SPC7283 Epson Electronics America, Inc., SPC7283 Datasheet - Page 58

• Manufacturer Part Number: SPC7283
• Description: IEEE1394 Controller
• Manufacturer: Epson Electronics America, Inc.

S1R72803F00A
Single Retry Limit Set Register
Bit7..4 Reserved
Bit3..0 Single Retry Limit[3:0]
IRM Status Register
Bit7 No IRM
Sets whether an Isochronous Resource Manager exists on the serial bus. “1” indicates the IRM node does not exist and
Bit6 WonIRM
Bit5..0 IRM ID[5:0]
54
Address Register Name
Address Register Name
0x1E
0x1F
This register sets the number of retries of the Single Phase Retry protocol.
When its value is “0”, the Single Phase Retry is ignored.
Sets the number of retries in the Single Phase at maxRtry[3:0]
This IRM Status Register controls detection of the Isochronous Resource Manager.
“0” indicates the IRM node exists.
Sets whether the Isochronous Resource Manager is self node or other node.
“1” indicates it is the self node and “0” indicates it is other node.
Usually, this bit is read-only. When a valid IRM is not detectable due to hardware bugs, however, the firmware
sets this bit through a Self-ID packet or topology map.
When the EnLrmDetect bit is “1”, the node ID of the Isochronous Resource Manager detected in the Self-ID
period is set. When no node corresponding to the IRM exists, it indicates the 0x3F value.
MaxRetry
IRM_Stat
7: NoIRM
7:
6:
5:
4:
3: maxRty[3]
2: maxRty[2]
1: maxRty[1]
0: maxRty[0]
6: WonIRM
5: IRMID[5]
4: IRMID[4]
3: IRMID[3]
2: IRMID[2]
1: IRMID[1]
0: IRMID[0]
Bit Symbol
Bit Symbol
R(W) 0: Other Node
R/W
R/W
R/W
R
R
EPSON
0:
0:
0:
0:
Single Phase Retry Limit
Max Retry Count Value
If maxRty == 0, Single Phase Retry is ignore
0: Exist IRM Node
Physical ID of IRM Node
No exist IRM Node then IRMID=0x3F
Description
Description
1:
1:
1:
1:
1: None IRM Node
1: Self Node
H.Rst S.Rst B.Rst
H.Rst S.Rst B.Rst
0x00 0x00
0x3F
–
0x3F
–