BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 22

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

1.0 Pin Descriptions
1.1 Pin Assignments
Table 1-1. Hardware Signal Definitions (3 of 8)
1-6
TPOSI
TNEGI
TPOSO
TNEGO
TDLI
TDLCKO
TCKO
TNRZO
MSYNCO
Pin Label
TX Positive Rail Input
TX Negative Rail Input
TX Positive Rail
Output
TX Negative Rail
Output
TX Data Link Input
TX Data Link Clock
TX Clock Output
TX Non Return to
Zero Data
TX Multiframe Sync
Signal Name
Digital Transmitter (XMTR) (Continued)
I
I
O
O
I
O
O
O
O
I/O
Selected time slot bits are sampled on TDLCKO falling edge for insertion
Gapped version of TCKI for external data link applications. TDLCKO high
Line rate data input on TCKI falling edge. Replaces all data that would
otherwise be supplied by ZCS encoder. Bt8370/8375/8376 default power
on state selects TPOSI/TNEGI as source for all transmitted XTIP/XRING
output pulses, encoded as follows:
Line rate data input on TCKI falling edge. Replaces all data that would
otherwise be supplied by ZCS encoder. Refer to TPOSI signal definition.
Line rate data output from ZCS encoder or JAT on rising edge of TCKO.
Active-high marks transmission of a positive AMI pulse. Used to monitor
transmit data or for systems that employ an external line interface unit.
Line-rate data output from ZCS encoder or JAT on rising edge of TCKO.
Active-high marks transmission of a negative AMI pulse. Used to monitor
transmit data or for systems that use an external line interface unit.
into the transmit output stream during external data link applications.
clock pulse coincides with low TCKI pulse interval during selected time
slot bits (see [DL3_TS; addr 015]).
Line rate clock used to align XTIP/XRING outputs. If transmit jitter
attenuator (TJAT) is disabled, TCKO equals selected TCKI or ACKI. If TJAT
is enabled, TCKO equals the jitter attenuated clock (JCLK).
Line rate data output from transmitter on rising edge of TCKI. TNRZO does
not include ZCS encoded bipolar violations.
Active-high for 1 TCKI clock cycle to mark the first bit of TX multiframe
coincident with TNRZO. Output on rising edge of TCKI.
Conexant
NOTE(S):
data from internal transmitter.
TPOSI
0
0
1
1
Software must set TDL_IO (addr 018) to enable normal
Fully Integrated T1/E1 Framer and Line Interface
TNEGI
0
1
0
1
Definition
No pulse
Negative AMI pulse
Positive AMI pulse
Invalid
TX Pulse Polarity
Bt8370/8375/8376
N8370DSE