PXB4330 Datasheet, PDF (67/201 Pages) Infineon Technologies AG – ICs for Communications

PXB 4330
Interface Descriptions
Two other multi-PHY modes with UTOPIA addresses are selectable. One additional
mode is provided to connect Level 1 PHY chips without address inputs. All modes are
summarized in Table 5-3.
Table 5-3 UTOPIA Polling Modes
Mode 2 x 12 Mode 3 x 8 Mode 4 x 6
ENB0 / CLAV0
0
0
0
ENB1 / CLAV1
12
8
6
ENB2 / CLAV2
do not connect 16
12
ENB3 / CLAV3
do not connect do not connect 18
Level 1 Mode
0
0
0
0
Note: The numbers 0, 6, 8, 12, 16 and 18, indicate the Offset added to the PHY number.
• In Level 1 Mode, the PHY numbers are identical to the CLAV/ENB group: 0, 1, 2, 3.
• The user must program the PHY numbers in such a way as to avoid ambiguous PHY
numbers inside the ATM Layer device.
• Mode selection can be done independently for the PHY side and the ATM side UTO-
PIA interfaces.
• If 12 PHYs or fewer are to be polled, Mode 2 x 12 should be used with only the CLAV0/
ENB0 pair connected. This minimizes the interconnection lines between the chips.
• The enabling of the PHYs is done with a 24-bit bitmap for each UTOPIA Interface.
Polling at the Master Interface always extends over the 4 CLAV/ENB pairs and over
all 12 addresses. After conversion to the internal PHY number, the ports not enabled
are masked out and one of the available PHYs is selected in a fair way.
Examples:
1. One PHY device, such as 622 Mbit/s PHY:
16-bit bus width, address lines unconnected, RxCLAV0/RxEN0 and TxCLAV0/TxEN0
signal pairs connected, all other CLAVx/ENBx pairs unconnected.
2. Four PHY devices, 155.52 Mbit/s PHYs: 16-bit bus width, address lines unconnected,
all four CLAVx/ENBx pairs connected, one to each PHY device.
3. Four PHY devices of 6-fold 25.6 Mbit/s PHYs:
16-bit bus width, address and all four CLAVx/ENBx pairs connected, one to each PHY
device (see Figure 5-2).
4. Three PXB 4220 IWE8s:
8-bit bus width, address bus unconnected, three CLAVx/ENBx pairs connected, one
to each IWE8 (this mode requires the PXB 4350 E ALP).
Data Sheet
5-67
09.99