zl50058 Zarlink Semiconductor, zl50058 Datasheet - Page 3

• 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

Device Overview
The ZL50057 and ZL50058 are two different packages of the same device. The ZL50057/8 has two data ports, the
Backplane and the Local port. The Backplane port has two independent modes of operation, either 32 input and 32
output streams operated at 2.048 Mbps, 4.096 Mbps, 8.192 Mbps or 16.384 Mbps, in any combination, or 16 input
and 16 output streams operated at 32.768 Mbps. The Local port has two independent modes of operation, either 16
input and 16 output streams operated at 2.048 Mbps, 4.096 Mbps, 8.192 Mbps or 16.384 Mbps, in any
combination, or 8 input and 8 output streams operated at 32.768 Mbps.
The ZL50057/8 contains two data memory blocks (Backplane and Local) to provide the following switching path
configurations:
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The device contains two connection memory blocks, one for the Backplane output and one for the Local output.
Data to be output on the serial streams may come from either of the data memories (Connection Mode) or directly
from the connection memory contents (Message Mode).
In Connection Mode, the contents of the connection memory define, for each output stream and channel, the
source stream and channel (stored in data memory) to be switched.
In Message Mode, microprocessor data can be written to the connection memory for broadcast on the output
streams on a per channel basis. This feature is useful for transferring control and status information to external
circuits or other ST-BUS devices.
The device uses a master frame pulse (FP8i) and master clock (C8i) to define the input frame boundary and timing
for both the Backplane port and the Local port. The device will automatically detect whether an ST-BUS or a GCI-
Bus style frame pulse is being used. There is a two-frame delay from the time RESET is de-asserted to the
establishment of full switch functionality. During this period, the input frame pulse format is determined before
switching begins.
The device provides FP8o, FP16o, C8o and C16o outputs to support external devices connected to the outputs of
the Backplane and Local ports.
A non-multiplexed Motorola microprocessor port allows programming of the various device operation modes and
switching configurations. The microprocessor port provides access for Register read/write, Connection Memory
read/write and Data Memory read-only operations. The port has a 15-bit address bus, 16-bit data bus and 4 control
signals. The microprocessor may monitor channel data in the Backplane and Local data memories.
The mandatory requirements of the IEEE-1149.1 (JTAG) standard are fully supported via a dedicated test port.
The ZL50057 and ZL50058 are each available in one package:
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Input-to-Output Unidirectional, supporting 12 K x 12 K switching
Backplane-to-Local Bi-directional, supporting 8 K x 4 K data switching,
Local-to-Backplane Bi-directional, supporting 4 K x 8 K data switching,
Backplane-to-Backplane Bi-directional, supporting 8 K x 8 K data switching.
Local-to-Local Bi-directional, supporting 4 K x 4 K data switching.
ZL50057: a 27 mm x 27 mm body, 1.27mm ball-pitch, 272-PBGA.
ZL50058: a 17 mm x 17 mm body, 1mm ball-pitch, 256-PBGA.
Zarlink Semiconductor Inc.
ZL50057/8
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Data Sheet