mt89l85apr1 Zarlink Semiconductor, mt89l85apr1 Datasheet - Page 9

• Manufacturer Part Number: mt89l85apr1
• Description: 256 X 256 Channels 8 Tdm Streams At 2.048 Mbps 3.3 V Non-blocking Enhance Digital Switch Edx With Constant Delay Mode
• Manufacturer: Zarlink Semiconductor

x = Don’t care
4-0*
7-5
Bit
Bit
6
2
1
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.
CAB4-0*
SAB2-0*
Name
Name
CSTo
V/C
MC
OE
Variable/Constant Throughput Delay Mode. This bit is used to select between Variable (LOW)
and Constant Delay (HIGH) modes on a per-channel basis.
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 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.
Source Stream Address bits. These three bits are used to select eight source streams for the
connection. Bit 7 of each word is the most significant bit.
Source Channel Address bits 0-4. These five bits are used to select 32 different source channels
for the connection (The ST-BUS stream where the channel is present is defined by bits SAB2-0).
Bit 4 is the most significant bit.
SAB2
7
X
7
SAB1
Figure 5 - Connection Memory High Bits
V/C
Figure 6 - Connection Memory Low Bits
6
6
SAB0
5
X
5
Zarlink Semiconductor Inc.
MT89L85
CAB4
4
X
4
9
CAB3
3
3
X
Description
Description
CAB2
MC
2
2
CSTo
CAB1
1
1
CAB0
OE
0
0
Data Sheet