s1r72803 Epson Electronics America, Inc., s1r72803 Datasheet - Page 71

• Manufacturer Part Number: s1r72803
• Description: Link/transaction Controller
• Manufacturer: Epson Electronics America, Inc.

Receive Header LINK Pointer Register
Receive ORB Data LINK Pointer Register
Address
Address Register Name
0x42
0x43
0x40
0x41
This Receive Header LINK Pointer Register indicates the starting address of the latest receive packet in the
RxHeaderArea. Since the buffer pointer is given in 8Quadlet unit, the lower order 5 bits are always “0”. Also,
since the buffer size is 2 Kbytes, the higher order 3 bits are always “0”.
Reading the higher order bytes holds the lower order bytes. Read the higher order bytes first, then the lower
order bytes.
This Receive ORB Data LINK Pointer Register indicates the starting address of the latest receive ORB data in
the RxORBdataArea. Since the buffer pointer is in Quadlet unit, the lower order 2 bits are always “0”. Also,
since the buffer size is 2 Kbytes, the higher order 3 bits are always “0”.
Reading the higher order bytes holds the lower order bytes. Read the higher order bytes first, then the lower
order bytes.
LinkRxORBPtr_H
LinkRxORBPtr_L
LinkRxHdrPtr_H 7:
LinkRxHdrPtr_L 7: LRHP[7]
Register Name
6:
5:
4: LRHP[12]
3: LRHP[11]
2: LRHP[10]
1: LRHP[9]
0: LRHP[8]
6: LRHP[6]
5: LRHP[5]
4:
3:
2:
1:
0:
Bit Symbol
7:
6:
5:
4: POP[12]
3: POP[11]
2: POP[10]
1: POP[9]
0: POP[8]
7: POP[7]
6: POP[6]
5: POP[5]
4: POP[4]
3: POP[3]
2: POP[2]
1:
0:
Bit Symbol R/W
R/W
R/W
R/W
Write is ignore
Read is always zero
Current Received Packet ORB Data Area Pointer
Write is ignore
Read is always zero
Write is ignore
Read is always zero
Current Received Packet Header Area Pointer
Write is ignore
Read is always zero
EPSON
Description
Description
S1R72803F00A
H.Rst S.Rst B.Rst
H.Rst S.Rst B.Rst
0x00 0x00
0x00 0x00
0x00 0x00
0x00 0x00
–
–
–
–
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