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| 型號(hào)： | RD28F6408W30T85 |
| 廠商： | INTEL CORP |
| 元件分類： | 存儲(chǔ)器 |
| 英文描述： | 1.8 Volt Intel Wireless Flash Memory with 3 Volt I/O and SRAM (W30) |
| 中文描述： | SPECIALTY MEMORY CIRCUIT, PBGA80 |
| 封裝： | 14 X 8 MM, 0.80 MM PITCH, STACK, CSP-80 |
| 文件頁(yè)數(shù)： | 74/82頁(yè) |
| 文件大?。?/td> | 749K |
| 代理商： | RD28F6408W30T85 |
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28F6408W30, 28F3204W30, 28F320W30, 28F640W30
68
Preliminary
Appendix C Common Flash Interface
This appendix defines the data structure or
“
database
”
returned by the Common Flash Interface
(CFI) Query command. System software should parse this structure to gain critical information
such as block size, density, x8/x16, and electrical specifications. Once this information has been
obtained, the software will know which command sets to use to enable flash writes, block erases,
and otherwise control the flash component. The Query is part of an overall specification for
multiple command set and control interface descriptions called Common Flash Interface, or CFI.
C.1
Query Structure Output
The Query database allows system software to obtain information for controlling the flash device.
This section describes the device
’
s CFI-compliant interface that allows access to Query data.
Query data are presented on the lowest-order data outputs (DQ0-7) only. The numerical offset
value is the address relative to the maximum bus width supported by the device. On this family of
devices, the Query table device starting address is a 10h, which is a word address for x16 devices.
For a word-wide (x16) device, the first two Query-structure bytes, ASCII
“
Q
”
and
“
R,
”
appear on
the low byte at word addresses 10h and 11h. This CFI-compliant device outputs 00h data on upper
bytes. The device outputs ASCII
“
Q
”
in the low byte (DQ
0-7
) and 00h in the high byte (DQ
8-15
).
At Query addresses containing two or more bytes of information, the least significant data byte is
presented at the lower address, and the most significant data byte is presented at the higher address.
In all of the following tables, addresses and data are represented in hexadecimal notation, so the
“
h
”
suffix has been dropped. In addition, since the upper byte of word-wide devices is always
“
00h,
”
the leading
“
00
”
has been dropped from the table notation and only the lower byte value is
shown. Any x16 device outputs can be assumed to have 00h on the upper byte in this mode.
Table C1. Summary of Query Structure Output as a Function of Device and Mode
Table C2. Example of Query Structure Output of x16- and x8 Devices
Word Addressing:
Offset
Hex Code
A
–
A
00010h
0051
00011h
0052
00012h
0059
00013h
P_ID
00014h
P_ID
00015h
P
00016h
P
00017h
A_ID
LO
00018h
A_ID
HI
...
...
Device
Hex
Offset
00010:
00011:
00012:
Hex
Code
51
52
59
ASCII
Value
"Q"
"R"
"Y"
Device Addresses
Byte Addressing:
Hex Code
Value
Offset
A
–
A
00010h
00011h
00012h
00013h
00014h
00015h
00016h
00017h
00018h
...
Value
D
–
D
D
–
D
"Q"
"R"
"Y"
51
52
59
"Q"
"R"
"Y"
PrVendor
ID #
PrVendor
TblAdr
AltVendor
ID #
...
P_ID
P_ID
P_ID
...
PrVendor
ID #
ID #
...
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