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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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PC48F4400PLVB0 数据表(PDF) 67 Page - Numonyx B.V |
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PC48F4400PLVB0 数据表(HTML) 67 Page - Numonyx B.V |
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67 / 102 page  November 2007 Datasheet Order Number: 290701-18 67 Numonyx™ Wireless Flash Memory (W18) 12.2 Block Erase The 2-cycle block erase command sequence, consisting of Erase Setup (20h) and Erase Confirm (D0h), initiates one block erase at the addressed block. Only one partition can be in an erase mode at a time; other partitions must be in a read mode. The Erase Confirm command internally latches the address of the block to be erased. Erase forces all bits within the block to 1. SR[7] is cleared while the erase executes. After writing the Erase Confirm command, the selected partition is placed in read Status Register mode and reads performed to that partition return the current status data. The address given during the Erase Confirm command does not need to be the same address used in the Erase Setup command. So, if the Erase Confirm command is given to partition B, then the selected block in partition B will be erased even if the Erase Setup command was to partition A. Figure 29: Erase Suspend / Resume Flowchart Erase Completed Write FFh Erased Partition Read Array Data 0 0 No Read 1 Program Program Loop Read Array Data 1 Yes Start Write B0h Any Address Read Status Register SR.7 = SR.6 = Write D0h Any Address Erase Resumed Read or Program? Done? Write Write Standby Standby Write Erase Suspend Read Array or Program Program Resume Data = B0h Addr = Any address Data = FFh or 40h Addr = Block to program or read Check SR.7 1 = WSM ready 0 = WSM busy Check SR.6 1 = Erase suspended 0 = Erase completed Data = D0h Addr = Any address Bus Operation Command Comments Read Status register data. Toggle CE# or OE# to update Status register Addr = Same partition Read or Write Read array or program data from/to block other than the one being erased ERASE SUSPEND / RESUME PROCEDURE ERAS_SUS.WMF Write 70h Same Partition Write Read Status Data = 70h Addr = Same partition Erase Resume Erase Suspend Read Status Read Array Write 70h Same Partition Read Status If the suspended partition was placed in Read Array mode or a Program Loop: Write Read Status Return partition to Status mode: Data = 70h Addr = Same partition |
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