![](http://datasheet.mmic.net.cn/330000/PM73123_datasheet_16444369/PM73123_310.png)
RELEASED
DATASHEET
PM73123 AAL1GATOR-8
ISSUE 2
PMC-2000097
8 LINK CES/DBCES AAL1 SAR
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL
310
Figure 89 UI_SRC_INTF Start-of-Transfer Timing (Utopia 2 PHY Mode)
AAL1 Add
AAL1_Add
P1
P2
P3
P4
D1
D2
D3
D4
RPHY_CLK(i)
RPHY_ADDR(i)
RPHY_CLAV(o)
RPHY_ENB(i)
RPHY_SOC(o)
RPHY_PAR(o)
RPHY_DATA(o)
The end-of-transfer behavior is shown in Figure 90. As with Utopia 1 mode, the
state of RPHY_CLAV reflects the current cell transfer status and so remains
asserted until the last data byte/word. The SRC_INTF in this example does not
have another cell to send, so RPHY_CLAV shows a low value after the transfer.
Figure 90 UI_SRC_INTF End-of-Transfer Timing (Utopia 2 PHY Mode)
AAL1 Addr
D24
D25
D26
D27
D50
D51
D52
D53
RPHY_CLK(i)
RPHY_ADDR(i)
RPHY_CLAV(o)
RPHY_ENB(i)
RPHY_SOC(o)
RPHY_DATA(o) (16-bit)
RPHY_DATA(o) (8-bit)
Figure 91 is a functional timing of the SRC_INTF for the start of a cell transfer
when configured as an Any-PHY compliant receive slave. During a polling
operation, when the SRC_INTF determines that the UI_SRC_ADDR_CFG
address is on the bus it responds by driving RPHY_CLAV two cycles later. If
CS_MODE_EN is set in the UI_SRC_CFG register then CSB must also be
driven low one cycle after the RPHY_ADDR for proper response. If the
SRC_INTF has a cell to send it will drive RPHY_CLAV high and, as a result, the
master will activate RPHY_ENB to initiate a transfer. As with Utopia 2, the
SRC_INTF is selected if its address is on RPHY_ADDR inputs during the cycle
before RPHY_ENB goes low and in response transmits an entire cell.
RPHY_RSX is driven high during the prepended byte address and RPHY_SOC
is driven high during the first header byte of the ATM cell. Since data transfer
pausing is not supported, once a transfer is initiated, RPHY_ENB should remain