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RELEASED
PM73122 AAL1GATOR-32
DATASHEET
PMC-1981419
ISSUE 7
32 LINK CES/DBCES AAL1 SAR PROCESSOR
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
403
the PHY slave at least four cycles before the end of the cell if the PHY cannot
accept another complete cell. Note that one additional cycle is used to allow the
input TPA signal to be clocked into the master device, thus the PHY must assert
TPA low along with data byte D49 and no later if it cannot accept another cell.
Figure 94 SRC_INTF End-of-Transfer Timing (Utopia 1 ATM Mode)
D48
D49
D50
D51
D52
D53
D48
D49
D50
D51
D52
D53
TATM_CLK(i)
TATM_CLAV(i)
TATM_ENB(o)
TATM_TSOC(o)
TATM_DATA(o)
TATM_PAR(o)
TATM_CLAV sampled here
In PHY slave mode, the SRC_INTF block sources RPHY_DATA, RPHY_PAR,
RPHY_SOC, and RPHY_CLAV, while receiving RPHY_ENB. The
RPHY_ADDR(4:0) inputs are not used in Utopia 1 PHY slave mode but must be
set to be the same value as the UI_SRC_ADDR_CFG register value for proper
operation. The RPHY_SOC indication is generated coincident with the first word
(8-bit or 16-bit) of each cell that is transmitted on RPHY_DATA. In PHY mode,
RPHY_DATA, RPHY_SOC, and RPHY_PAR are driven only when valid data is
being sent; otherwise they are tristated.
Figure 95 UI_SRC_INTF Start-of-Transfer Timing (Utopia 1 PHY Mode)
Input must be same value as UI_SRC_ADDR_CFG register
D1
D2
D3
D4
D1
D2
D3
D4
RPHY_CLK(i)
RPHY_ADDR(i)
RPHY_CLAV(o)
RPHY_ENB(i)
RPHY_SOC(o)
RPHY_PRTY(o)
RPHY_DATA(o)
The cell available (RPHY_CLAV) signal indicates when the device has a
complete cell to send. In Utopia 1 slave (SPHY) mode, RPHY_CLAV is always
driven. Figure 95 above, shows a start-of-transfer for Utopia 1 PHY slave mode.
If a cell is being read in Utopia 1 PHY mode, RPHY_CLAV will be asserted until