S1R72803F00A
EPSON
67
Address Register Name
Bit Symbol
R/W
Description
H.Rst S.Rst B.Rst
0x40
LinkRxHdrPtr_H 7:
Write is ignore
6:
Read is always zero
5:
4: LRHP[12]
0x00
0x00
–
3: LRHP[11]
2: LRHP[10]
1: LRHP[9]
R/W
Current Received Packet Header Area Pointer
0: LRHP[8]
0x41
LinkRxHdrPtr_L 7: LRHP[7]
6: LRHP[6]
5: LRHP[5]
4:
0x00
0x00
–
3:
Write is ignore
2:
Read is always zero
1:
0:
Receive Header LINK Pointer Register
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.
Receive ORB Data LINK Pointer Register
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.
Address
Register Name
Bit Symbol
R/W
Description
H.Rst S.Rst B.Rst
0x42
LinkRxORBPtr_H
7:
Write is ignore
6:
Read is always zero
5:
4: POP[12]
0x00
0x00
–
3: POP[11]
2: POP[10]
1: POP[9]
0: POP[8]
0x43
LinkRxORBPtr_L
7: POP[7]
R/W
Current Received Packet ORB Data Area Pointer
6: POP[6]
5: POP[5]
4: POP[4]
0x00
0x00
–
3: POP[3]
2: POP[2]
1:
Write is ignore
0:
Read is always zero
