IDT SMBus Interfaces
PES24N3A User Manual
6 - 10
April 10, 2008
Notes
I/O Expander 2
I/O Expander 4
SMBus I/O
Expander
Bit
Type
Signal
Description
0 (I/O-0.0)
1
1.
I/O-x.y corresponds to the notation used for PCA9555 port x I/O pin y.
I
Reserved
Tie high
1 (I/O-0.1)
I
Reserved
Tie high
2 (I/O-0.2)
I
Reserved
Tie high
3 (I/O-0.3)
I
Reserved
Tie high
4 (I/O-0.4)
O
Reserved
Tie high or low
5 (I/O-0.5)
O
Reserved
Tie high or low
6 (I/O-0.6)
O
Reserved
Tie high or low
7 (I/O-0.7)
O
Reserved
Tie high or low
8 (I/O-1.0)
I
Reserved
Tie high
9 (I/O-1.1)
I
Reserved
Tie high
10 (I/O-1.2)
I
P2PWRGDN
Port 2 power good input
11 (I/O-1.3)
I
Reserved
Tie high
12 (I/O-1.4)
I
P4PWRGDN
Port 4 power good input
13 (I/O-1.5)
I
Reserved
Tie high or low
14 (I/O-1.6)
I
Reserved
Tie high or low
15 (I/O-1.7)
I
Reserved
Tie high or low
Table 6.6 I/O Expander 2 Signals
SMBus I/O
Expander
Bit
Type
Signal
Description
0 (I/O-0.0)
1
O
P0LINKUPN
Port 0 link up status output
1 (I/O-0.1)
O
Reserved
Tie high or low
2 (I/O-0.2)
O
P2LINKUPN
Port 2 link up status output
3 (I/O-0.3)
O
Reserved
Tie high or low
4 (I/O-0.4)
O
P4LINKUPN
Port 4 link up status output
5 (I/O-0.5)
O
Reserved
Tie high or low
6 (I/O-0.6)
O
Reserved
Tie high or low
7 (I/O-0.7)
O
Reserved
Tie high or low
8 (I/O-1.0)
O
P0ACTIVEN
Port 0 activity output
9 (I/O-1.1)
O
Reserved
Tie high or low
Table 6.7 I/O Expander 4 Signals
Summary of Contents for 89HPES24N3A
Page 10: ...IDT Table of Contents PES24N3A User Manual iv April 10 2008 Notes...
Page 12: ...IDT List of Tables PES24N3A User Manual vi April 10 2008 Notes...
Page 14: ...IDT List of Figures PES24N3A User Manual viii April 10 2008 Notes...
Page 18: ...IDT Register List PES24N3A User Manual xii April 10 2008 Notes...
Page 64: ...IDT Link Operation PES24N3A User Manual 4 8 April 10 2008 Notes...
Page 88: ...IDT Power Management PES24N3A User Manual 7 4 April 10 2008 Notes...
Page 160: ...IDT Configuration Registers PES24N3A User Manual 9 66 April 10 2008 Notes...
