參數(shù)資料
型號: MT8981DP1
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 路由/交換
英文描述: ISO-CMOS ST-BUS
中文描述: TELECOM, DIGITAL TIME SWITCH, PQCC44
封裝: LEAD FREE, PLASTIC, MS-018AC, LCC-44
文件頁數(shù): 7/20頁
文件大?。?/td> 481K
代理商: MT8981DP1
MT8981D
Data Sheet
7
Zarlink Semiconductor Inc.
Figure 5 - Connection Memory High Bits
Figure 6 - Connection Memory Low Bits
Bit
Name
Description
2
Message
Channel
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
Unused
0
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.
Bit
Name
Description
7
(Unused)
Must be a 0.
6-5*
Stream
Address
Bits*
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.
4-0*
Channel
Address
Bits*
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.
*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.
7
6
5
4
3
2
1
0
No Corresponding Memory
- These bits give 0s if read.
Per Channel
Control Bits
7
6
5
4
3
2
1
0
(unused)
Stream
Address
Bits
Channel
Address
Bits
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