MT9172AN datasheet(10/22 Pages) MITEL

Part #	MT9172AN

Description	ISO2-CMOS ST-BUS??FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit

Download	22 Pages

Scroll/Zoom	100%

Manufacturer	MITEL [Mitel Networks Corporation]

Direct Link	http://www.mitel.com

Logo

10 / 22 page

MT9171/72

Advance Information

9-142

transfer the D-channel in channel 0 and the C-

channel in channel 16 or vice versa. One other

feature exists; ODE, where both the DV and CD

ports are tristated in order that no devices are

damaged due to excessive loading while all DNICs

are in a random state on power up in a daisy chain

arrangement.

DV Port (DSTi/Di, DSTo/Do)

The DV port transfers data or PCM encoded voice to

and from the line according to the particular mode

selected by the mode select pins. The modes

affecting the configuration of the DV port are MOD or

DN and DUAL or SINGL. In DN mode the DV port

operates as an ST-BUS at 2.048 Mbit/s with 32, 8 bit

channels per frame as shown in Figure 9. In this

mode the DV port channel configuration depends

upon whether DUAL or SINGL port is selected.

When DUAL port mode is used, the C and D

channels are passed through the CD port and the B1

and B2 channels are passed through the DV port. At

80 kbit/s only one channel of the available 32 at the

DV port is utilized, this being channel 0 which carries

the B1-channel. This is shown in Figure 3. At 160

kbit/s, two channels are used, these being 0 and 16

carrying the B1 and B2 channels, respectively. This

is shown in Figure 4. When SINGL port mode is

used, channels B1, B2, C and D are all passed via

the DV port and the CD port is disabled. See CD port

description for an explanation of the C and D

channels.

The D-channel is always passed during channel time

0 followed by the C and B1 channels in channel

times 1 and 2, respectively for 80 kbit/s. See Figure

5. For 160 kbit/s the B2 channel is added and

occupies channel time 3 of the DV port. See Figure

6. For all of the various configurations the bit orders

are shown by the respective diagram. In MOD mode

the DV and CD ports no longer operate at 2.048

Mbits/s

but

are

continuous

serial

bit

streams

operating at the bit rate selected of 80 or 160 kbit/s.

While in the MOD mode only DUAL port operation

can be used.

In order for more than one DNIC to be connected to

any one DV and CD port, making more efficient use

of the busses, the DSTo and CDSTo outputs are put

into high impedance during the inactive channel

times of the DNIC. This allows additional DNICs to

be cascaded onto the same DV and CD ports. When

used in this way a signal called F0o is used as an

indication to the next DNIC in a daisy chain that its

channel time is now active. Only the first DNIC in the

chain receives

the system frame pulse

and

all

others

receive

the

F0o

from its predecessor in

the chain.

This allows up to 16 DNICs to be

cascaded.

CD Port (CDSTi/CDi, CDSTo/CDo)

The CD port is a serial bidirectional port used only in

DUAL port mode. It is a means by which the DNIC

receives its control information for things such as

setting the bit rate, enabling internal loopback tests,

sending status information back to the system and

transferring low speed signalling data to and from

the line.

The CD port is composed of the C and D-Channels.

The C-channel is used for transferring control and

status information

between the DNIC and the

system. The D-channel is used for sending and

receiving signalling information and lower speed

data between the line and the system. In DN/DUAL

mode the DNIC receives a C-channel on CDSTi

while transmitting a C-channel on CDSTo.

Fifteen

channel times later (halfway through the frame) a D-

channel is received on CDSTi while a D-channel is

transmitted on CDSTo. This is shown in Figure 7.

The order of the C and D bytes in DUAL port mode

can be reversed by the mode select pins. See Table

1 for a listing of the byte orientations.

The D-channel exists only in DN mode and may be

used for transferring low speed data or signalling

Figure 9 - ST-BUS Format

Channel

0

Channel

1

Channel

2

• • • • • • • •

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

125

µsec

Channel

31

Channel

30

Channel

31

Channel

0

Channel

29

F0

ST-BUS

Most

Significant

Bit (First)

Least

Significant

Bit (Last)

3.9

µsec

Similar Part No. - MT9172AN

Manufacturer	Part #	Datasheet	Description
Zarlink Semiconductor I...	MT9172AN	401Kb / 25P	ISO2-CMOS ST-BUS FAMILY
	MT9172AN	553Kb / 28P	Digital Subscriber Interface Circuit Digital Network Interface Circuit
	MT9172AN1	553Kb / 28P	Digital Subscriber Interface Circuit Digital Network Interface Circuit
	MT9172ANR	553Kb / 28P	Digital Subscriber Interface Circuit Digital Network Interface Circuit
	MT9172ANR1	553Kb / 28P	Digital Subscriber Interface Circuit Digital Network Interface Circuit

More results

Similar Description - MT9172AN

Manufacturer	Part #	Datasheet	Description
Mitel Networks Corporat...	MT8971B	390Kb / 20P	ISO2-CMOS ST-BUS??FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit
	MT8910-1	419Kb / 26P	CMOS ST-BUS??FAMILY Digital Subscriber Line Interface Circuit
	MT8930C-1	323Kb / 42P	CMOS ST-BUS??FAMILY Subscriber Network Interface Circuit
Zarlink Semiconductor I...	MT9171	553Kb / 28P	Digital Subscriber Interface Circuit Digital Network Interface Circuit
Mitel Networks Corporat...	MT9174	33Kb / 4P	ISO2-CMOS ST-BUS??FAMILY Digital Network Interface Circuit with Receive Sync Marker Bit
	MT8930C	683Kb / 36P	CMOS ST-BUS??FAMILY Subscriber Network Interface Circuit Preliminary Information
	MT8931C	309Kb / 40P	CMOS ST-BUS??FAMILY Subscriber Network Interface Circuit Preliminary Information
Zarlink Semiconductor I...	MT9173	613Kb / 28P	Digital Subscriber Interface Circuit with RxSB Digital Network Interface Circuit with RxSB
Zarlink Semiconductor I...	MT8930C	2Mb / 41P	Subscriber Network Interface Circuit
Mitel Networks Corporat...	MT8931B	37Kb / 3P	Subscriber Network Interface Circuit

More results

MT9172AN Datasheet(PDF) 10 Page - Mitel Networks Corporation

MT9172AN Datasheet(HTML) 10 Page - Mitel Networks Corporation

Similar Part No. - MT9172AN

Similar Description - MT9172AN

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Datasheet Download

Link URL