upd72872 Renesas Electronics Corporation., upd72872 Datasheet - Page 17

• Manufacturer Part Number: upd72872
• Description: Ieee1394 1-chip Ohci Host Controller
• Manufacturer: Renesas Electronics Corporation.

2.2 Port Status Page (Page 000)
AStat
BStat
Child
Connected
Bias
Disabled
Negotiated_
speed
Int_enable
Fault
Reserved
1000
1001
1010
1011
1100
1101
1110
1111
Field
0
Size
2
2
1
1
1
1
3
1
1
-
AStat
Negotiated_speed
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
1
Reset value
Description
000…
See
XX
XX
0
0
0
Table 2-2. Bit Field Description
Figure 2-2. Port Status Page
2
Data Sheet S14793EJ1V0DS
A port status value.
B port status value.
Child node status value.
Connection status value.
Bias voltage status value.
The reset value is set by the PORTDIS pin.
Shows the maximum data transfer rate of the node connected to this port.
The Port_event is set to 1 by a change to 1 of the Connected, Bias, Disable,
and Fault bits.
Set to 1 if an error occurs during Suspend/Resume.
Writing 1 to this bit clears it to 0.
Writing 0 has no effect.
Reserved. Read as 0.
00:---, 10: “0”
01: “1”, 11: “Z”
00:---, 10: “0”
01: “1”, 11: “Z”
1: Connected to child node
0 : Connected to parent node
1: Connected
0: Disconnected
1: Bias voltage
0: No bias voltage
1: Disable
000: 100 Mbps
001: 200 Mbps
010: 400 Mbps
BStat
Int_enable
3
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Child
Fault
4
Description
Connected
5
Reserved
Bias
6
Disabled
7
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