Keywords: E1, single chip transceivers, SCTs, line interface unit, LIU, framer, HDLC, JTAG, PCM, interleaved, IBO Related Parts
APPLICATION NOTE 361
DS21354/DS21554 vs. DS2154 Single Chip Transceivers
Aug 10, 2001
Abstract: This application note provides a list of the differences between Maxim Communications Products DS21354/DS21554 and DS2154 single chip transceivers (SCTs). The additional features contained in the DS21354/DS21554 are highlighted along with the additional registers required for support of the new features, HDLC controller, interleaved bus operation (IBO), and JTAG.
1. Introduction
This application note highlights the differences between the DS21354/DS21554 and the DS2154. The DS21354/DS21554 is a superset of the DS2154 maintaining a consistent pin out and register set. All of the original features of the DS2154 have been retained and software created for the DS2154 is transferable to the DS21354/DS21554 with minimal effort. The DS21354 and DS21554 are functionally equivalent with the only difference being the required supply voltage—the DS21354 operates at 3.3V and the DS21554 operates at 5V.
When implementing the new features of the DS21354/DS21554, a priority was placed on preserving the DS2154's register map to facilitate code migration from existing DS2154 designs. This section highlights register additions and differences found in the DS21354/DS21554.
3.1 New Feature Register Usage
Highlights new registers related to new features. Each item can be found in the data sheet under the listed sections.
