參數(shù)資料
型號: 7P512CFA4500C25
廠商: WHITE ELECTRONIC DESIGNS CORP
元件分類: PROM
英文描述: 256M X 16 FLASH 3V PROM CARD, 250 ns, XMA50
封裝: CARD-50
文件頁數(shù): 30/32頁
文件大?。?/td> 264K
代理商: 7P512CFA4500C25
7
White Electronic Designs Corporation (508) 485-4000 www.whiteedc.com
White Electronic Designs
CompactFlashTM Cards
CFA45 Series
COMMAND REGISTER
DIRECTION - This register is write-only by host.
ACCESS RESTRICTION - This register is write-only when BSY and DRQ are both equal to zero. The contents of this
register and all other Command Block registers are not valid while a device is in the Sleep mode.
FUNCTIONAL DESCRIPTION - This register contains the command code being sent to the device. Command
execution begins immediately after this register is written.
BIT DESCRIPTION
7
6
5
4
321
0
Command Code
ERROR REGISTER
DIRECTION - This register is read-only by host.
ACCESS RESTRICTION - The contents of this register shall be valid when BSY and DRQ are equal to zero and ERR
is asserted.
FUNCTIONAL DESCRIPTION - This register contains the operation status for the current command.
BIT DESCRIPTION
7
6
5
4
321
0
R
UNC
MC
IDNF
MCR
ABRT
TKONF
AMNF
BIT 0
AMNF (Address Mark Not Found) indicates the data address mark has not been found after finding the correct
ID field.
BIT 1
TKONF (Track 0 Not Found) indicates the track 0 has not been found during a RECALIBRATE command.
BIT 2
ABRT (Aborted Command) indicates the requested command has been aborted because the command code or a
command parameter is invalid or some other error has occurred.
BIT 3
MCR (Media Change Requested) is used by removable media devices.
BIT 4
IDNF (ID Not Found) indicates the requested sectors ID field could not be found.
BIT 5
MC (Media Change) is used by removable media devices.
BIT 6
UNC (Uncorrectable Data Error) indicate an uncorrectable data error has been encountered.
BIT 7
Reserved
FEATURE REGISTER
DIRECTION - This register is write-only by host.
ACCESS RESTRICTION - This register is write-only when BSY and DRQ are both equal to zero.
FUNCTIONAL DESCRIPTION - This register is command specific.
BIT DESCRIPTION
7
6
5
4
321
0
Command Specific
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