PM73121ꢀAAL1gator II
Data Sheet
PMC-Sierra, Inc.
PMC-980620
,VVXHꢀꢁ
AAL1 SAR Processor
Thd
Tdc
Tsu
TPHY_CLK(i)
Tq
TPHY_CLAV(o)
TPHY_DATA(i)
TPHY_SOC(i)
TPHY_EN(i)
D1
D2
D3
D4
Figure 67. RUTOPIA SPHY Timing
Symbol
Parameter
Signal
Min
Max
Unit
TPHY_CLK frequency
TPHY_CLK duty cycle
TPHY_CLK hold time
33
55
MHz
%
Tdc
Thd
45
1
TPHY_DATA,
ns
TPHY_SOC, /TPHY_EN
Tq
TPHY_CLK-to-output
delay
TPHY_CLAV
12
ns
ns
Tsu
TPHY_CLK setup time
TPHY_DATA, TPHY_SOC, /TPHY_EN
5
6.4.3 RUTOPIA as the PHY Layer Device in Multi-PHY (MPHY) Mode
The RUTOPIA block functions as a transmit UTOPIA block when in MPHY mode. The transmit
MPHY UTOPIA timing signals are compatible with the UTOPIA Level 2 MPHY specification
(refer to Appendix B, “References”, on page 203). Table 20 on page 101 indicates the transmit
UTOPIA signal names and their corresponding UTOPIA designations. The AAL1gator II will not
drive TPHY_CLAV unless /TPHY_ADDR was low the previous cycle. The value driven will be
dependent on whether or not it has room for a complete cell. TPHY_DATA and TPHY_SOC are
captured when /TPHY_EN is active and the AAL1gator II was selected. The AAL1gator II is
selected only if /TPHY_ADDR is low and /TPHY_EN is high during one clock cyle, and /TPHY_
EN is asserted low in the following clock cycle. TPHY_SOC indicates the start of a new cell. If
the current cell will fill the internal FIFO, then TPHY_CLAV will be deactivated the same cycle
it is receiving the 49th byte of data if /TPHY_ADDR is low on the previous cycle. Figure 68
ꢀꢉꢁ
PMC [ PMC-SIERRA, INC ]
