参数资料
型号: PH28F128W18BD60A
厂商: INTEL CORP
元件分类: PROM
英文描述: 8M X 16 FLASH 1.8V PROM, 60 ns, PBGA56
封装: 9 X 11 MM, 1 MM HEIGHT, LEAD FREE, VFBGA-56
文件页数: 62/106页
文件大小: 1496K
代理商: PH28F128W18BD60A
Intel
Wireless Flash Memory (W18)
Datasheet
Intel Wireless Flash Memory (W18)
07-Dec-2005
Order Number: 290701, Revision: 015
59
9.3
Command Sequencing
When issuing a 2-cycle write sequence to the flash device, a read operation is allowed to occur
between
the two write cycles. The setup phase of a 2-cycle write sequence places the addressed
partition into read-status mode, so if the same partition is read before the second “confirm” write
cycle is issued, Status Register data will be returned. Reads from other partitions, however, can
return actual array data assuming the addressed partition is already in read-array mode. Figure 23
and Figure 24 illustrate these two conditions.
By contrast, a write bus cycle may not interrupt a 2-cycle write sequence. Doing so causes a
command sequence error to appear in the Status Register. Figure 25 illustrates a command
sequence error.
Figure 23.
Normal Write and Read Cycles
Figure 24.
Interleaving a 2-Cycle Write Sequence with an Array Read
Partition A
20h
D0h
FFh
Block Erase Setup
Block Erase Conf irm
Read Array
Address [A]
WE# [W]
OE# [G]
Data [Q]
Partition B
Partition A
Partition B
Partition A
FFh
20h
Array Data
D0h
Read Array
Erase Set up
Bus Read
Erase Conf irm
Address [A]
WE# [W]
OE# [G]
Data [Q]
Figure 25.
Improper Command Sequencing
Partiti on X
Partiti o n Y
Parti tion X
20h
FFh
D0h
SR Data
Address [A]
WE# [W]
OE# [G]
Data [D/Q]
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