參數(shù)資料
型號(hào)： MT8986AL
廠(chǎng)商： Toshiba Corporation
英文描述： CMOS ST-BUS Family Multiple Rate Digital Switch
中文描述： 意法半導(dǎo)體的CMOS總線(xiàn)家庭多速率數(shù)字開(kāi)關(guān)
文件頁(yè)數(shù)： 14/46頁(yè)
文件大?。?/td> 765K
代理商： MT8986AL
MT8986
Data Sheet
14
Zarlink Semiconductor Inc.
Initialization of the MT8986
On initialization or power up, the contents of the Connection Memory High can be in any state. This is a potentially
hazardous condition when multiple MT8986 ST-BUS outputs are tied together to form matrices, as these outputs
may conflict. The ODE pin should be held low on power up to keep all outputs in the high impedance condition.
During the microprocessor initialization routine, the microprocessor should program the desired active paths
through the matrices, and put all other channels into the high impedance state. Care should be taken that no two
ST-BUS outputs drive the bus simultaneously. When this process is complete, the microprocessor controlling the
matrices can bring the ODE signal high to relinquish high impedance state control to the CMH
b
0s.
Control Register - Read/Write
Figure 3 - Control Register Description
BIT
NAME
DESCRIPTION
7
SM
Split Memory.
When 1, all subsequent reads are from the Data Memory and writes are to the
Connection Memory 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.
6
ME
Message Enable.
When 1, the contents of the Connection Memory Low are output on the Serial
Output streams except when in High Impedance as set by the ODE input. When 0, the Connection
Memory bits for each channel determine what is output.
5
STA3
Stream Address Bit 3.
This bit is used in the 44 pin packages when 16 x 8 switching configuration
is selected. It is used with STA2-0 to select one of the 16 input data streams whenever the Data
Memory is to be read. The programming of this bit has no effect in other switching configurations.
4-3
MS1-0
Memory Select Bits.
The memory select bits operate as follows:
0-0 - Not to be used
0-1 - Data Memory (read only from the CPU)
1-0 - Connection Memory Low
1-1 - Connection Memory High
2-0
STA2-0
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.
The use of these bits depends on the switching configuration as well as the device’s main operation
defined by the DMO bit of the Interface Mode Selection register. Tables 6 and 7 show the
utilization of these bits according to the device’s main operation.
Identical
I/O
Rate
# of Input x
Output
Streams
STA bits used to
select subsections of
the Data
Memory
STA bits used to
select subsections of
the Connection
Memory
Input Address pins used to
select individual Connection
and Data Memory positions
within the selected subsection
2 Mb/s
8x8
STA2, STA1, STA0
STA2, STA1, STA0
A4, A3, A2, A1, A0
2 Mb/s *
4x4 *
STA1, STA0
STA1, STA0
A4, A3, A2, A1, A0
SM
ME
STA3
MS1
MS0
STA2
STA1
STA0
7
6
5
4
3
2
1
0
相關(guān)PDF資料
PDF描述
MT8986 CMOS ST-BUS⑩ FAMILY Multiple Rate Digital Switch
MT8986AC CMOS ST-BUS⑩ FAMILY Multiple Rate Digital Switch
MT8986AE CMOS ST-BUS⑩ FAMILY Multiple Rate Digital Switch
MT8986AL CMOS ST-BUS⑩ FAMILY Multiple Rate Digital Switch
MT8986AP CMOS ST-BUS⑩ FAMILY Multiple Rate Digital Switch
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT8986AL1 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 256 X 256/512 X 256/128 X 128 131.072MBPS 5V 44M - Trays 制造商:Zarlink Semiconductor Inc 功能描述:SWIT FABRIC 256 X 256/512 X 256/128 X 128 131.072MBPS 5V 44M - Trays
MT8986AP 制造商:Microsemi Corporation 功能描述:
MT8986AP1 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 256 X 256/512 X 256/128 X 128 131.072MBPS 5V 44P - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TDM/TSI SWITCH 512X256 44PLCC 制造商:Microsemi Corporation 功能描述:IC TDM/TSI SWITCH 512X256 44PLCC
MT8986APR 制造商:TOSHIBA 制造商全稱(chēng):Toshiba Semiconductor 功能描述:CMOS ST-BUS Family Multiple Rate Digital Switch
MT8986APR1 制造商:Microsemi Corporation 功能描述:SWITES 44PLCC - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TDM/TSI SWITCH 512X256 44PLCC 制造商:Microsemi Corporation 功能描述:IC TDM/TSI SWITCH 512X256 44PLCC
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