參數(shù)資料
型號(hào)： 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(yǔ)音/揚(yáng)聲器調(diào)制解調(diào)器設(shè)備集
文件頁(yè)數(shù)： 19/43頁(yè)
文件大?。?/td> 242K
代理商： DM560P
DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
Preliminary
Version: DM560P-DS-P07
August 11, 2000
19
STATE
ISOLATION
ID BIT = "1H"
SD[1:0] = "01"
LEAVE SD[7:0]
NO
GET ONE BIT FROM SERIAL IDENTIFIER
READ FROM SERIAL ISOLATION REGISTER
YES
WAIT FOR NEXT READ FROM SERIAL ISOLATION REGISTER
SD[1:0] = "10"
STATE
YES
ID = 0
READ ALL 72 BITS
DRIVE
AFTER I/O READ COMPLETES
ONE CARD
NO
YES
NO
YES
LEAVE SD[7:0]
NO
DRIVE "55H" ON SD[7:0]
Serial Identifier
The key element of the Plug and Play isolation
protocol is that each card contains a unique number
called a serial identifier. The serial identifier is a 72-bit
unique, non-zero number composed of two 32 bit
fields and an 8-bit checksum.
The first 32-bit field is a vendor identifier. The other
32-bits can be any value, such as a serial number, part
of a LAN address, or a static number, as long as no
two cards in a single system will ever have the same
64-bit number. The serial identifier is accessed bit-
serially by isolation logic, and is used to differentiate
the cards.
Checksum
BYTE
7:0
Serial Number
BYTE BYTE
7:0
7:0
Vendor ID
BYTE
7:0
BYTE
7:0
Table 2. Shifting of Serial Identifier
BYTE BYTE
7:0
BYTE
7:0
BYTE
7:0
7:0
The shift order for all Plug and Play serial isolation and resource data is defined as bit [0, bit [1], and so on through
bit [7].
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