MT9173AE Mitel Networks Corporation, MT9173AE Datasheet - Page 9

• Manufacturer Part Number: MT9173AE
• Description: Digital Subscriber Interface Circuit with RxSB
• Manufacturer: Mitel Networks Corporation

Preliminary Information
select the DNIC to operate as a MASTER or SLAVE,
in DUAL or SINGLE port operation, in MODEM or
DIGITAL NETWORK mode and the order of the C
and D channels on the CD port. Table 2 provides a
description of each mode and Table 3 gives a pin
configuration according to the mode selected for all
pins that have variable functions. These functions
vary depending on whether it is in MAS or SLV, and
whether DN or MOD mode is used.
The overall mode of operation of the DNIC can be
programmed to be either a baseband modem
(MOD mode) or a digital network transceiver (DN
mode).
SINGL
Mode
DUAL
Mode
MAS
MOD
ODE
SLV
D-C
C-D
DN
#
0
1
2
3
4
5
6
7
As a baseband modem, transmit/receive
SLAVE
crystal is phase locked to it to provide clocks for the entire device and are output for the external
system to synchronize to.
MASTER
which must be frequency locked. The transmit data is synchronized to the system timing with the
receive data recovered by a clock extracted from the receive data and resynchronized to the system
timing.
DUAL PORT
and the DV port transferring the B1& B2 channels.
SINGLE PORT - The B1& B2, C and D channels are all transferred through the DV port. The CD
port is disabled and CDSTi should be pulled high.
MODEM
through the DV port at the baud rate selected. The C-channel is transferred through the CD port
also at the baud rate and is synchronized to the CLD output.
DIGITAL NETWORK
2.048 Mbits/s and the line at 80 or 160 kbits/s configured according to the applicable ISDN
recommendation.
D BEFORE C-CHANNEL
C BEFORE D-CHANNEL
OUTPUT DATA ENABLE
impedance state. This is intended for power-up reset to avoid bus contention and possible damage
to the device during the initial random state in a daisy chain configuration of DNICs. In all the other
modes of operation DV and CD ports are enabled during the appropriate channel times.
Name
CLD
CLD
F0
F0
F0
F0
F0
F0
-
-
The chip timebase is extracted from the received line data and the external 10.24 MHz
-
Baseband operation at 80 or 160 kbits/s. The line data is received and transmitted
F0/CLD
The timebase is derived from the externally supplied data clocks and 10.24 MHz clock
-
Both the CD and DV ports are active with the CD port transferring the C&D channels
Input/Output
Output
Output
Output
Output
-
Input
Input
Input
Input
Intended for use in the digital network with the DV and CD ports operating at
-
-
-
When mode 7 is selected, the DV and CD ports are put in high
The D-channel is transferred before the C-channel following F0.
The C-channel is transferred before the D-channel following F0.
Table 3. Pin Configurations
Table 2. Mode Definitions
Name
RCK
RCK
F0o
F0o
F0o
F0o
F0o
F0o
Function
F0o/RCK
data is passed transparently through the device at 80
or 160 kbit/s by the DV port. The CD port transfers
the C-channel and D-Channel also at
kbit/s.
In DN mode, both the DV and CD ports operate as
ST-BUS streams at 2.048 Mbit/s.
transfers data over pins DSTi and DSTo while on the
CD port, the CDSTi and CDSTo pins are used. The
SINGL port option only exists in DN mode.
In MOD mode, DUAL port operation must be used
and the D, B1 and B2 channel designations no
longer exist. The selection of SLV or MAS will
Input/Output
Output
Output
Output
Output
Output
Output
Output
Output
Name
TCK
TCK
C4
C4
C4
C4
C4
C4
C4/TCK
MT9173/74
Input/Output
The DV port
Output
Output
Output
Output
Input
Input
Input
Input
80 or 160
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