S1R72803F00A
68
EPSON
Address
Register Name
Bit Symbol R/W
Description
H.Rst S.Rst B.Rst
0x44
LinkRxStreamPtr_H 7:
Write is ignore
6:
Read is always zero
5:
4: PSP[12]
0x00
0x00
–
3: PSP[11]
2: PSP[10]
1: PSP[9]
0: PSP[8]
0x45
LinkRxStreamPtr_L
7: PSP[7]
R/W
Current Received Packet Stream Data Area Pointer
6: PSP[6]
5: PSP[5]
4: PSP[4]
0x00
0x00
–
3: PSP[3]
2: PSP[2]
1:
Write is ignore
0:
Read is always zero
Address
Register Name
Bit Symbol R/W
Description
H.Rst S.Rst B.Rst
0x46
LinkTxStreamPtr_H 7:
Write is ignore
6:
Read is always zero
5:
4: PTDP[12]
0x00
0x00
3: PTDP[11]
2: PTDP[10]
1: PTDP[9]
0: PTDP[8]
0x47
LinkTxStreamPtr_L
7: PTDP[7]
R
Current Transmit Packet Data Area Pointer
6: PTDP[6]
5: PTDP[5]
4: PTDP[4]
0x00
0x00
3: PTDP[3]
2: PTDP[2]
1:
Write is ignore
0:
Read is always zero
Receive Stream Data LINK Pointer Register
This Receive Stream Data LINK Pointer Register indicates the starting address of the latest received stream data
in the RxStreamdataArea. 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.
Transmit Stream Data LINK Pointer Register
This Transmit Stream Data LINK Pointer Register indicates the starting address of unused area in the
RxStreamArea. 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. This register is read-only. Writing is ignored.
