s1r72801 Epson Electronics America, Inc., s1r72801 Datasheet - Page 57

• Manufacturer Part Number: s1r72801
• Description: Ieee1394 Controller S1r72801f00a
• Manufacturer: Epson Electronics America, Inc.

Dual Retry Time Set Register (Higher Rank, Lower Rank)
0x1C
0x1C, 0x1D
Priority Request Count Register
Bit7..6 Reserved
Bit5..0 pri_req[9:0]
Address Register Name
Address Register Name
Bit7..5 Second_Limit[2:0]
Cycle Limit[12:0]
0x1B
0x1C
0x1D
This register is used for the Dual Phase Retry protocol to set a retransmit retry time limit when an Async Transmit
packet is transmitted and a Busy is returned. When this register is “0”, the Dual Phase retry is ignored.
Set a Dual Phase Retry Time (Unit: second).
Sets a retry time at Cycle Limit [12:0] (Unit: 125 s).
This register shows registers in the pri-req field shown in the PRIORITY_BUDGET(CSR) register. This
register can precede the Priority Request as often as it is set to PriReq in a uniform section. But this register
can only be set by the node suitable for the bus manager.
This bit is for setting the value of pri_req designated by the bus manager. Any value exceeding the value of
pri_max to be packaged with the firmware cannot be set. The value is cleared to zero when a uniform section
ends.
PriReqCnt
RetryLimit_H
RetryLimit_L
7:
6:
5: PriReq[5]
4: PriReq[4]
3: PriReq[3]
2: PriReq[2]
1: PriReq[1]
0: PriReq[0]
7: SecLimit[2]
6: SecLimit[1]
5: SecLimit[0]
4: CycLimt[12]
3: CycLimt[11]
2: CycLimt[10]
1: CycLimt[9]
0: CycLimt[8]
7: CycLimt[7]
6: CycLimt[6]
5: CycLimt[5]
4: CycLimt[4]
3: CycLimt[3]
2: CycLimt[2]
1: CycLimt[1]
0: CycLimt[0]
Bit Symbol
Bit Symbol
R/W
R/W
R/W
R/W
R/W
0:
0:
Maximum Number of certain Priority Arb Request
EPSON
Dual Phase Retry Limit
Second Limit
Cycle Limit
If (SecLimit == 0 and CycLimit==0)
Dual Phase is ignore
Description
Description
1:
1:
S1R72801F00A
H.Rst S.Rst B.Rst
H.Rst S.Rst B.Rst
0x00 0x00 0x00
0x00 0x00
0x00 0x00
–
–
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