LSI S pecification
MB86617A
Rev.1.0
Fujitsu VLSI
90
8.8. Physical register #07, 08, 09 (read)
Physical Register#07, 08, 09 are the registers that indicate signal condition of IEEE1394 port and cable connection condition.
phy/
link-
addr
R/W
Bit
15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
0C h
R
-
-
-
-
-
-
-
-
Astat-0
Bstate-0
Child-
0
Connec
ted-0
-
-
0E h
R
-
-
-
-
-
-
-
-
Astat-1
Bstate-1
Child-
1
Connec
ted-1
-
-
10 h
R
-
-
-
-
-
-
-
-
Astat-2
Bstate-2
Child-
2
Connec
ted-2
-
-
Initial Value
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
<
<
Description of Each Bit
BIT
Bit Name
Action
Value
Function
15 - 8
reserved
Read
-
Always indicate ‘0’.
7 - 6
Astat-n
Read
-
Indicate TPA line state of 1394 port n (MSB : 7 , LSB : 6).
00 = invalid
01 = ‘1’
10 = ‘0’
11 = ‘Z’
5 - 4
Bstat-n
Read
-
Indicate TPB line state of 1394 port n (MSB : 5 , LSB : 4).
00 = invalid
01 = ‘1’
10 = ‘0’
11 = ‘Z’
0
Indicates that 1394 port n is parent port.
3
Child-n
Read
1
Indicates that 1394 port n is children port.
0
Indicates that cable is not connected to 1394 port n.
2
Connected-n
Read
1
Indicates that cable is connected to 1394 port n.
1 - 0
reserved
Read
-
Always indicate ‘0’