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1.0 Product Description
1.1 Overview
The CX2839x devices each contain multiple T1/E1 framers which provide the
data access and framing portion of T1 and E1 physical layer interfaces:
Device
Number of Framers
CX28394
CX28398
CX28395
4
8
16
While the framers are identical, there are minor differences among the devices
due to the pins provided. These differences are summarized below.
1.1.1 External Datalink
The CX28394 and CX28398 devices include an External Datalink (DL3) which
provides signal access to any bit(s) in any time slot of all frames, odd frames, or
even frames, including T1 framing bits. Refer to Section 2.2.8, External Receive
Data Link (CX28394 and CX28398 Only), and 2.4.1, External Transmit Data
Link (CX28394 and CX28398 Only). The DL3 signals are not available on the
CX28395 device.
1.1.2 RINDO/TINDO
Receive and Transmit Time Slot Indicator signals are provided by each framer to
mark selected (programmable) receive and transmit system bus time slots. On the
CX28394 and CX28398 devices, these signals appear on different pins depending
on whether Multiplexed System Bus mode or Non-Multiplexed System Bus mode
is selected. On the CX28395, they are available only in Multiplexed Bus mode.
100054E
Conexant
1-1
CONEXANT [ CONEXANT SYSTEMS, INC ]
