S1R72803F00A
EPSON
69
Address
Register Name
Bit Symbol R/W
Description
H.Rst S.Rst B.Rst
0x4A
UsedRxORBPtr_H
7:
Write is ignore
6:
Read is always zero
5:
4: UOP[12]
0x00
0x00
–
3: UOP[11]
2: UOP[10]
1: UOP[9]
0: UOP[8]
0x4B
UsedRxORBPtr_L
7: UOP[7]
R/W
Received Packet ORB Data Area Used Pointer
6: UOP[6]
5: UOP[5]
4: UOP[4]
0x00
0x00
–
3: UOP[3]
2: UOP[2]
1:
Write is ignore
0:
Read is always zero
Address
Register Name
Bit Symbol R/W
Description
H.Rst S.Rst B.Rst
0x48
UsedRxHdrPtr_H
7:
Write is ignore
6:
Read always zero
5:
4: URHP[12]
0x00
0x00
–
3: URHP[11]
2: URHP[10]
1: URHP[9] R/W
Received Packet Header Area Used Pointer
0: URHP[8]
0x49
UsedRxHdrPtr_L
7: URHP[7]
6: URHP[6]
5: URHP[5]
4:
0x00
0x00
–
3:
Write is ignore
2:
Read is always zero
1:
0:
Used Receive Header Pointer Register
This Used Receive Header Pointer Register indicates the starting address of used header of a receive packet in
the RxHdrArea. Since the buffer pointer is 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”.
Used Receive ORB Data Pointer Register
This Used Receive ORB Data Pointer Register indicates the starting address of used ORB data of receive packet
in the RxORBArea. 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”.
