CN8380EPF CONEXANT [Conexant Systems, Inc], CN8380EPF Datasheet - Page 65

• Manufacturer Part Number: CN8380EPF
• Description: integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications
• Manufacturer: CONEXANT [Conexant Systems, Inc]

CN8380
Quad T1/E1 Line Interface
PULSE[2:0]
AISCLK
AUTO_AIS
TAIS
N8380DSA
4/21/99
13, 23, 33, 43—LIU Control (LIU_CTL)
AISCLK
7
AUTO_AIS
Transmit Pulse Template Select
shaped to meet the transmit pulse template according to the selected cable length and type.
Custom shape programming for alternative cable types or pulse templates can be set using the
SHAPE0–SHAPE7 registers [addr n8 – nF].
Enable Automatic ACKI Switching
automatically switched to reference TACKI (T1) or EACKI (E1) instead of TCLK when
transmitting AIS (all 1s) data. Set AISCLK only if the system supplies an alternate line rate
clock on the TACKI or EACKI pins. Also refer to description of AUTO_AIS/TAIS below.
Automatic Transmit Alarm Indication Signal
Manual Transmit Alarm Indication Signal
(AUTO_AIS), the AIS generator replaces all data output on XTIP/XRING with an unframed
all-1s signal (AIS). This includes replacing data supplied from TPOSI/TNEGI and from the
receiver during Remote Line Loopback. Automatic mode sends AIS for the duration of
transmit loss of clock [TLOC; addr n5]. If AISCLK is enabled, the transmit clock is switched
to use TACKI or EACKI to transmit AIS.
0 = TACKI/EACKI is not used to transmit AIS
1 = TACKI/EACKI is used to transmit AIS
6
PULSE
000
001
010
011
100
101
110
111
TAIS
5
Cable Length
0–133 ft.
133–266 ft.
266–399 ft.
399–533 ft.
533–655 ft.
ITU–T G.703
ITU–T G.703
I.431 ISDN
Advance Information
LLOOP
4
—
Conexant
Each positive or negative pulse output on XTIP/XRING is
—
If AISCLK is active, the transmitter clock is
—
RLOOP
Cable Type
100
100
100
100
100
75
120
100
When activated manually (TAIS) or automatically
3
Coaxial Cable
Twisted Pair
Twisted Pair
Twisted Pair
Twisted Pair
Twisted Pair
Twisted Pair
Twisted Pair
TAIS_PE
2
LLOOP_PE
Application
T1 DSX
T1 DSX
T1 DSX
T1 DSX
T1 DSX
E1
E1
T1 CSU/NCTE
3.3 Per Channel Registers
1
3.0 Registers
RLOOP_PE
0
3-13
R/W