zl50058 Zarlink Semiconductor, zl50058 Datasheet - Page 24

• Manufacturer Part Number: zl50058
• Description: 12 K Channel Digital Switch With High Jitter Tolerance, Per Stream Rate Conversion 2, 4, 8, 16 Or 32 Mbps , 48 Input And 48 Output Streams
• Manufacturer: Zarlink Semiconductor

2.1.7
The Local port has 16 input (LSTi0-15) and 16 output (LSTo0-15) data streams.
The Local streams can be operated in one of two modes, Local Non-32 Mbps Mode and Local 32 Mbps Mode. The
Local stream data rates are not affected by the operating mode of the Backplane port. The operating mode of the
Local side is determined by the state of the Control Register bit MODE32L. Setting this bit HIGH will invoke the
Local 32 Mbps Mode. Setting the bit LOW will invoke the Non-32 Mbps Mode. The default value of this bit on device
reset is LOW. The timing of the input and output clocks and frame pulses is shown in Figure 8, Input and Output
(Generated) Frame Pulse Alignment for Different Data Rates.
Local Non-32 Mbps Mode: Each of the Local streams (LSTi0-15 and LSTo0-15) can be independently programmed
for a data rate of 2.048 Mbps, 4.096 Mbps, 8.192 Mbps or 16.384 Mbps.
Local 32 Mbps Mode: 8 of the Local input streams (LSTi0-7) and 8 of the Local output streams (LSTo0-7) operate at
a fixed rate of 32.768 Mbps. In this mode, the remaining input and output streams are unused.
2.1.7.1
The input traffic on the Local streams are aligned based on the FP8i and C8i input timing signals. Each input
stream, LSTi0-15, can be individually set to operate at 2.048 Mbps, 4.096 Mbps, 8.192 Mbps or 16.384 Mbps by
programming the LIBR1-0 bits in the Local Input Bit Rate Register (LIBRR0-15). The Local streams can also be set
to operate at 32.768 Mbps. When the MODE32L bit in the Control Register is set high, the first 16 input streams,
LSTi0-7, operate at 32.768 Mbps and the remaining 16 streams, LSTi8-15, will not be used and must be connected
to a defined logic level.
2.1.7.2
The output traffic on the Local streams are aligned based on the FP8o and C8o output timing signals. Operation of
stream data in Connection Mode or Message Mode is determined by the state of the LMM bit of the Local
Connection Memory. The channel high impedance state is controlled by the LE bit of the Local Connection Memory.
Local Input streams - LSTi0-7
Local Input streams - LSTi8-15
Backplane Input streams - BSTi0-15
Backplane Input streams - BSTi16-31
Local Output streams - LSTo0-7
Local Output streams - LSTo8-15
Backplane Output streams - BSTo0-15
Backplane Output streams - BSTo16-31
Local Port Rate Selection
Local Input Port
Local Output Port
Stream Numbers
Table 1 - Per-stream Input and Output Data Rate Selection: Backplane and Local
2.048, 4.096, 8.192 or 16.384 Mbps in Local Non-32 Mbps Mode.
All streams at 32.768 Mbps in Local 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Local Non-32 Mbps Mode.
Unused in Local 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Backplane Non-32 Mbps Mode.
All streams at 32.768 Mbps in Backplane 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Backplane Non-32 Mbps Mode.
Unused in Backplane 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Local Non-32 Mbps Mode.
All streams at 32.768 Mbps in Local 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Local Non-32 Mbps Mode.
Unused in Local 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Backplane Non-32 Mbps Mode.
All streams at 32.768 Mbps in Backplane 32 Mbps Mode.
2.048, 4.096, 8.192 or 16.384 Mbps in Backplane Non-32 Mbps Mode.
Unused in Backplane 32 Mbps Mode.
Zarlink Semiconductor Inc.
ZL50057/8
Rate Selection Capability (for each individual stream)
24
Data Sheet