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PM7329 S/UNI-APEX-1K800
DATASHEET
PMC-2010141
ISSUE 2
ATM TRAFFIC MANAGER AND SWITCH
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
43
Pin Name
Type
Pin
No.
Function
BTERMB
Tri-state
E3
Burst Terminate Bar.
This signal is asserted low
by S/UNI-APEX-1K800 when a data transfer has
reached the address boundary of a burstable range.
Attempts to extend the burst transfer after this signal
is asserted will be ignored. This output is Hi-Z’d one
clock cycle after an S/UNI-APEX-1K800 access,
allowing multiple slave device to be tied together in
the system. This output should be pulled up
externally.
BTERMB is updated on the rising edge of BCLK.
WRDONEB
Output
D2
Write Done Bar.
This signal is asserted low by
S/UNI-APEX-1K800 when the most recent write
access to internal registers is complete. This signal
may be used by external circuitry to delay the
issuance of a write operation address cycle until
S/UNI-APEX-1K800 can accept write data. This
signal is only needed in systems where the
READYB output cannot be used to delay a write
data transaction (due to microprocessor
restrictions).
WRDONEB is updated on the rising edge of BCLK.
INTHIB
OD
C4
Active Low Open-Drain High Priority Interrupt.
This signal goes low when an S/UNI-APEX-1K800
high priority interrupt source is active and that
source is unmasked. The S/UNI-APEX-1K800 may
be enabled to report many alarms or events via
interrupts. INTHIB becomes high impedance when
the interrupt is acknowledged via an appropriate
register access.
INTHIB is an asynchronous signal.