l-fw32206t100 ETC-unknow, l-fw32206t100 Datasheet - Page 19

• Manufacturer Part Number: l-fw32206t100
• Description: 1394a Phy/link Open Host Controller
• Manufacturer: ETC-unknow

Data Sheet, Rev. 1
December 2005
Pin Information
Table 1. Pin Descriptions (continued)
* Active-low signals within this document are indicated by an N following the symbol names.
Agere Systems Inc.
Pin
81
82
83
84
85
86
87
88
89
90
91
92
TPBIAS1
TPBIAS0
Symbol*
PLLV
PLLV
TPB0–
TPB0+
TPA0–
TPA0+
V
V
R0
R1
DDA
SSA
DD
SS
(continued)
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Type
—
—
—
—
I
Port 1, Twisted-Pair Bias. TPBIAS1 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. When the FW322’s 1394 port pins are not
wired to a connector, the unused port pins may be left unconnected.
Internal connect-detect circuitry will keep the port in a disconnected
state.
Port 0, Port Cable Pair B. TPB0± is the port B connection to the
twisted-pair cable. Board traces from each pair of positive and nega-
tive differential signal pins should be kept matched and as short as
possible to the external load resistors and to the cable connector.
When the FW322’s 1394 port pins are not wired to a connector, the
unused port pins may be left unconnected. Internal connect-detect
circuitry will keep the port in a disconnected state.
Port 0, Port Cable Pair A. TPA0± is the port A connection to the
twisted-pair cable. Board traces from each pair of positive and nega-
tive differential signal pins should be kept matched and as short as
possible to the external load resistors and to the cable connector.
When the FW322’s 1394 port pins are not wired to a connector, the
unused port pins may be left unconnected. Internal connect-detect
circuitry will keep the port in a disconnected state.
Port 0, Twisted-Pair Bias. TPBIAS0 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. When the FW322’s 1394 port pins are not
wired to a connector, the unused port pins may be left unconnected.
Internal connect-detect circuitry will keep the port in a disconnected
state.
Analog Circuit Ground. All V
a low-impedance ground plane.
Analog Circuit Power. V
the device.
Current Setting Resistor. An internal reference voltage is applied to
a resistor connected between R0 and R1 to set the operating current
and the cable driver output current. A low temperature-coefficient
resistor (TCR) with a value of 2.49 kΩ ± 1% should be used to meet
the IEEE 1394 -1995 standard requirements for output voltage limits.
Power for PLL Circuit. PLLV
portion of the device.
Ground for PLL Circuit. PLLV
plane.
1394a PCI PHY/Link Open Host Controller
DDA
Description
supplies power to the analog portion of
DD
SSA
SS
supplies power to the PLL circuitry
is tied to a low-impedance ground
signals should be tied together to
FW322 06 T100
19