mt8981de1 Zarlink Semiconductor, mt8981de1 Datasheet - Page 6

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

4-3
1-0
Bit
7
6
5
2
Split Memory When 1, all subsequent reads are from the Data Memory and writes are to the Connection Memory
Address Bits
Select Bits
(unused)
(unused)
Message
Memory
Stream
Name
Mode
Low, except when the Control Register is accessed again. When 0, the Memory Select bits specify
the memory for subsequent operations. In either case, the Stream Address Bits select the subsection
of the memory which is made available.
When 1, the contents of the Connection Memory Low are output on the Serial Output streams
except when the ODE pin is low. When 0, the Connection Memory bits for each channel determine
what is output.
0-0 - Not to be used
0-1 - Data Memory (read only from the microprocessor port)
1-0 - Connection Memory Low
1-1 - Connection Memory High
Must be a 0.
The number expressed in binary notation on these bits refers to the input or output ST-BUS stream
which corresponds to the subsection of memory made accessible for subsequent operations.
7
Control
Mode
Bits
6
Figure 4 - Control Register Bits
(unused)
5
Zarlink Semiconductor Inc.
MT8981D
4
Memory
Select
Bits
6
3
Description
(unused)
2
1
Address
Stream
Bits
0
Data Sheet