參數(shù)資料
型號(hào)： INTEL82802AB
廠商： Intel Corp.
英文描述： Firmware Hub (FWH)
中文描述： 固件集線器（固件樞紐）
文件頁(yè)數(shù)： 22/53頁(yè)
文件大?。?/td> 471K
代理商： INTEL82802AB
Intel
82802AB/AC Firmware Hub
R
22
Datasheet
4.5.
Block Erase Command
The erase command operates on one block at a time. This command requires an (arbitrary) address
within the block to be erased. Recall that erasure changes all block data to FFh. Block preconditioning,
erase, and erase verify are handled internally by the WSM, which is transparent to the system. After
issuing the erase command, the device automatically outputs status register data when read. When the
block erase completes, the status register may be checked. If the FWH detects a block erase error, the
status register should be cleared before system software attempts corrective actions. After a block erase,
the CUI remains in read status register mode until a new command is issued.
Successful block erasure requires that the corresponding block’s write-lock-bit is cleared, and the
corresponding write-protect pin (TBL# or WP#) is inactive. If a block erase is attempted when the block
is locked, the block erase will fail, with the reason for failure in the status register.
Successful block erase only occurs when V
PP
= V
PPH1
or V
PPH2
. If the erase operation is attempted at
V
PP
≠
V
PPH1
or V
PPH2
, erratic results may occur.
4.6.
Program Command
Program command operates on one byte at a time. This command specifies the address and data to be
programmed. After the CUI receives the command, the WSM takes over, controlling the program and
verify algorithms internally. After the program command is written, the device automatically outputs the
status register data when read. When programming is complete, the status register may be checked. If a
program error is detected, the status register should be cleared before corrective action is taken by the
software. The internal WSM verification error checking only detects 1s that does not successfully
program to 0s. The CUI remains in
read status register mode
until it receives another command.
Reliable programming only occurs when V
PP
= V
PPH1
or V
PPH2
. If programming is attempted at
V
PP
≠
V
PPH1
or V
PPH2
, erratic results may occur.
Successful program operation also requires that the corresponding block’s write-lock bit be cleared and
that the corresponding write-protect pin (TBL# or WP#) be inactive. If program operation is attempted
when the block is locked, the operation will fail.
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