S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
Pin Name
BO_RDENB
Type
Input
Pin No Function
Read Enable. The S/UNI-ATLAS-3200 will transfer data out onto
the data bus when this signal is asserted.
BO_CLAV
BO_SOC
Output
Output
Cell Available. Indicates that the S/UNI-ATLAS-3200 has at least
one cell to transfer.
Start of Cell. Asserted when the first word of the cell is on the
data bus.
BO_DAT[15:0]
BO_PAR
Output
Output
Data
Parity over BO_PAR[15:0].
Microprocessor Access Port (52 Pins)
UP_DAT[31:0]
I/O
The bi-directional data bus, UP_DAT[31:0] is used during S/UNI-
ATLAS-3200 Microprocessor Interface Port register reads and
write accesses. UP_DAT[31] is the MSB.
UP_ADDR[11:0]
Input
The address UP_ADDR[11:0] selects specific Microprocessor
Interface Port registers during S/UNI-ATLAS-3200 register
accesses. UP_ADDR[11] is the Test Register Select (TRS)
address pin. TRS selects between normal and test mode register
accesses. TRS is high during test mode register accesses, and
is low during normal mode register accesses.
UP_RDB
UP_WRB
UP_CSB
Input
Input
Input
UP_RDB is low during S/UNI-ATLAS-3200 Microprocessor
Interface Port register read accesses. The S/UNI-ATLAS-3200
drives the UP_DAT[31:0] bus with the contents of the addressed
register while UP_RDB and UP_CSB are low.
UP_WRB is low during S/UNI-ATLAS-3200 Microprocessor
Interface Port register write accesses. The UP_DAT[31:0] bus
contents are clocked into the addressed register on the rising
edge of UP_WRB while UP_CSB is low.
UP_CSB is low during S/UNI-ATLAS-3200 Microprocessor
Interface Port register accesses.
If UP_CSB is not required (i.e. register accesses controlled using
UP_RDB and UP_WRB signals only), UP_CSB should be
connected to an inverted version of the UP_RSTB input.
UP_ALE
Input
The Microprocessor Address Strobe, UP_ALE, is active high and
latches the address bus, UP_ADDR[11:0], when low. When
UP_ALE is high, the internal address latches are transparent. It
allows the S/UNI-ATLAS-3200 to interface to a multiplexed
address/data bus. UP_ALE has an internal pull up resistor.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
60
PMC [ PMC-SIERRA, INC ]
