PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 59
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PM5366-PI
Manufacturer Part Number
PM5366-PI
Description
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5366-PI.pdf
(267 pages)
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PRELIMINARY
DATASHEET
PMC-2010672
Pin Name
S77
SDC1FP
PROPRIETARY AND CONFIDENTIAL
Type
Input
I/O
ISSUE 1
Pin
No.
D10 The SBI 77.76 MHz select input determines the
B3
Function
expected frequency of SREFCLK. If S77 is low,
SREFCLK is expected to be 19.44 MHz. If S77 is
high, SREFCLK is expected to be 77.76 MHz and data
is driven and sampled every fourth cycle.
This signal is a don't care when the SYSOPT register
bits are binary 01 (H-MVIP interface). In this mode,
SREFCLK is required to be 19.44 MHz.
S77 must be held static.
SBI Drop C1 Frame Pulse (SDC1FP). The SDC1FP
C1 frame pulse synchronizes devices interfacing to the
Insert SBI bus. The frame pulse indicates SBI bus
multiframe alignment which occurs every 500 µS,
therefore this signal is pulsed every 9720 SREFCLK
cycles (38880 cycles if S77 is high). This signal does
not need to occur every SBI multiframe and is also
used to indicate T1 and E1 multiframe alignment in
synchronous SBI mode by pulsing at multiples of every
12 SBI multiframes (48 T1/E1 frames). In synchronous
locked mode, as selected by the SYNCSBI context bit
programmed through the RX-SBI-ELST Indirect
Channel Data register, SDC1FP pulses every 116640
SREFCLK cycles (466560 cycles if S77 is high). If the
SYNCSBI bit is logic 1 for at least one tributary,
SDC1FP must indicate T1 and E1 multiframe
alignment.
The TEMAP-84 can be configured to generate this
frame pulse. Only one device on the SBI bus should
generate this signal. By default this signal is not
enabled to generate the frame pulse.
If a SDC1FP pulse is received at an unexpected cycle,
the Drop bus with become high-impedence until two
consecutive valid SDC1FP pulses occur.
The system frame pulse is a single SREFCLK cycle
long and is updated on the rising edge of SREFCLK.
47
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84
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