
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
44
Pin Name
Type
Pin
No.
J1
K2
L1
M2
N3
P4
R1
T2
P3
R4
R5
T6
V3
U3
W1
V2
V1
U1
Y1
W2
Function
TXDATA3_p[1]
TXDATA3_n[1]
TXDATA3_p[0]
TXDATA3_n[0]
TXDATA2_p[3]
TXDATA2_n[3]
TXDATA2_p[2]
TXDATA2_n[2]
TXDATA2_p[1]
TXDATA2_n[1]
TXDATA2_p[0]
TXDATA2_n[0]
TXDATA1_p[3]
TXDATA1_n[3]
TXDATA1_p[2]
TXDATA1_n[2]
TXDATA1_p[1]
TXDATA1_n[1]
TXDATA1_p[0]
TXDATA1_n[0]
TXFPI
1
TXDATA4_p/n[3:0] represents the most significant nibble
while TXDATA1_p/n[3:0] represents the least significant
nibble of the transmitted word. TXDATA4_p/n[3] is the most
significant bit (corresponding to bit 1 of each serial word, the
first bit transmitted). TXDATA1_p/n[0] is the least significant
bit (corresponding to bit 16 of each word, the last bit
transmitted). TXDATA[4:1]_p/n[3:0] is updated on the rising
edge of the TXCLK2_p/n.
Input
D2
The
transmit line frame pulse input
provides line timing on
the serial interface. TXFPI rising edge is detected (with a 6
byte blind window) to force re-alignement of the internal line
transmit timings. TXFPO is used to indicate a rought
estimate of the first A1 bytes of the transmitted SONET/SDH
frame. TXFPI can be disabled by setting to 1 the SPECTRA-
9953 transmit configuration 1 TXFPI_DISABLE register bit.
TXFPI is an asynchronous input.
The
transmit line frame pulse output
provide line timing on
the serial interface. TXFPO is set high once every 9720
TXCLK_SRC/8 to roughly indicate that a 125us (first A1 )
frame boundary has been serialized on the line.
For quad-2488 mode, TXFPO[N] is used to indicate rough
alignment on STS-48/STM-16[N] SONET/SDH stream.
For STS-192/STM-64 mode, only TXFPO1 is used to
indicate rough alignment on STS-192/STM-64 data stream.
TXFPO2_4 should be ignored.
TXFPO is an asynchronous output.
TXFPO[4]
TXFPO[3]
TXFPO[2]
TXFPO[1]
Output
J7
E3
G5
C1
1
TXFPI and TXFPO are considered dirty frame pulse indicators. They do not indicate the exact
frame boundary byte position. Instead an approximate A1 byte is indicated. This allows easy
and quick external alignment and framing algorithms to be implemented.