SPC7283 Epson Electronics America, Inc., SPC7283 Datasheet - Page 72
SPC7283
Manufacturer Part Number
SPC7283
Description
IEEE1394 Controller
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.SPC7283.pdf
(116 pages)
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S1R72803F00A
Receive Stream Data LINK Pointer Register
Transmit Stream Data LINK Pointer Register
68
Address
Address
0x44
0x45
0x46
0x47
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.
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.
LinkRxStreamPtr_H 7:
LinkRxStreamPtr_L 7: PSP[7]
LinkTxStreamPtr_H 7:
LinkTxStreamPtr_L
Register Name
Register Name
Bit Symbol R/W
Bit Symbol R/W
6:
5:
4: PSP[12]
3: PSP[11]
2: PSP[10]
1: PSP[9]
0: PSP[8]
6: PSP[6]
5: PSP[5]
4: PSP[4]
3: PSP[3]
2: PSP[2]
1:
0:
6:
5:
4: PTDP[12]
3: PTDP[11]
2: PTDP[10]
1: PTDP[9]
0: PTDP[8]
7: PTDP[7]
6: PTDP[6]
5: PTDP[5]
4: PTDP[4]
3: PTDP[3]
2: PTDP[2]
1:
0:
R/W
R
Write is ignore
Write is ignore
Read is always zero
Current Received Packet Stream Data Area Pointer
Write is ignore
Read is always zero
Read is always zero
Current Transmit Packet Data Area Pointer
Write is ignore
Read is always zero
EPSON
Description
Description
H.Rst S.Rst B.Rst
H.Rst S.Rst B.Rst
0x00 0x00
0x00 0x00
0x00 0x00
0x00 0x00
–
–
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