SBI Bus Serializer ASSP Telecom Standard Product Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000168, Issue 5
30
9
Pin Description
Pin Name
Type
Pin
No.
Function
Receive Serial Data Interface (5 Signals)
RPWRK
RNWRK
Analog
LVDS
Input
M26
M25
Receive Working Serial Data.
In SBI336 mode, the
differential receive working serial data link
(RPWRK/RNWRK) carries the receive 77.76MHz
SBI336 data from an upstream working source, in bit
serial format, SBI336S.
In Telecom bus mode, RPWRK/RNWRK carries the
receive 77.76MHz Telecom bus from an upstream
working source, in bit serial format.
Data on RPWRK/RNWRK is encoded in an 8B/10B
format extended from IEEE Std. 802.3. The 8B/10B
character bit ‘a(chǎn)’ is expected first and the bit ‘j’ is
expected last.
RPWRK/RNWRK are nominally 777.6 Mbps data
streams.
If this serial link is unused, the LVDS inputs
RPWRK/RNWRK may be left floating or the inputs may
be grounded. In either case the analog blocks (RWLV
and WDRU) can be disabled to reduce power
consumption. Tying one pin high and the other pin low
will apply voltage across the internal termination
resistor, which will increase system power consumption.
RPPROT
RNPROT
Analog
LVDS
Input
N26
N25
Receive Protect Serial Data.
In SBI336 mode, the
differential receive protect serial data link
(RPPROT/RNPROT) carries the receive 77.76MHz
SBI336 data from an upstream protect source, in bit
serial format, SBI336S.
In Telecom bus mode, RPPROT/RNPROT carries the
receive 77.76MHz Telecom bus from an upstream
protection source, in bit serial format.
Data on RPPROT/RNPROT is encoded in an 8B/10B
format extended from IEEE Std. 802.3. The 8B/10B
character bit ‘a(chǎn)’ is expected first and the bit ‘j’ is
expected last.
RPPROT/RNPROT are nominally 777.6 Mbps data
streams.
If this serial link is unused, the LVDS inputs
RPPROT/RNPROT may be left floating or the inputs
may be grounded. In either case the analog blocks
(RPLV and PDRU) can be disabled to reduce power
consumption. Tying one pin high and the other pin low
will apply voltage across the internal termination
resistor, which will increase system power consumption.
RC1FP
Input
AF24
Receive Serial Frame Pulse.
The receive serial
SBI336S frame pulse signal (RC1FP) provides system
timing of the receive serial interface. When using the
receive parallel interface, this signal pulses high for one
SYSCLK cycle to indicate the first C1 byte on the bus.
Using the Receive Serial Interface: