MTC-20172-PC AMI Semiconductor, Inc., MTC-20172-PC Datasheet - Page 2

• Manufacturer Part Number: MTC-20172-PC
• Description: S Interface Circuit for ISDN (SIC)
• Manufacturer: AMI Semiconductor, Inc.

6.5.8 Command and Indications for NT Applications.
6.5.8.1 Commands (Downstream) in NT Mode
Table 6.4.a : MTC-20172 SIC C/I : NT overview
Table 6.4.b : MTC-20172 SIC commands (DS) NT
* Marks functional difference;
& Marks differences that are merged.
# Unconditional commands, which
Page 56, Table 6.4.b, shows incorrect command codes for the Ald and AIL states.
NT
0000
0001
0010
0011
0100
0101
0110
0111
0000
0001
0010
0011
0100
1000
1010
1100
1110
1111
force an unambiguous state.
Downstr
Command
DR
-& * RES
ssz=TM1
-& * TM2
RSYd
-
-
-
DR #
*RES #
&
RSYd
ARd
AId
AIL
did=
DC
ssz #
= TM1
*TM2 #
ARL
&
The correct table is given here.
Indicat.
TIM
(lsl)*&-
Upstr.
-
-
RSYu
- ++
ei * &-
-
ERRATA
Deactivate
Request
RESET
TEST-MODE 1
TEST-MODE 2
Resynchon-
izing down
Activation
Request down
Activat. req
with S-loop
Activation
Indication
Activ. Indic.
with S-loop
Deactivate
Confirmation
Remark 1: When the U-interface is
resynchronizing, the basic mode sends
Continuous Zeros, the extended mode
sends INFO2. MTC-20172 SIC will
send INFO2.
1000
1001
1010
1001
1100
1101
1110
1111
Downstr
Command
ARd
-
ARL
-
AId
-
AIL
did=DC
Forces MTC-20172 SIC to deactiv. the S-bus (=INFO0)
followed by DIu and did=DC
Forces MTC-20172 SIC to soft reset, extended mode only,
MTC-20172 SIC accepts it in basic mode (merged)
Forces MTC-20172 SIC to test-mode 1, sending
single zeros
Forces MTC-20172 SIC to test-mode 2, extended mode
only, sending continuous zeros, command is
extended to the basic mode of the MTC-20172 SIC
The U-interface is not synchronous, MTC-20172 SIC
sends INFO2 {or SCZ}, see remark 1 below
MTC-20172 SIC forced to INFO2 transmission,
receiver indicates the S-bus reaction
INFO2 transmission on the S-bus
test loop2 switched (transparent loop)
INFO4 transmission, normally only after
AIu indication is received
INFO4 transmission
test loop2 switched (transparent loop)
Deactivation confirmation, entering the
power down state, INFO0 sent, critical
timing to halt the clocks, see 6.2.4
Upstr.
Indicat
ARu
-
-
-
AIu
-
-
DIu
MTC-20172
++ MAIC is NOT implemented.
Remark 2: During loops, the MTC-
20172 SIC simply ignores the incoming
INFO3 from the S-bus. The receiver
synchronizes on looped INFO2/4.
Data Sheet & Reference Manual
Rev. 1.1 February 1997
* Marks functional differences
& Marks functional differences which
(4 in total).
are merged for both devices.