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ZL50073 Datasheet(PDF) 15 Page - Zarlink Semiconductor Inc

Part No. ZL50073
Description  32 K Channel Digital Switch with High Jitter Tolerance, Rate Conversion per Group of 4 Streams (8, 16, 32 or 64 Mbps), and 128 Inputs and 128 Outputs
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Maker  ZARLINK [Zarlink Semiconductor Inc]
Homepage  http://www.zarlink.com
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ZL50073
Data Sheet
15
Zarlink Semiconductor Inc.
The ZL50073 uses the ST-BUS/GCI-Bus master input frame pulse (FPi0) and the ST-BUS/GCI-Bus master input
clock (CKi0) to define the input frame boundary and timing for sampling the ST-BUS/GCI-Bus input streams with
various data rates (8.192 Mbps, 16.384 Mbps, 32.768 Mbps or 65.536 Mbps). The rate of the input clock is defined
by setting the CK_SEL1 - 0 pins. In addition, two more frame pulses and clocks can be accepted. The frequencies
of these signals are automatically detected by the ZL50073.
A selectable Motorola or Intel compatible non-multiplexed microprocessor port allows users to program the device
to operate in various modes under different switching configurations. Users can use the microprocessor port to
perform internal register and memory read and write operations. The microprocessor port can be selectable to be
either a 32 bit or 16 bit data bus and to have either a 19 bit or 17 bit address bus. This is selected by setting the
D16B pin. There are seven control signals (CS, DS, R/W, DTA, WAIT, BERR and IM).
The device supports the mandatory requirements for the IEEE 1149.1 (JTAG) standard via the test port.
1.2
Switch Operation
The ZL50073 switches 64 kbps and Nx64 kbps data and voice channels from the TDM input streams, to timeslots
in the TDM output streams. The device is non-blocking; all 32 K input channels can be switched through to the
outputs. Any input channel can be switched to any available output channel.
Figure 2 - 32 K x 32 K Channel Basic Switch Configuration
The maximum channel switching capacity is determined by the number of streams and their rate of operation, as
shown in Table 1.
† The maximum capacity shown is when all streams are at the same rate, and none are operating at 8.192 Mbps.
‡ Switch capacity is limited to less than 32 K channels, only when streams are provisioned at 8 Mbps. The maximum switch capacity in this case
is given by 32,768 - (N x 128), where N is the number of 8 Mbps input or output streams.
TDM Group
Data Rate
Maximum Number
of Input TDM Data
Streams
Maximum Number
of Output TDM
Data Streams
Number of
64 kbps Channels
per Stream
Maximum Switch
Capacity(streams
x channels = total)
65.536 Mbps
32
32
1024
32 x 1024 = 32,768
32.768 Mbps
64
64
512
64 x 512 = 32,768
16.384 Mbps
128
128
256
128 x 256 = 32,768
8.192 Mbps
128
128
128
128 x 128 = 16,384
Table 1 - Data Rate and Maximum Switch Size
ZL50073
TDM INPUT
TDM OUTPUT
128 Streams
128 Streams
STiA0
SToA0
32K x 32K
Input Group 0
STiB0
STiC0
STiD0
STiA31
STiB31
STiC31
STiD31
Input Group 31
SToB0
SToC0
SToD0
Output Group 0
SToA31
SToB31
SToC31
SToD31
Output Group 31




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