UPD72850A データシートの表示（PDF） - NEC => Renesas Technology
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UPD72850A Datasheet PDF : 48 Pages
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µPD72850A
2.2 Port Status Page (Page 000)
1000
1001
1010
1011
1100
1101
1110
1111
Figure 2-2. Port Status Page
0
1
AStat
Negotiated_speed
2
3
4
BStat
Child
Int_enable
Fault
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
5
Connected
6
Bias
Reserved
7
Disabled
Field
AStat
BStat
Child
Connected
Bias
Disabled
Negotiated_
Speed
Int_enable
Fault
Reserved
Table 2-2. Bit Field Description
Size R/W Reset value
Description
2
R
XX
A port status value.
00:---, 10: “0”
01: “1”, 11: “Z”
2
R
XX
B port status value.
00:---, 10: “0”
01: “1”, 11: “Z”
1
R
Child node status value.
1: Connected to child node
0: Connected to parent node
1
R
0
Connection status value.
1: Connected
0: Disconnected
1
R
Bias voltage status value.
1: Bias voltage
0: No bias voltage
1 R/W
See
The reset value is set by the PORTDIS pin.
Description
1: Disable
3
R
Shows the maximum data transfer rate of the node connected to this port.
000: 100 Mbps
001: 200 Mbps
010: 400 Mbps
1 R/W
0
The Port_event is set to 1 by a change to 1 of the Connected, Bias, Disable,
and Fault bits.
1 R/W
0
Set to 1 if an error occurs during Suspend/Resume.
Writing 1 to this bit clears it to 0.
Writing 0 has no effect.
-
R
000…
Reserved. Read as 0.
Data Sheet S14452EJ1V0DS00
13
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