s1r72900 Epson Electronics America, Inc., s1r72900 Datasheet - Page 12

• Manufacturer Part Number: s1r72900
• Description: Physical Layer Ic Compliant With The Ieee 1394-1995 And Ieee 1394a-2000 Standards.
• Manufacturer: Epson Electronics America, Inc.

S1R72900F00A
8
XTEST_MODE
XRST
CPS
BNC
FC0
FC1
XI
XO
TEST0
TEST1
Pin name
Test pin
Connect this pin to V
operation.
Reset pin
The SIR72900F00A is initialized when
this pin is set to 0.
After turning on the power supply,
for at least 2ms, maintain XRST = 0.
Set this pin to 1 during normal operation.
Cable Power Status detection pin
Connect this pin to the cable power
through a 240k resistor.
Also, connect a diode (VF = 0.4V)
between the PHY-V
Signal indicating the cable status.
Outputs HIGH when all the ports do not
receive bias voltage from the node on
the other side.
Connection pin for PLL filter
The SIR72900F00A does not need
external capacitor. Set this pin to open.
Connection pin for PLL filter
The SIR72900F00A does not need
external capacitor. Set this pin to open.
Pin for a 24.576MHz crystal oscillator
Pin for a 24.576MHz crystal oscillator
Test pin
Connect this pin to V
operation.
Test pin
Connect this pin to V
operation.
Function
DD
DD
SS
SS
.
during normal
during normal
during normal
EPSON
Hysteresis
Pin No.
27
53
54
55
59
60
28
29
3
Hysteresis
Pin typ.
Analog
Analog
CMOS
CMOS
CMOS
CMOS
I
I/O
Rev. 1.0
O
O
O
I
I
I
I