MT8981D
ISO-CMOS
No Corresponding Memory
- These bits give 0s if read.
Per Channel
Control Bits
7
6
5
4
3
2
1
0
BIT
2
NAME
Message
Channel
DESCRIPTION
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.
1
0
Unused
Output
Enable
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.
Figure 5 - Connection Memory High Bits
(unused)
Stream
Address
Bits
Channel
Address
Bits
7
6
5
4
3
2
1
0
BIT
7
6-5*
NAME
(Unused)
Stream
Address
Bits*
Channel
Address
Bits*
Must be a 0.
DESCRIPTION
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.
4-0*
*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.
Figure 6 - Connection Memory Low Bits
2-22
MITEL [ MITEL NETWORKS CORPORATION ]
