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IDT SMBus Interfaces
Notes
PES4T4 User Manual
SMBus I/O
Expander
Type
Bit
10 (I/O-1.2)
I
11 (I/O-1.3)
I
12 (I/O-1.4)
O
13 (I/O-1.5)
O
14 (I/O-1.6)
O
15 (I/O-1.7)
O
1.
I/O-x.y corresponds to the notation used for PCA9555 port x I/O pin y.
I/O Expander 1
SMBus I/O
Expander
Type
Bit
1
0 (I/O-0.0)
I
1 (I/O-0.1)
I
2 (I/O-0.2)
I
3 (I/O-0.3)
I
4 (I/O-0.4)
O
5 (I/O-0.5)
O
6 (I/O-0.6)
O
7 (I/O-0.7)
O
8 (I/O-1.0)
I
9 (I/O-1.1)
I
10 (I/O-1.2)
I
11 (I/O-1.3)
I
12 (I/O-1.4)
O
13 (I/O-1.5)
O
14 (I/O-1.6)
O
15 (I/O-1.7)
O
1.
I/O-x.y corresponds to the notation used for PCA9555 port x I/O pin y.
Signal
P4PFN
Port 4 power fault input
P4MRLN
Port 4 manually-operated retention latch (MRL)
input
P4AIN
Port 4 attention indicator output
P4PIN
Port 4 power indicator output
P4PEP
Port 4 power enable output
P4ILOCKP
Port 4 electromechanical interlock
Table 6.5 I/O Expander 0 Signals (Part 2 of 2)
Signal
P3APN
Port 3 attention push button input
P3PDN
Port 3 presence detect input
P3PFN
Port 3 power fault input
P3MRLN
Port 3 manually-operated retention latch (MRL)
input
P3AIN
Port 3 attention indicator output
P3PIN
Port 3 power indicator output
P3PEP
Port 3 power enable output
P3ILOCKP
Port 3 electromechanical interlock
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Table 6.6 I/O Expander 1 Signals
6 - 9
Description
Description
February 1, 2011
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