- 您現在的位置：買賣IC網 > PDF目錄378217 > 82802AB (Intel Corp.) Firmware Hub (FWH) PDF資料下載
參數資料
| 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： | 43/53頁 |
| 文件大小： | 471K |
| 代理商： | 82802AB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁當前第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁
Intel
82802AB/AC Firmware Hub
R
Datasheet
43
Clock
Cycle
Field
Name
Field Contents
1
FWH[3:0]
FWH[3:0]
Direction
Comments
16
TAR0
1111
OUT
then float
In this clock cycle, the FWH has driven the bus to all
1s and then floats the bus prior to the next clock
cycle. This is the first part of the bus “turnaround
cycle.”
17
TAR1
1111 (float)
Float then
IN
The master (Intel ICH) resumes control of the bus
during this cycle.
Note:
1. Field contents are valid on the rising edge of the present clock cycle.
5.4.1.4.
Write Waveforms
Figure 11.
Write Waveforms
IMADDR
STR
CLK
FWH[3:0]
FWH4
IDS
IMS
TAR
SYN
C
DATA
TAR
5.4.1.5.
Response To Invalid Fields
During FWH operations, the Intel FWH will not explicitly indicate that it has received invalid field
sequences. The response to specific invalid fields or sequences is as follows:
Address out of range:
The Intel FWH address sequence is 7 fields long (28 bits), but only the last
five address fields (20 bits) will be decoded by an 8-Mbit FWH. (For a 4-Mbit density, the most-
significant bit (FWH3) in the third address field also will be ignored.) The Intel FWH will respond
to these lower addresses, regardless of the value of the more-significant address bits. Address A22
has the special function of directing reads and writes to the flash core (A22 = 1) or to the register
space (A22 = 0).
Invalid IMSIZE field:
If the Intel FWH receives an invalid size field during a read or write
operation, the internal state machine will reset and no operation will be attempted. The Intel FWH
will generate no response of any kind in this situation. Invalid-size fields for a read cycle are
anything but 0000. Invalid-size fields for a write cycle are anything but 0000. When accessing
register space, invalid field sizes are anything but 0000.
Non-page-aligned address:
The Intel FWH assumes that multibyte read addresses are page aligned
(i.e., for a 32-byte access, the lower 5 address bits will be zero). If they are not zero, the first byte
of data returned by the Intel FWH will correspond to that explicit address, and subsequent data will
be as if the first address was indeed page aligned.
Once valid START, IDSEL, and IMSIZE fields are received, the Intel FWH always will respond to
subsequent inputs as if they were valid. As long as the states of FWH [3:0] and FWH4 are known, the
response of the Intel FWH to signals received during the FWH cycle should be predictable. The Intel
FWH will make no attempt to check the validity of incoming flash operation commands.
相關PDF資料 |
PDF描述 |
|---|---|
| 82802AC | Firmware Hub (FWH) |
| 8281 | LNB SUPPLY AND CONTROL-VOLTAGE REGULATORS |
| 8282 | OCTAL LATCH |
| 8282 | LNB SUPPLY AND CONTROL-VOLTAGE REGULATORS |
| 82845G | Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 82802AC | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Firmware Hub (FWH) |
| 82802D | 功能描述:ADPTR LRG HEX DIE 1/2DR 制造商:apex tool group 系列:* 零件狀態(tài):在售 標準包裝:6 |
| 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 產品類型:Accessories 位置/觸點數量:1 觸點類型: 觸點電鍍: 安裝風格:Cable 外殼材質: 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 產品類型:Accessories 位置/觸點數量:1 觸點類型: 觸點電鍍: 安裝風格:Cable 外殼材質: 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 產品類型:Accessories 位置/觸點數量:1 觸點類型: 觸點電鍍: 安裝風格:Cable 外殼材質: 端接類型:Clamp 電壓額定值: |
發(fā)布緊急采購，3分鐘左右您將得到回復。