IP-POSPHY/L3 Altera, IP-POSPHY/L3 Datasheet - Page 55

• Manufacturer Part Number: IP-POSPHY/L3
• Manufacturer: Altera

Specifications of IP-POSPHY/L3

• Lead Free Status / RoHS Status: Not Compliant

Chapter 3: Functional Description
Interface Signals
Table 3–13. Atlantic Interface Data Signals (Part 1 of 2)
© November 2009 Altera Corporation
dat[63:0]
dat[31:0]
dat[15:0]
dat[7:0]
par
sop
eop
Signal
Data bus. dat carries the packet octets that are transferred across the interface. Data is transmitted in
big-endian order on dat, that is, most significant bit (MSB) first and all valid bits are contiguous with
the MSB.
Parity signal (optional). par indicates the parity calculated over the dat bus. Odd and even parity are
supported.
Start of packet. sop delineates the packet boundaries on the dat bus. When sop is high, the start of
the packet is present on the dat bus. sop is asserted on the first transfer of every packet.
End of packet. eop delineates the packet boundaries on the dat bus. When eop is high, the end of the
packet is present on the dat bus. mty indicates the number of invalid bytes the last word is composed
of when eop is asserted. eop is asserted on the last transfer of every packet.
■
The data flow on the Atlantic interface can be in either direction.
Figure 3–17. Atlantic Interface Control Options
Note to
(1) Buses are unidirectional only.
A slave sink responds to write commands from the master source and behaves like a
synchronous FIFO buffer.
A master sink generates read commands to a slave source, when it requires data, and
behaves like a synchronous FIFO buffer controller.
Table 3–13
Master sink to slave source
Figure
shows the Atlantic data interface signal definitions.
3–17:
Interface
Atlantic
Source
Master
eop
ena
par
sop
mty
dav
dat
err
Preliminary
Interface
Atlantic
Slave
Sink
Description
Interface
Atlantic
Master
Sink
POS-PHY Level 2 and 3 Compiler User Guide
sop
eop
mty
ena
dav
dat
par
err
val
Interface
Atlantic
Source
Slave
3–27