ZL50070GAC ZARLINK [Zarlink Semiconductor Inc], ZL50070GAC Datasheet - Page 17

• Manufacturer Part Number: ZL50070GAC
• Description: 24 K Channel Digital Switch with High Jitter Tolerance, Rate Conversion per Group of 4 Streams (8, 16, 32 or 64 Mbps), and 96 Inputs and 96 Outputs
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

For 65 Mbps operation, only those inputs and outputs in the TDM ’A’ streams are active. For 32 Mbps operation,
only those inputs and outputs in the TDM ’A’ and ’B’ streams are active. For 16 Mbps and 8 Mbps, inputs and
outputs in TDM ’A’, ’B’, ’C’ and ’D’ streams are active.
Note that if the internal system clock is not used as the clock source, there are limitations on the maximum data
rate. See Figure 2.0 for more details.
1.4.1
See Section 14.4, Group Control Registers, for programming details. The data rates are set with the Input Stream
Bit Rate (bits 3 - 2) and the Output Stream Bit Rate (bits 19 - 18) in the Group Control Registers 0 - 23 (GCR0 - 23)
For the ZL50070, the bit rates of the inputs and outputs are programmed independently, in groups of 4 streams.
Depending on the rate programmed, the active streams in the group will be as indicated in Table 2.
For example:
•
•
•
An example of ZL50070 mixed rate provisioning is given in Figure . In this example, the output streams follow the
same data rate as the input streams. The example shows that it is possible to have different groups operating at
different data rates. The first eight groups are operating in 65.536 Mbps mode (8192 channels - 8 streams), the next
eight groups are operating in 32.768 Mbps (8192 channels - 16 streams with two streams in each group) and the
remaining eight groups are operating in 16.384 Mbps (8192 channels - 32 streams with four streams per group).
This results in the full capacity usage of the ZL50070.
if input stream group #1 is programmed for 65 Mbps: STiA1 is active; STiB1, STiC1, STiD1 are not active
if output stream group #15 is programmed for 32 Mbps: SToA15 and SToB15 are active; SToC15 and
SToD15 are not active (outputs are tri-stated)
if input stream group #23 is programmed for 16 Mbps or 8 Mbps, STiA23, STiB23, STiC23, STiD23 are all
active
outputs is independent and different settings are possible.
Note:Although this example shows the same rate provisioned for corresponding STi and STo streams, programming of input and
Per Group Rate Selection
16 - 23 at 16 Mbps
8 - 15 at 32 Mbps
Figure 3 - ZL50070 24 K x 24 K Channel and Stream Provisioning Example at Multiple Rates
Example:
Input and Output Groups 0 - 7 at 65 Mbps
Input and Output Groups 8 - 15 at 32 Mbps
Input and Output Groups 16 - 23 at 16 Mbps
0 - 7 at 65 Mbps
Input Groups
Input Groups
Input Groups
STiD16 - 23 at 16 Mbps
STiA16 - 23 at 16 Mbps
STiB16 - 23 at 16 Mbps
STiC16 -23 at 16 Mbps
STiA8 - 15 at 32 Mbps
STiB8 - 15 at 32 Mbps
STiA0 - 7 at 65 Mbps
STiB0 - 7 Not Active
STiC0 - 7 Not Active
STiD0 - 7 Not Active
STiC8 - 15 Not Active
STiD8 - 15 Not Active
Zarlink Semiconductor Inc.
ZL50070
24 K x 24 K
ZL50070
17
SToC16 - 23 at 16 Mbps
SToD16 - 23 at 16 Mbps
SToA16 - 23 at 16 Mbps
SToB16 - 23 at 16 Mbps
SToA8 - 15 at 32 Mbps
SToB8 - 15 at 32 Mbps
SToA0 - 7 at 65 Mbps
SToC0 - 7 Not Active
SToB0 - 7 Not Active
SToD0 - 7 Not Active
SToC8 - 15 Not Active
SToD8 - 15 Not Active
8 - 15 at 32 Mbps
16 - 23 at 16 Mbps
0 - 7 at 65 Mbps
Output Groups
Output Groups
Output Groups
Data Sheet