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參數(shù)資料
| 型號： | FW803-09-DB |
| 英文描述： | PHY IEEE 1394A Three-Cable Transceiver/Arbiter Device |
| 中文描述： | PHY的IEEE 1394A端口三線收發(fā)器/仲裁器裝置 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 395K |
| 代理商： | FW803-09-DB |
Agere Systems Inc.
9
Data Sheet, Rev. 3
June 2001
Three-Cable Transceiver/Arbiter Device
FW803 PHY
IEEE
1394A
34
TPB0+
Analog I/O
Portn, Port Cable Pair B.
TPBn is the port B connection to the twisted-
pair cable. Board traces from each pair of positive and negative differen-
tial signal pins should be kept matched and as short as possible to the
external load resistors and to the cable connector.
39
TPB1+
45
TPB2+
33
TPB0
Analog I/O
Portn, Port Cable Pair B.
TPBn is the port B connection to the twisted-
pair cable. Board traces from each pair of positive and negative differen-
tial signal pins should be kept matched and as short as possible to the
external load resistors and to the cable connector.
38
TPB1
44
TPB2
37
TPBIAS0
Analog I/O
Portn, Twisted-Pair Bias.
TPBIAS provides the 1.86 V nominal bias
voltage needed for proper operation of the twisted-pair cable drivers and
receivers and for sending a valid cable connection signal to the remote
nodes.
42
TPBIAS1
48
TPBIAS2
7, 17,
26, 27, 62
30, 31,
43, 50, 51
2, 14,
25, 56, 64
32, 49,
52, 53
59
V
DD
—
Digital Power.
V
DD
supplies power to the digital portion of the device.
V
DDA
—
Analog Circuit Power.
V
DDA
supplies power to the analog portion of the
device.
Digital Ground.
All V
SS
signals should be tied to the low-impedance
ground plane.
Analog Circuit Ground.
All V
SSA
signals should be tied together to a low-
impedance ground plane.
Crystal Oscillator.
XI and XO connect to a 24.576 MHz parallel resonant
fundamental mode crystal. Although, when a 24.576 MHz clock source is
used, it can be connected to XI with XO left unconnected. The optimum
values for the external shunt capacitors are dependent on the specifica-
tions of the crystal used. It is suggested that two 12 pF shunt capacitors
be used for a crystal with a specified
7
pF loading capacitance. For more
details, see Crystal Selection Considerations in the Application Informa-
tion section.
V
SS
—
V
SSA
—
XI
—
60
XO
Signal Information
(continued)
Table 1. Signal Descriptions
(continued)
Pin
Signal
*
Type
Name/Description
* Active-low signals are indicated by “/” at the beginning of signal names, within this document.
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