IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
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Table 45: Interface Description for DASL Internal Signals (Page 3 of 3)
Signals
Direction
Description
SDC Status Register
(0:7) DASL Control Code Version
(8:15) DASL Control Code Revision
(16:17) Reserved. All bits are set to zero.
(18)
Parity Error - A parity error was detected on a Local Store or Instruc-
tion RAM read. Active high.
(19)
Port Quality Error - A logical "or" of the SDC_PORTQUALITY output.
Indicates, when active, that the Shared DASL Controller has
detected a minimum eye violation on a port. This violation indicates
that one or more of the DASLs that make up the port is not operating
within specification.
SDC_STATUSREG(0:31)
Out
(20:23) Current Port Identification - Displays the number of the port currently
being processed by the Shared DASL Controller.
(24:31) Status Count Output - Written by the Shared DASL Controller to be
one greater than the value present in the Status Count Input field of
the SDC Debug Control Input bus. Serves as a watchdog mechanism
to allow the application to monitor the Shared DASL Controller.
Contains the SDC Debug read data which is validated by an active SDC
Debug Operation Complete. On write commands, this bus will contain the SDC
Debug write data.
SDC_DEBUGDATA_OUT(0:31)
SDC_DEBUGDATA_VALID
Out
Out
SDC Debug Operation Complete is active high for one OSC_125_DIV4 clock
cycle to validate the data on the SDC_DEBUGDATA_OUT bus.
Appendix A: Data Aligned Serial Link (DASL)
Page 144 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
