參數(shù)資料
型號: AMMCL00XA
廠商: Advanced Micro Devices, Inc.
英文描述: JT 3C 3#20 SKT RECP
中文描述: 2或4兆字節(jié)3.0伏,只有Flash微型卡
文件頁數(shù): 12/36頁
文件大?。?/td> 172K
代理商: AMMCL00XA
12
AmMCL00XA
P R E L I M I NA R Y
changed. While in sleep mode, output data is latched
and always available to the system.
Command Definitions
Each memory device contains a command register,
which is a latch that saves address, commands, and
data information used by the state machine and
memory array. The state machine is active when V
CC
is
greater than V
LKO
(2.3 - 2.5 V). This is required for valid
program and erase operations.
When Write Enable (WE#) and appropriate CE#
signals are at a logic-low level, and Output Enable
(OE#) is at a logic-high, the command register is
enabled for write operations. The falling edge of WE#
or CE#, whichever occurs later, latches address infor-
mation and the rising edge of WE# or CE#, whichever
occurs first, latches data/command information.
Commands are accomplished by writing non-specific
address and specific data sequences into the com-
mand register of accessed Flash memory devices.
Writing incorrect address and data values or writ-
ing them in the improper sequence will reset the
device to the read mode.
The byte-wide commands are defined in Tables 6 and
7; word-wide commands are defined in Table 5. Note
that the Erase Suspend (B0h) and Erase Resume
(30h) commands are valid only while the Sector Erase
operation is in progress.
Autoselect Operation
A host system or external card reader/writer can deter-
mine the on-card manufacturer and device I.D. codes.
Codes are available after writing the 90h command to
the command register of a memory device, as shown in
Tables 5 through 7. When the autoselect command is
issued to card address 00000h, the Miniature Card
returns the manufacturer I.D. If the autoselect
command is issued to card address 00001h, the Minia-
ture Card provides the device I.D.
To terminate the autoselect operation, the Read/Reset
command sequence must be written to the same
device. The Autoselect command operates only if the
card is not write protected.
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