cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 52

• Manufacturer Part Number: cx28394
• Description: Quad/x16/octal-t1/e1/j1 Framers
• Manufacturer: Conexant Systems, Inc.

1.0 Product Description
1.2 Pin Assignments
Table 1-6. Hardware Signal Definitions (4 of 9)
1-34
TCKO[4:1]
TCKO[8:1]
TCKO[16:1]
TNRZO[4:1]
TNRZO[8:1]
TNRZO[16:1]
MSYNCO[4:1]
MSYNCO[8:1]
MSYNCO[16:1]
RCKI[4:1]
RCKI[8:1]
RCKI[16:1]
RNRZI[4:1]
RNRZI[8:1]
RNRZI[16:1]
RPOSI[4:1]
RPOSI[8:1]
RNEGI[4:1]
RNEGI[8:1]
RDLO[4:1]
RDLO[8:1]
RDLCKO[4:1]
RDLCKO[8:1]
Pin Label
TX Clock Output
TX Non Return
to Zero Data
TX Multiframe
Sync
RX Clock Input
RX Positive Rail
Input
RX Positive Rail
Input
RX Negative Rail
Input
RX Data Link
Output
RX Data Link
Clock Output
Signal Name
Device
Transmitter (XMTR) (Continued)
4
8
5
4
8
5
4
8
5
4
8
5
4
8
5
4
8
4
8
4
8
4
8
(1)
Receiver (RCVR)
Conexant
I/O
O
O
O
O
O
I
I
I
I
Line rate clock. TCKO equals selected TCKI or T1ACKI
(E1ACKI).
Line-rate data output from transmitter on rising edge of
TCKO. TNRZO does not include ZCS encoded bipolar
violations.
Active high for one TCKI clock cycle to mark the first bit
of TX multiframe coincident with TNRZO. Output on
rising edge of TCKO.
Line rate clock samples RPOSI and RNEGI or RNRZ.
Line rate data input on rising edge of RCKI. Non-return
to zero (NRZ) receive data.
Line rate data input on rising edge of RCKI. RPOSI and
RNEGI levels are interpreted as received AMI pulses,
encoded as follows:
Unipolar. Non-return to zero (NRZ) data may be
connected to RPOSI or RNEGI in which case the other
input should be connected to ground. In this
configuration RAMI [RCR0; addr 040] should be set to 1
(receive AMI line format) and DIS_LCV
[RALM; addr 045] should be set to 1 (disable LCV
counting and reporting).
Line rate data input on rising edge of RCKI. See RPOSI
signal definition.
Line rate NRZ data output from receiver on falling edge
of RCKI. All receive data is represented at the RDLO pin.
However, selective RDLO bit positions are also marked
by RDLCKO for external data link applications.
Gapped version of RCKI for external data link
applications. RDLCKO high clock pulse coincides with
low RCKO pulse interval during selected time slot bits,
otherwise RDLCKO is low (see
External Data Link
RPOSI
0
0
1
1
RNEGI
0
1
0
1
Quad/x16/Octal—T1/E1/J1 Framers
Waveforms).
Definition
Invalid (decoded as a pulse)
CX28394/28395/28398
Negative AMI pulse
Positive AMI pulse
RX Pulse Polarity
Figure 2-4, Receive
No pulse
100054E