IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
Advance
Table 45: Interface Description for DASL Internal Signals (Page 1 of 3)
Signals
Direction
Description
Clocking
Reset
CORE_RESET (DASL reset)
SDC_RESET (SDC Reset)
In
In
Core Logic Discrete Reset (active reset signal)
Shared DASL Controller Processor Reset
Active reset signal used in conjunction with picocode download.
Test
SDC Internal Resource Interface
SDC_WRITE_EN
In
In
SDC Write Enable triggers a write operation during picocode download.
SDC Read Enable triggers a picocode read operation.
SDC Address Bus
SDC_READ_EN
SDC_ADDRESS(0:10)
SDC_DATA_IN(0:15)
SDC_DATA_OUT(0:15)
SDC_INTERRUPT
In
In
SDC Write Data Bus
Out
Out
SDC Read Data Bus
SDC Interrupt.
Application Control Interface
Configuration Register
(0:4) Number Physical DASL Ports - 1 (n-1). (MSB) = Bit 4.
(5:7) Number of Physical Sub-Ports -1 (m-1). MSB = Bit 7. Only two values
are supported:
(5:7)=110’ for a 16-bit port
(5:7)=111 for a 32-bit port
(8:12) Unique Hardware Version Number (obtain from provider of the source
picocode). MSB = Bit 12.
CONFIG(0:15)
In
(13) External Speed Expansion Mode. This bit should be tied high if external
speed expansion is enabled. This is a reserved function and should
not be enabled. This bit must be held low.
(14) Internal Speed Expansion Mode. This bit should be tied high if internal
speed expansion is enabled. This is a reserved function and should
not be enabled. This bit must be held low.
(15) DASL Synchronization Mode: same value as the signal DASLSYNC-
MODE.
Application Port Interface
PORT_ENABLE
In
In
DASL Port Enable
DASL Synchronization Request
SYNC_HUNT
A low to high transition will force the synchronization sequence of the receive
DASL port
PARALLEL_DATA_IN(31:0)
TX_SYNCREQ
In
In
Parallel Data In: Data to be transmitted.
Transmit Link Synchronization Request Input: When active the DASL TXPORT
enters an idle state and will begin the synchronization sequence after the fall-
ing edge.
Receive Data Indication: indicates, when active, the DATA_OUT bus now
holds valid data
RX_DATA_IND
PARALLEL_DATA_OUT(31:0)
PORT_ERROR
Out
Out
Out
Parallel Data Out: data received from the DASL
Port Error: indicates, when active, that an error has been detected by the
Shared DASL Controller.
Appendix A: Data Aligned Serial Link (DASL)
Page 142 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
