- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376776 > DM560P (Electronic Theatre Controls, Inc.) V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set PDF資料下載
參數(shù)資料
| 型號： | DM560P |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set |
| 中文描述： | .90綜合數(shù)據(jù)/傳真/語音/揚聲器調(diào)制解調(diào)器設備集 |
| 文件頁數(shù)： | 23/43頁 |
| 文件大?。?/td> | 242K |
| 代理商： | DM560P |
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頁當前第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頁第43頁
DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
Preliminary
Version: DM560P-DS-P07
August 11, 2000
23
Reading Resource Data
Each PnP card supports a resource data structure
stored in a non-volatile device (e.g. 93C46) that
describes the resources requested by the card. The
Plug and Play resource management software will
arbitrate resources and setup the logical device
configuration registers according to the resource data.
Card resource data may only be read from cards in the
Configuration state. A card may get to the
Configuration state by one of two different methods: 1)
A card enters the Configuration state in response to
the card "winning" the serial isolation protocol and
having a CSN assigned, or 2) the card receives a
Wake[CSN] command that matches the card CSN.
As described above, all Plug and Play cards function
as if both of their serial identifiers and resource data
come from the same serial device. Similarly, the
pointer to the serial device is reset in response to any
Wake[CSN] command. This implies that if a card
enters the Configuration state directly from Sleep state
in response to a Wake[CSN] command, the 9-byte
serial identifier must be read first before the card
resource data is accessed. Then the Vendor ID and
Unique Serial Number is valid. However, the
checksum byte, when read in this way, is not valid. For
a card that enters Configuration state / Isolation state,
the first read of the Resource Data Register will report
resource data.
Card resource data is read by first polling the Status
register and waiting for bit[0] to be set. When this bit is
set, one byte of resource data is ready to be read from
the Resource Data Register. After the Resource Data
Register is read, the Status Register must be polled
before reading the next byte of resource data. This
process will repeat until all resource data is read.
The above operation implies that the hardware is
responsible for accumulating 8 bits of data in the
Resource Data Register. When this operation is
complete, the status bit [0] is set. When a read is
performed on the Resource Data Register, status bit
[0] is cleared, eight more bits are shifted into the
Resource Data Register, and the status bit[0] is set
again.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DM562P | V.90 Intergrated Data/Fax/Voice/Speakephone Modem Device Single Chip with Memory Built in |
| DM6580 | V.90 Intergrated Data/Fax/Voice/Speakephone Modem Device Single Chip with Memory Built in |
| DM6580L | V.90 Intergrated Data/Fax/Voice/Speakephone Modem Device Single Chip with Memory Built in |
| DM6588F | V.90 Intergrated Data/Fax/Voice/Speakephone Modem Device Single Chip with Memory Built in |
| DM5806 | DM5806 DATA MODULE DIGITAL I/O BOARD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DM562AP | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:V.90 Integrated Data/ Fax/Voice/Speakerphone Modem Device Single Chip with Memory Built in |
| DM562AP_07 | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:V.90 Integrated Data/ Fax/Voice/Speakerphone Modem Device Single Chip with Memory Built in |
| DM562P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:V.90 Intergrated Data/Fax/Voice/Speakephone Modem Device Single Chip with Memory Built in |
| DM562P_04 | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:V.90 Integrated Data/ Fax/Voice/Speakerphone Modem Device Single Chip with Memory Built in |
| DM5-680J | 制造商:FLORIDA MISC. 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。