參數(shù)資料
型號： 82802AB
廠商： Intel Corp.
英文描述： Firmware Hub (FWH)
中文描述： 固件集線器（固件樞紐）
文件頁數(shù)： 26/53頁
文件大?。?/td> 471K
代理商： 82802AB
Intel
82802AB/AC Firmware Hub
R
26
Datasheet
Write Lock
The default write status of all blocks upon power-up is write-locked. Any program or erase operations
attempted on a locked block will return an error in the status register (indicating block lock). The status
of the locked block can be changed to unlocked by clearing the write-lock bit, provided the lock-down
bit also is not set. The current write-lock status of a particular block can be determined by reading the
corresponding write-lock bit. The write-lock functions in conjunction with the hardware write-lock pins,
TBL# and WP#. When active, these pins take precedence over the register locking function and write-
lock the top block or remaining blocks, respectively. Reading this register will not read the state of the
TBL# or WP# pin.
Read Lock
The default read status of all blocks upon power-up is read-unlocked. When a block’s read-lock bit is set,
data cannot be read from that block. An attempted read from a read-locked block will result in the data
00h. (Note that failure is not reflected in the status register.) The read-lock status can be unlocked by
clearing the read-lock bit, provided the lock-down bit has not been set. The current read-lock status of a
particular block can be determined by reading the corresponding read-lock bit.
Lock-Down
In the Intel FWH interface mode, the default lock-down status of all blocks upon power-up is not-locked-
down. The lock-down bit for any block may be set, but only once, because future attempts to change that
block-locking register will be ignored. The lock-down bit is cleared only upon a device reset with RST#
or INIT#. The current lock-down status of a particular block can be determined by reading the
corresponding lock-down bit. Once a block’s lock-down bit is set, the read- and write-lock bits for that
block can no longer be modified, and the block is locked-down in its current state of read and write
accessibility.
4.9.2.
General-Purpose Input Register
This register reads the status of the FGPI [4:0] pins on the Intel FWH. Since this is a pass-through
register, there is no default value, only the state of the pins at power-up.
4.9.2.1.
GPI_REG — General-Purpose Input Register
Memory Address:
Default Value:
Access:
Size:
FFBC0100h
N/A
R0
8 bits
Bit
Function
7:5
Reserved
4
FGPI[4].
Reads status of general-purpose input pin (PLCC-30/TSOP-7).
3
FGPI[3].
Reads status of general-purpose input pin (PLCC-3/TSOP-15).
2
FGPI[2].
Reads status of general-purpose input pin (PLCC-4/TSOP-16).
1
FGPI[1].
Reads status of general-purpose input pin (PLCC-5/TSOP-17).
0
FGPI[0].
Reads status of general-purpose input pin (PLCC-6/TSOP-18).
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相關代理商/技術參數(shù)
參數(shù)描述
82802AC 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Firmware Hub (FWH)
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8280-2PG-311 功能描述:標準環(huán)形連接器 MINI-CON CBL-CBL #20 CRIMP RoHS:否 制造商:Hirose Connector 系列:EM-W 產(chǎn)品類型:Accessories 位置/觸點數(shù)量:1 觸點類型: 觸點電鍍: 安裝風格:Cable 外殼材質(zhì): 端接類型:Clamp 電壓額定值:
8280-2PG-315 功能描述:標準環(huán)形連接器 MINI-CON CBL-CBL #20 CRIMP RoHS:否 制造商:Hirose Connector 系列:EM-W 產(chǎn)品類型:Accessories 位置/觸點數(shù)量:1 觸點類型: 觸點電鍍: 安裝風格:Cable 外殼材質(zhì): 端接類型:Clamp 電壓額定值:
8280-2PG-318 功能描述:標準環(huán)形連接器 MINI-CON CBL-CBL #20 CRIMP RoHS:否 制造商:Hirose Connector 系列:EM-W 產(chǎn)品類型:Accessories 位置/觸點數(shù)量:1 觸點類型: 觸點電鍍: 安裝風格:Cable 外殼材質(zhì): 端接類型:Clamp 電壓額定值:
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