參數(shù)資料
型號(hào)： GE28F640W30TD70
廠商： INTEL CORP
元件分類： PROM
英文描述： 4M X 16 FLASH 1.8V PROM, 70 ns, PBGA56
封裝： 0.75 MM PITCH, VFBGA-56
文件頁(yè)數(shù)： 59/104頁(yè)
文件大小： 1443K
代理商： GE28F640W30TD70
28F640W30, 28F320W30, 28F128W30
June 2005
Intel Wireless Flash Memory (W30)
Datasheet
58
Order Number: 290702, Revision: 011
10.3
Read Query (CFI)
The W30 flash memory device contains a separate CFI query database that acts as an on-chip
datasheet. To access the CFI information within the W30 flash memory device, issue the Read
Query command and supply a specific address.
The address is constructed from the base address of a partition plus a particular offset
corresponding to the desired CFI field.
Appendix B, “Common Flash Interface” on page 93 shows accessible CFI fields and their address
offsets. Issuing the Read Query command to a partition that is programming or erasing puts that
partition in read query mode while the partition continues to program or erase in the background.
10.4
Read Status Register
The flash device status register displays program and erase operation status. The status of a
partition can be read after writing the Read Status Register command to any location within the
address range of that partition. Read-status mode is the default read mode following a Program,
Erase, or Lock Block command sequence. Subsequent single reads from that partition return the
partition status until another valid command is written.
The read-status mode supports single synchronous and single asynchronous reads only; it does not
support burst reads.
The first falling edge of OE# or CE# latches and updates Status Register data. The operation does
not affect the modes of other partitions. Because the Status Register is 8 bits wide, only DQ [7:0]
contain valid status register data; DQ [15:8] contain zeros. See Table 21, “Status Register
Block Lock Status(2)
Block
02h
D0 = 0
Block is unlocked
D0 = 1
Block is locked
Block Lock-Down Status(2)
Block
02h
D1 = 0
Block is not locked-down
D1 = 1
Block is locked down
Configuration Register
Partition
05h
Register Data
Protection Register Lock Status
Partition
80h
Lock Data
Protection Register
Partition
81h - 88h
Register Data
Multiple reads required to read
the entire 128-bit Protection
Register.
Notes:
1.
The address is constructed from a base address plus an offset. For example, to read the Block Lock
Status for block number 38 in a BPD, set the address to the BBA (0F8000h) plus the offset (02h),
which in this example is 0F8002h. Then examine bit 0 of the data to determine whether the block is
locked.
2.
Table 20.
Flash Device Identification Codes (Sheet 2 of 2)
Item
Address1
Data
Description
Base
Offset
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