
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7341 S/UNI-IMA-84
DATASHEET
PMC-2000223
ISSUE 4
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
357
The configuration options are programmed one link at a time by following the
steps below:
RTTC/TTTC Programming Steps:
1. For each write access, wait until the LBUSY bit in the RTTC/TTTC
Indirect Status Register is clear. Note that the LBUSY bit might not be
ready for up to 86 REFCLK cycle after an access.
2. Once the BUSY bit is clear, write to the RTTC/TTTC Link Data
Register to specify the desired configuration options for that link.
3. Next, write into the RTTC/TTTC Indirect Status register specifying
the SPE and LINK that is about to be configured and whether this is to
be a write or a read access, by clearing or setting the LWRB bit in this
register.
12.3.4 UTOPIA Interface Configuration
There is very little setup required to configure the Any-PHY/UTOPIA Interface.
For typical operation, the following registers need to be written to select the mode
of operation and the predefined address or address range of the S/UN-IMA-84
and the number of active ports of the S/UNI-IMA-84.
Transmit Any-PHY/UTOPIA Cell available Enable
Receive UTOPIA Cell Available Enable
Transmit Any-PHY Address Config Register
Receive Any-PHY/UTOPIA Config register
Transmit Any-PHY/UTOPIA Config Register
Once the registers are written with the proper configuration information, the
enable bit should be set to enable normal operation.