MT9173AE Mitel Networks Corporation, MT9173AE Datasheet - Page 12

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

MT9173/74
Notes:
Notes:
depending upon the status of bit-3.
The Diagnostics Register Reset bit (bit 2) of the
Control Register determines the reset state of the
Diagnostics Register. If, on writing to the Control
Register, this bit is set to logic “0”, the Diagnostics
Register will be reset coincident with the frame
pulse. When this bit is logic “1”, the Diagnostics
Register will not be reset.
diagnostic features, the Diagnostics Register must
be continuously written to. The output C-channel
sends status information from the Status Register to
9-148
Bit
2,3
C-Channel
XXX01111
XXX11111
0
1
4
5
6
7
Default Mode 1 can also be selected by tying CDSTi/CDi pin low when DNIC is operating in dual mode.
Default Mode 2 can also be selected by tying CDSTi/CDi pin high when DNIC is operating in dual mode.
When bits 4-7 of the Diagnostic Register are all set to one, the DNIC operates in one of the default modes as defined in Table 4a,
Do not use L
Do not use DSTo to DSTi loopback in MOD/MAS mode.
(Bit 0-7)
Reg Sel-1
bit 0
Reg Sel-1
Reg Sel-2
Loopback
PSWAP
Not Used
OUT
Name
FUN
DLO
Internal Control
to L
00000000
00010000
IN
Reg Sel-2
Register
loopback in DN/SLV mode.
bit 1
Register Select-1. Must be set to ’0’ to select the Diagnostic Register.
Register Select-2. Must be set to ’1’ to select the Diagnostic Register.
Bit 2
Force Unsync. When set to ’1’, the DNIC is forced out-of-sync to test the SYNC
recovery circuitry. When set to ’0’, the operation continues in synchronization.
Polynomial Swap. When set to ’1’, the scrambling and descrambling polynomials
are interchanged (use for MAS mode only). When set to ’0’, the polynomials retain
their normal designations.
Disable Line Out. When set to ’1’, the signal on L
’0’, L
Must be set to ’0’ for normal operation.
0
0
1
1
In order to use the
OUT
bit 2
Bit 3
Internal Diagnostic
0
1
0
1
pin functions normally.
Loopback
Table 4a. Default Mode Selection
01000000
01000000
Register
Table 5. Diagnostic Register
All loopback testing functions disabled. Normal operation.
DSTi internally looped back into DSTo for system diagnostics.
L
DSTo is internally looped back into DSTi for end-to-end testing.
OUT
bit 3
is internally looped back into L
bit 4
FUN
the system along with the received HK bit as shown
in Table 6.
In MOD mode, the CD port is no longer an ST-BUS
but is a serial bit stream operating at the bit rate
selected. It continues to transfer the C-channel but
the D-channel and the HK bit no longer exist. DUAL
port operation must be used in MOD mode. The C-
channel is clocked in and out of the CD port by TCK
and CLD with TCK defining the bits and CLD the
Default Mode-1 : Bit rate is 80 kbit/s. ATTACK,
PSEN, DINB, DRR and all diagnostics are disabled.
TxHK=0.
Default Mode-2 Bit rate is 160 kbit/s. ATTACK,
PSEN, DINB, DRR and all diagnostics are disabled.
TxHK=0.
Description
Default Mode Selection
PSWAP
(Refer to Table 4a)
bit 5
OUT
Description
IN
Preliminary Information
is set set to V
for system diagnostics.
bit 6
DLO
Not Used
bit 7
Bias
. When set to