PM4328-PI PMC-Sierra, Inc., PM4328-PI Datasheet - Page 60

• Manufacturer Part Number: PM4328-PI
• Description: Framer, T1|E1|T3 Standard Format, 324-BGA
• Manufacturer: PMC-Sierra, Inc.

STANDARD PRODUCT
DATASHEET
PMC-2011596
Pin Name
Microprocessor Interface
INTB
CSB
RDB
WRB
PROPRIETARY AND CONFIDENTIAL
Type
Output
OD
Input
Input
Input
ISSUE 1
Pin
No.
A16 Active low Open-Drain Interrupt (INTB). This signal
D16 Active Low Chip Select (CSB). This signal is low
B16 Active Low Read Enable (RDB). This signal is low
C15 Active Low Write Strobe (WRB). This signal is low
Function
A collision is detected when either of SBIDET[1:0]
signals are active concurrently with this device driving
SBIACT. When collisions occur the SBI drivers are
disabled and an interrupt is generated to signal the
collision.
These signals are sampled on the rising edge of
SREFCLK.
SBIDET[1] is shared with serial interface signal ED[7].
goes low when an unmasked interrupt event is
detected on any of the internal interrupt sources. Note
that INTB will remain low until all active, unmasked
interrupt sources are acknowledged at their source.
during TECT3 register accesses. CSB has an integral
pull up resistor.
during TECT3 register read accesses. The TECT3
drives the D[7:0] bus with the contents of the
addressed register while RDB and CSB are low.
during a TECT3 register write access. The D[7:0] bus
contents are clocked into the addressed register on the
rising WRB edge while CSB is low.
47
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
PM4328 TECT3