PM5362TUPP-PLUS
DATA SHEET
PMC-951010
ISSUE 6
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR / PERFORMANCE MONITOR
Pin Name Type
Pin
Function
No.
MBEB
Input
14
The active low Motorola bus enable (MBEB)
signal configures the TUPP-PLUS for Motorola
bus mode where the RDB/E signal functions as
E, and the WRB/RWB signal functions as RWB.
When MBEB is high, the TUPP-PLUS is
configured for Intel bus mode where the RDB/E
signal functions as RDB. The MBEB input has
an integral pull up resistor.
CSB
Input
Input
13
35
The active low chip select (CSB) signal is low
during TUPP-PLUS register accesses. If CSB is
not required (i.e., register accesses are
controlled by using the RDB/E and WRB/RWB
signals only), CSB must be connected to an
inverted version of RSTB.
RDB/
The active low read enable (RDB) signal is low
during TUPP-PLUS register read accesses while
in Intel bus mode. The TUPP-PLUS drives the
D[7:0] bus with the contents of the addressed
register while RDB and CSB are low.
E
The active high external access (E) signal is
high during TUPP-PLUS register access while in
Motorola bus mode.
WRB/
Input
37
The active low write strobe (WRB) signal is low
during a TUPP-PLUS register write accesses
while in Intel bus mode. The D[7:0] bus contents
are clocked into the addressed register on the
rising WRB edge while CSB is low.
RWB
The read/write select (RWB) signal selects
between TUPP-PLUS register read and write
accesses while in Motorola bus mode. The
TUPP-PLUS drives the D[7:0] bus with the
contents of the addressed register while CSB is
low and RWB and E are high. The D[7:0] bus
contents are clocked into the addressed register
on the falling E edge while CSB and RWB are
low.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
34
PMC [ PMC-SIERRA, INC ]
