zl50060gag2 Zarlink Semiconductor, zl50060gag2 Datasheet - Page 23
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zl50060gag2
Manufacturer Part Number
zl50060gag2
Description
16 K Channel Digital Switch With High Jitter Tolerance, Per Stream Rate Conversion 2, 4, 8, 16 Or 32 Mbps , 64 Input And 64 Output Streams Pin Compatible With Mt90869
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50060GAG2.pdf
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2.0
2.1
The device supports five switching configurations: (1) Unidirectional switch, (2) Backplane-to-Local, (3)
Local-to-Backplane, (4) Backplane-to-Backplane, and (5) Local-to-Local. The following sections describe the
switching paths in detail. Configurations (2) - (5) enable a non-blocking bi-directional switch with 8,192 Backplane
input/output channels at Backplane stream data rates of 16.384 Mbps or 32.768 Mbps, and 8,192 Local
input/output channels at Local stream data rates of 16.384 Mbps or 32.768 Mbps. The switching paths of
configurations (2) to (5) may be operated simultaneously. When the lower data-rates of 8.192, 4.096 and
2.048 Mbps are included, there will be a corresponding reduction in switch capacity although conversion between
differing rates will be maintained.
2.1.1
The device can be configured as a 16,384 x 16,384 unidirectional switch by grouping together all input streams and
all output streams. All streams can be operated at a data rate of 16.384 Mbps or 32.768 Mbps, or a combination of
16.384 Mbps and 32.768 Mbps (i.e., one rate on the Local streams and the other rate on the Backplane streams).
Lower data rates may be used with a corresponding reduction in switch capacity.
2.1.2
The device can provide data switching between the Backplane input port and the Local output port. The Local
Connection Memory determines the switching configurations.
2.1.3
The device can provide data switching between the Local input port and the Backplane output port. The Backplane
Connection Memory determines the switching configurations.
2.1.4
The device can provide data switching between the Backplane input and output ports. The Backplane Connection
Memory determines the switching configurations.
2.1.5
The device can provide data switching between the Local input and output ports. The Local Connection Memory
determines the switching configurations.
2.1.6
The bit rate for each input stream is selected by writing to dedicated input bit rate registers, BIBRR0 to BIBRR31 for
Backplane Input Bit Rate Registers (see Table 50) and LIBRR0 to LIBRR31 for Local Input Bit Rate Registers (see
Table 46).
The bit rate for each output stream is selected by writing to dedicated output bit rate registers, BOBRR0 to
BOBRR31 for Backplane Output Bit Rate Registers (see Table 52) and LOBRR0 to LOBRR31 for Local Output Bit
Rate Registers (see Table 48).
If the Backplane 32 Mbps Mode is selected by setting the Control Register bit MODE32B HIGH, the settings in
BIBRRn and BOBRRn are ignored. Similarly, if the Local 32 Mbps Mode is selected by setting the Control Register
bit MODE32L HIGH, the settings in LIBRRn and LOBRRn are ignored.
Switching Configuration
Functional Description
Unidirectional Switch
Backplane-to-Local Path
Local-to-Backplane Path
Backplane-to-Backplane Path
Local-to-Local Path
Port Data Rate Modes and Selection
Zarlink Semiconductor Inc.
ZL50060/1
23
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