Multi-Service Access Device For Channelized Interfaces
Telecom Standard Product Data Sheet
Production
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990823, Issue 4
69
Pin Name
Type
Pin No.
Function
Transmit Serial TelecomBus Interface (19 Signals)
TPWRK[4]
TNWRK[4]
TPWRK[3]
TNWRK[3]
TPWRK[2]
TNWRK[2]
TPWRK[1]
TNWRK[1]
Analog
LVDS
Output
M1
M2
K1
K2
K3
K4
J2
J3
Transmit Working Serial Data.
The differential
transmit working serial data links
(TPWRK[3:0]/TNWRK[3:0]) carries the transmit
SONET/SDH STS-48 frame data to a downstream
working sink, in bit serial format. Each differential pair
carries a constituent STS-12 of the transmit working
stream.
Data on TPWRK/TNWRK is encoded in an 8B/10B
format extended from IEEE Std. 802.3. The 8B/10B
character bit ‘a(chǎn)’ is transmitted first and the bit ‘j’ is
transmitted last. The four differential pairs in
TPWRK[3:0]/TNWRK[3:0] are frequency locked but not
phase locked. TPWRK[3:0]/TNWRK[3:0] are nominally
777.6 Mbps data streams.
TPWRK[3:0]/TNWRK[3:0] may be left floating if
unused.
TPPROT[4]
TNPROT[4]
TPPROT[3]
TNPROT[3]
TPPROT[2]
TNPROT[2]
TPPROT[1]
TNPROT[1]
Analog
LVDS
Output
V1
V2
U2
U3
T1
T2
T3
T4
Transmit Protect Serial Data.
The differential transmit
protection serial data links
(TPPROT[3:0]/TNPROT[3:0]) carries the transmit
SONET/SDH STS-48 frame data to a downstream
protection sink, in bit serial format. Each differential
pair carries a constituent STS-12 of the transmit
protection stream.
Data on TPPROT/TNPROT is encoded in an 8B/10B
format extended from IEEE Std. 802.3. The 8B/10B
character bit ‘a(chǎn)’ is transmitted first and the bit ‘j’ is
transmitted last. The four differential pairs in
TPPROT[3:0]/TNPROT[3:0] are frequency locked but
not phase locked. TPPROT[3:0]/TNPROT[3:0] are
nominally 777.6 Mbps data streams.
TPPROT[3:0]/TNPROT[3:0] may be left floating if
unused.
TJ0FP
Output
AV33
Transmit Serial Interface Frame Pulse.
The transmit
serial interface frame pulse signal (TJ0FP) provides
system timing of the transmit serial interface. TJ0FP is
set high once every 9720 SYSCLK cycles to indicate
that the J0 frame boundary 8B/10B character has been
serialized out on both the differential transmit working
LVDS bus (TPWRK[3:0]/TNWRK[3:0]) and the
differential transmit protection LVDS bus
(TPWRK[3:0]/TNWRK[3:0]). TJ0FP is updated on the
rising edge of SYSCLK.
RES
Analog Input
AC3
Reference Resistor Connection.
An off-chip 3.16k
±1% resistor is connected between these the positive
resistor reference pin RES and a Kelvin ground contact
RESK. An on-chip negative feedback path will force
the 0.8V reference voltage onto RES, therefore forcing
252μA of current to flow through the resistor.