mt8981de1 Zarlink Semiconductor, mt8981de1 Datasheet - Page 7

• Manufacturer Part Number: mt8981de1
• Description: Digital Switch
• Manufacturer: Zarlink Semiconductor

*If bit 2 of the corresponding Connection High location is 1 or if bit 6 of the Control Register is 1, then these entire 8 bits are
output on the channel and stream associated with this location. Otherwise, the bits are used as indicated to define the source
of the connection which is output on the channel and stream associated with this location.
6-5*
4-0*
Bit
Bit
2
1
0
7
(Unused)
Message
Channel
Channel
Address
Address
Unused
Output
Enable
Stream
Name
Name
Bits*
Bits*
When 1, the contents of the corresponding location in Connection Memory Low are output on the
location’s channel and stream. When 0, the contents of the corresponding 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.
If the ODE pin is high and bit 6 of the Control Register is 0, then this bit enables the output driver
for the location’s channel and stream. This allows individual channels on individual streams to be
made high-impedance, allowing switching matrices to be constructed. A 1 enables the driver and a
0 disables it.
Must be a 0.
The number expressed in binary notation on these 2 bits is the number of the ST-BUS stream for
the source of the connection. Bit 6 is the most significant bit. e.g., if bit 6 is 1, and bit 5 is 0, then
the source of the connection is a channel on STi2.
The number expressed in binary notation on these 5 bits is the number of the channel which is the
source of the connection (The ST-BUS stream where the channel lies is defined by bits 6 and 5.).
Bit 4 is the most significant bit. e.g., if bit 4 is 1, bit 3 is 0, bit 2 is 0, bit 1 is 1 and bit 0 is 1, then
the source of the connection is channel 19.
(unused)
7
7
7
No Corresponding Memory
- These bits give 0s if read.
Figure 5 - Connection Memory High Bits
Figure 6 - Connection Memory Low Bits
6
6
6
Address
Stream
Bits
5
5
5
Zarlink Semiconductor Inc.
MT8981D
4
4
4
7
3
3
3
Description
Description
Channel
Address
Bits
2
2
2
Per Channel
Control Bits
1
1
1
0
0
0
Data Sheet