s1r72900 Epson Electronics America, Inc., s1r72900 Datasheet - Page 34

• 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
7.4 Link Layer Controller Interface
7.4.1 Connection
The SIR72900F00A can connect to a Link layer controller IC regardless of the existence of an isolation barrier.
For DC connection, connect the DIRECT pin to V
The SIR72900F00A has a bus holder circuit on the interface pin for the Link layer controller IC. This enables AC
connection as shown in Figure 7.14.
For AC connection (with a single capacitor), also connect the DIRECT pin to V
30
Figure 7.13 SIR72900F00A -to-Link chip connection diagram (DC connection)
Figure 7.14 SIR72900F00A -to-Link chip connection diagram (AC connection)
Link
Link
DD
V
V
DD
DD
LINKON
LINKON
CTL[0:1]
CTL[0:1]
EPSON
as shown in Figure 7.13.
SCLK
LREQ
D[0:7]
SCLK
LREQ
D[0:7]
LPS
LPS
DIRECT
DIRECT
S1R72900
S1R72900
DD
PHY
PHY
.
Rev. 1.0