mt8986al1 Zarlink Semiconductor, mt8986al1 Datasheet - Page 18

• Manufacturer Part Number: mt8986al1
• Description: Multiple Rate Digital Switch
• Manufacturer: Zarlink Semiconductor

x=Don’t care
BIT
4-3
6
5
2
1
0
CAB6-5
NAME
SAB3
CSTo
V/C
MC
OE
Variable/Constant Throughput Delay Mode. This bit is used to select between Variable (LOW)
and Constant Delay (HIGH) modes in a per-channel basis. Tables 1 and 2 describe the switching
configurations that have this function. In the modes where this function is not available, this bit
has not effect.
Source Stream Address bit 3. This bit is used along with bits SAB0-2 in CML to select up to 16
different source streams for the connection. Depending on the state of DMO bit and the switching
configuration enabled, not all SAB3-0 bits have to be used.
See Tables 9 and 10 for details on the utilization of the SAB bits.
Source Channel Address bits 5 and 6. These two bits are used together with bits CAB0-4 in
Connect Memory Low to select up 128 different source channels for the connection. Depending
on the data rate used in the input/output streams, 5, 6 or all 7 CAB bits can be used respectively, to
select 32, 64 or 128 different channels.
Message Channel. When 1, the contents of the corresponding location in Connection Memory
Low are output on the corresponding channel and stream. When 0, the contents of the
programmed location in Connection Memory Low act as an address for the Data Memory and so
determine the source of the connection to the location’s channel and stream.
CSTo Bit. This bit is only available in 2.048 Mb/s applications. It drives a bit time on the CSTo
output pin.
Output Enable. This bit enables the output drivers on a per-channel basis. This allows individual
channels on individual streams to be made high-impedance, allowing switch matrices to be
constructed. A HIGH enables the driver and a LOW disables it.
See Tables 9 and 10 for details on the utilization of the CAB bits.
X
7
Figure 5 - Connection Memory High (CMH) Bits
Connection Memory High - Read/Write
V/C
6
SAB3
5
Zarlink Semiconductor Inc.
CAB6
MT8986
(CM high bits)
4
18
CAB5
3
DESCRIPTION
MC
2
CSTo
1
OE
0
Data Sheet