PM7344 S/UNI-MPH
DATA SHEET
PMC-950449
ISSUE 6
MULTI-PHY USER NETWORK INTERFACE
The S/UNI-MPH is configured for direct PHY selection (MPHEN = 0). The
TCA[x] cell available indicators signal when a cell is available in the
corresponding PHY's transmit FIFO (shown with TFULL4 in the TXCP Interrupt
Enable / Status and Control Register set to logic 1). The TWRENB[x] input is
brought low to begin the cell transfer. Only one TWRENB[x] should be active
during a cell transfer.
Figure 23
- Direct-PHY Selection Receive Cell Interface (MPHEN = 0)
…
RFCLK
…
…
…
RRDENB[x]
RSOC
RCA[x]
REMPTY4=1
…
RDAT[7:0]
H1
H2
P43 P44
P45 P46
P47 P48
X
…
RXPRTY
The S/UNI-MPH is configured for direct PHY selection (MPHEN = 0). The
RCA[x] cell available indicators signal when a cell is available in the
corresponding PHY's receive FIFO. The RRDENB[x] input is brought low to
begin the cell transfer. Only one RRDENB[x] should be active during a cell
transfer.
Figure 24
- Multi-PHY Addressing Transmit Cell Interface (MPHEN = 1)
TFCLK
• • •
0
0
1
1
2
TWA[1:0]
TCAMPH
TWRMPHB
TSOC
• • •
• • •
2
2
3
3
0
0
• • •
• • •
• • •
• • •
H1
H2
H3
P4 6 P4 7 P4 8
H2
TDAT[7:0]
TXPRTY
H1
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
228
PMC [ PMC-SIERRA, INC ]
