l-fw32206t100 ETC-unknow, l-fw32206t100 Datasheet - Page 18

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

FW322 06 T100
1394a PCI PHY/Link Open Host Controller
Pin Information
Table 1. Pin Descriptions (continued)
* Active-low signals within this document are indicated by an N following the symbol names.
18
18
Pin
71
72
73
74
75
76
77
78
79
80
Symbol*
TPB1–
TPB1+
TPA1–
TPA1+
V
V
V
PC2
CPS
V
DDA
SSA
SSA
DD
(continued)
Analog I/O
Analog I/O
Type
—
—
—
—
I
I
Power-Class Indicator. On hardware reset (RESETN), this input
sets the default value of the least significant bit in the Power Class
field (Pwr) in the SelfID packet (see Section 4.3.4.1 of the 1394 a-
2000 Specification). This bit can be tied to V
V
characteristics. The two most significant Pwr bits in the SelfID are
internally set to zero. As an example, for a Pwr field value of 001,
PC2 = 1.
Digital Power.
Cable Power Status. CPS is normally connected to the cable
power through a 400 kΩ resistor. This circuit drives an internal
comparator that detects the presence of cable power. This informa-
tion is maintained in one internal register and is available to the
LLC by way of a register read (see IEEE 1394 a-2000, Standard for
a High Performance Serial Bus, Sections 4.2.2.7 and 5B.1).
Note: This pin can be left unconnected for applications that do not
Analog Circuit Ground. All V
to a low-impedance ground plane.
Analog Circuit Power. V
of the device.
Analog Circuit Ground. All V
a low-impedance ground plane.
Port 1, Port Cable Pair B. TPB1± 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 1, Port Cable Pair A. TPA1± 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.
SS
(low) as required for particular power consumption and source
use 1394 bus power (VP). When this pin is grounded, the
PWR_FAIL bit in PHY register 0101
DDA
Description
SSA
supplies power to the analog portion
SSA
signals should be tied together to
signals should be tied together
2
will set.
DD
Data Sheet, Rev. 1
(high) or to
December 2005
Agere Systems Inc.