion (Standard Handshaking Device) ...................................................................... 61 Figure 33. Back-to-Back Read/Write Cycle Timings ....................... 62 SRAM AC Characteristics . . . . . . . . . . . . . . . . . . 63 Read Cycle ............................................................................. 63 Figure 34. SRAM Read Cycle—Address Controlled....................... 63 Figure 35. SRAM Read Cycle ......................................................... 64 Write Cycle ............................................................................. 65 Figure 36. SRAM Write Cycle—WE# Control ................................ 65 Figure 37. SRAM Write Cycle—CE1#s Control ............................. 66 Figure 38. SRAM Write Cycle—UB#s and LB#s Control ............... 67 Flash Erase And Programming Performance . 68 Flash Latchup Characteristics. . . . . . . . . . . . . . . 68 Package Pin Capacitance . . . . . . . . . . . . . . . . . . 68 Flash Data Retention . . . . . . . . . . . . . . . . . . . . . . 68 SRAM Data Retention . . . . . . . . . . . . . . . . . . . . . 69 Figure 39. CE1#s Controlled Data Retention Mode....................... 69 Figure 40. CE2s Controlled Data Retention Mode......................... 69 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 70 FSC093—93-Ball Fine-Pitch Grid Array 8 x 11.6 mm ............ 70 Revision Summary . . . . . . . . . . . . . . . . . . . . . . . . 71 Revision A (May 20, 2002) ..................................................... 71 |
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