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參數(shù)資料
| 型號(hào)： | MT90221AL |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Quad IMA/UNI PHY Device |
| 中文描述： | 四IMA的/單向物理層設(shè)備 |
| 文件頁(yè)數(shù)： | 34/114頁(yè) |
| 文件大?。?/td> | 304K |
| 代理商： | MT90221AL |
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MT90221
26
Figure 9 - PCM Mode 2 and 6: ST-BUS Interface for T1 (Spaced Mapping
Figure 10 - PCM Mode 2 and 6: ST-BUS Interface for T1 (Grouped Mapping)
ST-BUS
Bit Cells
(DSTx0-3)
Serial Bit
Stream
Bit Cell
TXSYNC0-3
RXSYNC0-3
TXCK 0-3
RXCK 0-3
Bit Cell
...
...
...
...
...
...
...
...
ST-BUS
Bit Cells
at DSTx0-3
Chan. N bit 7
Serial Bit
Stream
Bit Cell
TXSYNC0-3
RXSYNC0-3
TXCK 0-3
RXCK 0-3
Bit Cell
...
...
...
...
...
...
...
...
Chan. N-1 bit 0
Chan. N+1 bit 7
Chan. N bit 0
Chan. 0 bit 7
Chan. 31 bit 0
Chan. 1 bit 7
Chan. 0 bit 0
NOTE: The value N is 0, 4, 8, 12, 16, 20, 24 or 28 and corresponds to the unused channels.
Unused or
High Impedance
Unused or
High Impedance
Unused or
High Impedance
Unused or
High Impedance
Serial Bit
Stream
Bit Cell
Bit Cell
Bit Cell
Unused or
High Impedance
High Impedance
...
...
TXSYNC
RXSYNC
RXCK
...
...
...
...
Unused or
TXCK
...
...
Bit Cells
at DSTx0-3
Channel 31 bit 0
Channel 0 bit 7
Channel 0 bit 6
Channel 23 bit 0
Channel 24 bit 7
4.2.1.2
Detailed ST-BUS Grouped Mapping
(24 Consecutive Channels)
In this option, the 24 bytes of serial voice/data
channels of the DS-1 use the first 24 consecutive
channels over the 32 ST-BUS channels. The
MT90221 tri-states the DSTo lines for the unused
channels (25 - 31). Refer to Table 9.
4.2.1.3
Detailed ST-BUS ISDN Mapping
(T1 ISDN Modes)
When the T1 ISDN modes are selected, channel 24
is not used to carry bytes from ATM cells. This byte is
not used in the receive direction. In the transmit
direction it is set to a high impedance state. The ST-
BUS mapping is identical as in the T1 (DS1) ’clear
channel’ set-up except for the last channel of the T1
(DS1) frame. This last channel is reserved for
signaling.
4.2.2
The MITEL ST-BUS has 32 channels, numbered 0 to
31. The PCM-30 payload is mapped to 30 of the 32
ST-BUS timeslots. Channels 0 and 16 are used for
framing and signaling information. See Figure 11
and Table 10.
Mode 4 and 8: ST-BUS lnterface for E1
In E1 PCM Modes 4 and 8, the MITEL ST-BUS clock
value is 4.096 MHz. The frame pulse is 8 kHz and
should be as defined in Figure 11.
In PCM Mode 4, the TXCK and TXSYNC pins are
defined as inputs and are generated by external
circuitry. In the PCM Mode 8, the TXCK and
TXSYNC pins are defined as outputs. The source for
the TXCK is selected using
TX PCM Link Control
register number 2 and can be any of the four RXCK
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相關(guān)代理商/技術(shù)參數(shù) |
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| MT90222 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:4/8/16 Port IMA/TC PHY Device |
| MT90222AG | 制造商:Microsemi Corporation 功能描述:ATM IMA 40MBPS 2.5V 384BGA - Trays |
| MT90222AG2 | 制造商:Microsemi Corporation 功能描述:ATM IMA 40MBPS 2.5V 384BGA /BAKE/DRYPACK - Trays |
| MT90223AG | 制造商:Microsemi Corporation 功能描述:ATM IMA 80MBPS 2.5V 384BGA - Trays |
| MT90223AG2 | 制造商:Microsemi Corporation 功能描述:ATM IMA 80MBPS 2.5V 384BGA - Trays |
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