參數(shù)資料
型號(hào)： DM6381F
廠商： Electronic Theatre Controls, Inc.
英文描述： V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set
中文描述： .34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)： 20/40頁(yè)
文件大?。?/td> 341K
代理商： DM6381F
DM336P
V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set
20
Final
Version: DM336P-DS-F02
August 15, 2000
(10) Reading Resource Data
Each PnP card supports a resource data structure
stored in a non-volatile device (e.g. 9346) 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.
DM6383 Absolute Maximum Ratings*
*Comments
Power Supply Voltage........................-0.5V to +7.0V
Case Operating Temperature............... 0 oC to 85 oC
Storage Temperature......................-65 oC to 150 oC
Applied Voltage On Any Pin.....................................
.........................................- 0.5V
≤
VIN
≤
VDD+0.5V
Stresses above those listed under "Absolute
Maximum Ratings" may cause permanent damage to
this device. These are stress ratings only. Functional
operation of this device at these or any other
conditions above those indicated in the operational
sections of this specification is not implied or
intended. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
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