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PF38F5070M0T0B 数据表(PDF) 59 Page - Numonyx B.V |
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PF38F5070M0T0B 数据表(HTML) 59 Page - Numonyx B.V |
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59 / 102 page  November 2007 Datasheet Order Number: 290701-18 59 Numonyx™ Wireless Flash Memory (W18) 11.0 Program Operations 11.1 Word Program When the Word Program command is issued, the WSM executes a sequence of internally timed events to program a word at the desired address and verify that the bits are sufficiently programmed. Programming the flash array changes specifically addressed bits to 0; 1 bits do not change the memory cell contents. Programming can occur in only one partition at a time. All other partitions must be in either a read mode or erase suspend mode. Only one partition can be in erase suspend mode at a time. The Status Register can be examined for program progress by reading any address within the partition that is busy programming. However, while most Status Register bits are partition-specific, the Device WSM Status bit, SR[7], is device-specific; that is, if the Status Register is read from any other partition, SR[7] indicates program status of the entire device. This permits the system CPU to monitor program progress while reading the status of other partitions. CE# or OE# toggle (during polling) updates the Status Register. Several commands can be issued to a partition that is programming: Read Status Register, Program Suspend, Read Identifier, and Read Query. The Read Array command can also be issued, but the read data is indeterminate. After programming completes, three Status Register bits can signify various possible error conditions. SR[4] indicates a program failure if set. If SR[3] is set, the WSM couldn’t execute the Word Program command because VPP was outside acceptable limits. If SR[1] is set, the program was aborted because the WSM attempted to program a locked block. After the Status Register data is examined, clear it with the Clear Status Register command before a new command is issued. The partition remains in Status Register mode until another command is written to that partition. Any command can be issued after the Status Register indicates program completion. If CE# is deasserted while the device is programming, the devices will not enter standby mode until the program operation completes. |
类似零件编号 - PF38F5070M0T0B |
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类似说明 - PF38F5070M0T0B |
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