PM8610-BIAP PMC [PMC-Sierra, Inc], PM8610-BIAP Datasheet - Page 37
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PM8610-BIAP
Manufacturer Part Number
PM8610-BIAP
Description
SBS Telecom Standard Product Data Sheet Preliminary
Manufacturer
PMC [PMC-Sierra, Inc]
Datasheet
1.PM8610-BIAP.pdf
(338 pages)
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Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000168, Issue 3
Pin Name
JUST_REQ[4]
JUST_REQ[3]
JUST_REQ[2]
JUST_REQ[1]
(continued)
OACTIVE[4]
OACTIVE[3]
OACTIVE[2]
OACTIVE[1]
ODETECT[4]
ODETECT[3]
ODETECT[2]
ODETECT[1]
OTPL[4]
OTPL[3]
OTPL[2]
OTPL[1]
Type
Output
Input
Tristate
Output
Pin No.
AE23
V1
B5
D16
AD22
R2
C6
B17
AC20
V3
C8
B13
For fractional rate links this signal is asserted high during any
available information byte to indicate to the slave timed SBI device
that the timing master device is able to accept another byte of data.
For every byte that this signal is asserted high the slave device is
expected to send a valid byte of data.
All timing adjustments from the slave timed device in response to
the justification request must still set the payload and payload
indicators appropriately for timing adjustments.
JUST_REQ[1] can be part of either a 19.44 MHz SBI bus when
combined with JUST_REQ[4:2] or can be used as part of a
standalone 77.76 MHz SBI336 bus.
JUST_REQ[4:1] is configured as an input in TelecomBus mode
and is ignored.
JUST_REQ[4:1] is asserted and sampled on the rising edge of
SREFCLK.
Outgoing Bus Active Indicator (OACTIVE[4:1]). The active high
Outgoing SBI Bus Active Indicator signal, OACTIVE[x], is asserted
high during all octets when driving data and control signals,
ODATA[x][7:0], ODP[x], OPL[x] and OV5[x], onto the bus.
All other SBI devices driving the bus listen to this signal to detect
multiple sources driving the bus which can occur due to
configuration problems.
OACTIVE[4:1] is only valid when the SBS is configured for a 19.44
MHz SBI bus. In all other modes, OACTIVE[4:1] is held low.
OACTIVE[x] is updated on the rising edge of SREFCLK.
Outgoing Bus Active Detector (ODETECT[4:1]). This input
listens to the OR of all other SBI device ACTIVE signals.
When another device is driving OACTIVE[x] high and this device
detects ODETECT[x] is high from that other device it signals a
collision and tristates the bus to minimize or eliminate contention.
Tristating is only done with the 19.44 MHz SBI buses.
The AND of OACTIVE[x] and ODETECT[x] is sampled on the rising
edge of SREFCLK to indicate that a collision occurred and can be
used to indicate contention to management procedures.
ODETECT[4:1] is only valid when the SBS is configured for a 19.44
MHz SBI bus. In all other modes, ODETECT[4:1] is ignored.
ODETECT[4:1] have integral pull-up resistors.
Outgoing Tributary Payload (OTPL[4:1]). This signal is used to
indicate tributary payload when configured for TelecomBus and is
held low when configured for SBI or SBI336 buses.
OTPL[x] is set high during valid VC11 and VC12 bytes of the
corresponding Outgoing bus. OTPL[x] is set low for all transport
overhead bytes, high order path overhead bytes, fixed stuff column
bytes and tributary transport overhead bytes (V1,V2,V3,V4).
OTPL[1] can be part of either a 19.44 MHz TelecomBus when
combined with OTPL[4:2] or can be used as part of a standalone
77.76 MHz TelecomBus.
OTPL[4:2] are held tri-state when configured for 77.76 MHz
operation.
OTPL[x] is updated on the rising edge of SREFCLK.
Function
SBS Telecom Standard Product Data Sheet
Preliminary
37
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