ZL30226/GA ZARLINK [Zarlink Semiconductor Inc], ZL30226/GA Datasheet - Page 54

• Manufacturer Part Number: ZL30226/GA
• Description: 4/8/16 Port IMA/TC PHY Device for xDSL
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

4.1.1
In Non-framed mode, all links are able to run from 0 up to 2.5 Mb/s. On the transmit side, if the TXCK is programmed
as input. The transmitter will be "free running" and will output serial data continuously. This mode is selected in TDM
TX Link Control (0x0600-0x060F) and TDM RX Link Control (0x0700-0x070F) by the following settings.
4.1.2
If a serial link of more than 2.5 Mbps but less than 5.0 Mbps data rate is required, this mode can be applied. For
every two links in a pair, one is disabled and the other is able to run from 0 up to 5.0 Mb/s. The links that are paired
are pre-determined: link 0 with link 1, link 2 with link 3 and so on. The link that will remain enabled in each pair is also
pre-determined. They are link 0, 2, 4, 6, 8, 10, 12 and 14.
For the pair of link 0 and link 1, the pins associated with link 1 cannot be used and are tri-stated. On the transmit side
of link 0, if the TXCK is programmed as an input, the transmitter will be "free running" and will output serial data
continuously. The same logic applies to the other pairs.
For any disabled link, its associated registers are all disabled, except for mapping registers that must be set to all
ones. No other configuration is necessary for disabled links.
When the link is part of an IMA group, then both links that are paired have to be assigned to the same IMA group
number. This is done by writing to the RX Recombiner Register (0x0201-0x0208).
This mode is selected in TDM TX Link Control (0x0600-0x060F) and TDM RX Link Control (0x0700-0x070F) by
writing the following settings into those enabled links only.
4.1.3
If a serial link of more than 5 Mbps but less than 10.0 Mbps data rate is required, this mode can be applied. For every
four links in a group, three are disabled and the other is able to run from 0 up to 10.0 Mbps. The four links that can
be grouped are pre-determined: link 0, 1, 2, 3 are one group; link 4, 5, 6, 7 are one group and so on. The link that
will remain enabled in each group is also pre-determined. They are link 0, 4, 8 and 12.
For the group of link 0, 1, 2 and 3, the pins associated with link 1, 2 and 3 cannot be used and are tri-stated. On the
transmit side of link 0, if the TXCK is programmed as an input, the transmitter will be "free running" and will output
serial data continuously. The same logic applies to the other groups.
For any disabled link, its associated registers are all disabled, except for mapping registers that must be set to all
one. No other configuration is necessary for disabled links.
When the link is part of an IMA group, then the four links that are grouped have to be assigned to the same IMA
group number. This is done by writing to the RX Recombiner Register (0x0201-0x0208).
Data rate (bits 6:5) = 01
Multiplex mode (bits 4:3) = 00
Cell delineation mode (bit 10 of TDM RX Link Control only) = 1
Data rate (bits 6:5) = 10
Multiplex mode (bits 4:3) = 00
Cell delineation mode (bit 10 of TDM RX Link Control only) = 1
Non-Framed Mode - 2.5 Mbps
Non-Framed Mode - 5.0 Mbps
Non-Framed Mode - 10.0 Mbps
Zarlink Semiconductor Inc.
ZL30226/7/8
54
Data Sheet