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參數(shù)資料
| 型號： | MT90863 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | 3V Rate Conversion Digital Switch(3V 速率轉換數(shù)字開關) |
| 中文描述： | 3V的速率轉換數(shù)字交換機（3V的速率轉換數(shù)字開關） |
| 文件頁數(shù)： | 14/35頁 |
| 文件大?。?/td> | 168K |
| 代理商： | MT90863 |
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MT90863
Advance Information
14
The BV/C (Variable/Constant Delay) bit of each
backplane connection memory location allows the
per-channel selection between variable and constant
throughput delay modes for all STio channels.
In message mode, the message channel (BMC) bit
of the backplane connection memory enables (if
high) an associated STio output channel. If the BMC
bit is low, the contents of the backplane connection
memory stream address bit (BSAB) and channel
address bit (BCAB) defines the source information
(stream and channel) of the time-slot that will be
switched to the STio streams. When message mode
is enabled, only the lower half (8 least significant
bits)
of
the
backplane
transferred to the STio pins.
connection
memory
is
Local Connection Memory Control
The local connection memory controls the local
interface switching configuration. Local connection
memory is split into high and low parts. Locations in
local
connection
memory
particular STo output streams.
The L/B (Local/Backplane Select) bit of each local
connection memory location allows per-channel
selection of source streams from local or backplane
interface.
are
associated
with
The LV/C (Variable/Constant Delay) bit of each local
connection memory location allows the per-channel
selection between variable and constant throughput
delay modes for all STo channels.
In message mode, the local connection memory
message channel (LMC) bit enables (if high) an
associated STo output channel. If the LMC bit is low,
the contents of the stream address bit (LSAB) and
the
channel
address
bit
connection memory defines the source information
(stream and channel) of the time-slot that will be
switched to the STo streams. When message mode
is enabled, only the lower half (8 least significant
bits) of the local connection memory low bits are
transferred to the STo pins.
(LCAB)
of
the
local
When sub-rate switching is enabled, the LSR0-1 bits
in the local connection memory high define which bit
position contains the sub-rate data.
DTA Data Transfer Acknowledgment Pin
The DTA pin is driven LOW by internal logic to
indicate (to the CPU) that a data bus transfer is
complete. When the bus cycle ends, this pin drives
HIGH and then switches to the high-impedance
state. If a short or signal contention prevents the DTA
pin from reaching a valid logic HIGH, it will continue
to drive for approximately 15nsec before switching to
the high-impedance state.
Initialization of the MT90863
During power up, the TRST pin should be pulsed low,
or held low continuously, to ensure that the MT90863
is in the normal operation mode. A 5K
pull-down
resistor can be connected to this pin so that the
device will not enter the JTAG test mode during
power up.
After power up, the contents of the connection
memory can be in any state. The ODE pin should be
held low after power up to keep all serial outputs in a
high impedance state until the microprocessor has
initialized
the
switching
prevents two serial outputs from driving the same
stream simultaneously.
matrix.
This
procedure
During the microprocessor initialization routine, the
microprocessor should program the desired active
paths
through
the
switch.
programming feature can also be used to quickly
initialize the DC and OE bit in the backplane and
local connection memory respectively.
The
memory
block
When this process is complete, the microprocessor
controlling the matrices can either bring the ODE pin
high or enable the OSB bit in IMS register to
relinquish the high impedance state control.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MT90863AG | 制造商:Microsemi Corporation 功能描述:RATE CONVERSION DIGITAL SWITCH - Trays 制造商:Microsemi Corporation 功能描述:Microsemi MT90863AG Communication Misc 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC DGTL SWITCH RCDX 144PBGA 制造商:Microsemi Corporation 功能描述:IC DGTL SWITCH RCDX 144PBGA |
| MT90863AG1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:3V Rate Conversion Digital Switch |
| MT90863AG2 | 制造商:Microsemi Corporation 功能描述:SWITES 144BGA - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC DGTL SWITCH RCDX 144PBGA 制造商:Microsemi Corporation 功能描述:IC DGTL SWITCH RCDX 144PBGA |
| MT90863AL | 制造商:Microsemi Corporation 功能描述:RATE CONVERSION DIGITAL SWITCH - Trays |
| MT90863AL1 | 制造商:Microsemi Corporation 功能描述:PB FREE RATE CONVERSION DIGITAL SWITCH - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC DGTL SWITCH RCDX 128MQFP |
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