PSB50505EV13GXT Lantiq, PSB50505EV13GXT Datasheet - Page 93
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PSB50505EV13GXT
Manufacturer Part Number
PSB50505EV13GXT
Description
Manufacturer
Lantiq
Datasheet
1.PSB50505EV13GXT.pdf
(290 pages)
Specifications of PSB50505EV13GXT
Lead Free Status / RoHS Status
Supplier Unconfirmed
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FTFRS[7:0]
RFCLK
The receive system clock and transmit system clock are both 8.192 MHz, and may be
independent from each other. The data rate is 2048 Mbit/s. This means that each bit lasts
for 4 clock cycles.
Data on the system internal highway is structured in frames of 256 bits every 125 s . It
is transmitted in 32 slots numbered from 0 to 31 with slot 0 transmitted first. The data bits
of a slot are numbered from 1 to 8. The first transmitted bit ‘bit 1’ is the most significant
bit.
Data Sheet
Figure 23
shows the bit ordering.
0 =
1 =
Framer Transmit Frame Synchronization Pulse
FTFRS is generated at the beginning of timslot 1 of every frame
Reference Clock
• Reference clock for the internal clock recovery circuit
• Depending on p_rx_em in pcfN: Optional emergency clock if
no transition on FRCLK is detected within 23 CLOCK cycles.
The segmentation continues using the RFCLK divided by four,
and using the byte-pattern programmed to a_emg_bpslct in
acfg for the cell payload.
Structured CES: Depending on “p_tx_mfs” in
“pcfN”:
0 = Double frame mode: FTMFS is asserted every
2 frames (250 µs)
1 =
E1 CRC multiframe mode: FTMFS is asserted
every 16 frames (2 ms)
T1 mode: every 3 ms
T1 superframe mode: every 1.5 ms
Unstructured CES: Unused, constant low level
93
PXB 4219E, PXB 4220E, PXB 4221E
Interface Description
IWE8, V3.4
2003-01-20
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