PXB4330 Datasheet, PDF (66/201 Pages) Infineon Technologies AG – ICs for Communications

PXB 4330
Interface Descriptions
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
25.6 Mbit/s
PHY
device 0
Adr 0..5
PHY
device 1
Adr 0..5
PHY
device 2
Adr 0..5
PHY
device 3
Adr 0..5
RxEnb0
RxCLAV0
RxEnb1
RxCLAV1
UTOPIA
RxEnb2 _{Interface of}
RxCLAV2 ATM layer device
e.g.
PXB 4350 E ALP
PXB 4340 E AOP
PXB 4330 E ABM
RxEnb3 PXB 4325 E ASP
RxCLAV3
RxAdr(3:0)
RxBUS(17:0)
UTCLK
RxBUS(17:0) = RxSOC : RxPrty : RxDat(15:0)
UTCLK
Figure 5-2 Upstream Receive UTOPIA Example: 4 x 6 PHYs
The four CLAVx/ENBx lines are connected one-to-one to different PHY devices, as
shown in the example of Figure 5-2 for the upstream receive side of an ATM Layer chip
connected to four PHY devices, each containing six PHYs of 25.6 Mbit/s. In this exam-
ple, 24 PHYs, the maximum number, are connected.
In the example of Figure 5-2, the ABM gets four CLAVx signals with each polled ad-
dress. All PHY devices have the addresses 0..5 assigned to their PHYs. The upper six
addresses (6..11) always deliver CLAVx = 0 when polled. To distinguish the PHYs, the
UTOPIA Interface of the ABM chip adds offset numbers 6, 12, and 18, to the PHY num-
bers from PHY Devices 1, 2, and 3, respectively. Then within the ATM Layer device, the
PHY numbers range from 0..23 without ambiguity.
Data Sheet
5-66
09.99