DS21354/DS21554 DS2154 DS21354/ DS21554 DS21354 DS21Q354 DS21Q554 AN361 APP361 - Datasheet Archive

 

Keywords: E1, single chip transceivers, SCTs, line interface unit, LIU, framer, HDLC, JTAG, PCM, interleaved, IBO Aug 10, 2001

 

Maxim > App Notes > T/E Carrier and Packetized Keywords: E1, single chip transceivers, SCTs, line interface unit, LIU, framer, HDLC, JTAG, PCM, interleaved, IBO Aug 10, 2001 APPLICATION NOTE 361 DS21354/DS21554 DS21354/DS21554 vs. DS2154 DS2154 Single Chip Transceivers Abstract: This application note provides a list of the differences between Maxim Communications Products DS21354/DS21554 DS21354/DS21554 and DS2154 DS2154 single chip transceivers (SCTs). The additional features contained in the DS21354/DS21554 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 DS21354/DS21554 and the DS2154 DS2154. The DS21354/ DS21354/ DS21554 DS21554 is a superset of the DS2154 DS2154 maintaining a consistent pin out and register set. All of the original features of the DS2154 DS2154 have been retained and software created for the DS2154 DS2154 is transferable to the DS21354/ DS21354/ DS21554 DS21554 with minimal effort. The DS21354 DS21354 and DS21554 DS21554 are functionally equivalent with the only difference being the required supply voltage-the DS21354 DS21354 operates at 3.3V and the DS21554 DS21554 operates at 5V. 2. Additional Functionality New Features Data Sheet Section HDLC controller 15 JTAG 17 8 Mbps interleaved PCM bus operation 18 3.3V operation with 5V tolerant I/O (for DS21354 DS21354) 17 3. Changes in Register Definitions When implementing the new features of the DS21354/DS21554 DS21354/DS21554, a priority was placed on preserving the DS2154 DS2154's register map to facilitate code migration from existing DS2154 DS2154 designs. This section highlights register additions and differences found in the DS21354/DS21554 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. 3.1.1 Common Control Register Register Address CCR6 1Dh Description Common Control Register 6 Page 1 of 3 3.2 HDLC Controller (section 15) Register Address Description HCR B0h HDLC Control Register HSR B1h HDLC Status Register HIMR B2h HDLC Interrupt Mask Register RHIR B3h Receive HDLC Information Register RHFR B4h Receive HDLC FIFO Register THIR B6h Transmit HDLC Information Register THFR B7h Transmit HDLC FIFO Register RDC1 B8h Receive HDLC DS0 Control Register 1 RDC2 B9h Receive HDLC DS0 Control Register 2 TDC1 BAh Transmit HDLC DS0 Control Register 1 TDC2 BBh Transmit HDLC DS0 Control Register 2 3.1.2 Interleaved PCM Bus Operation (section 18) Register Address Description IBO B5h Interleave Bus Operation 3.2 Bit Assignment Changes within Existing Registers Highlights bit locations in the DS21354/DS21554 DS21354/DS21554 which have changed from the DS2154 DS2154. DS21354/DS21554 DS21354/DS21554 DS21354/DS21554 DS21354/DS21554 Register Bit # DS2154 DS2154 Symbol DS2154 DS2154 Description Symbol Description CCR3 4 N/A Not assigned ESR Elastic Store Reset CCR5 6 N/A Not assigned RESALGN Receive Elastic Store Align CCR5 5 N/A Not assigned TESALGN Transmit Elastic Store Align 4. Changes in Device Pin Out 4.1 Package types The DS2154 DS2154 and DS21354/DS21554 DS21354/DS21554 are both offered in a 100 pin 14 x 14 x 1.4 mm LQFP. Values listed are for body dimensions. 4.2 Device Pin Differences 4.2.1 JTAG Pins Pin # DS21354/DS21554 DS21354/DS21554 DS2154 DS2154 Description 2 JTMS NC IEEE 1149.1 Test Mode Select 4 JTCLK NC IEEE 1149.1 Test Clock Signal 5 JTRST NC IEEE 1149.1 Test Reset 7 JTDI NC IEEE 1149.1 Test Data Input 10 JTDO NC IEEE 1149.1 Test Data Output Page 2 of 3 4.2.2 Interleaved PCM Bus Pins Pin # DS21354/DS21554 DS21354/DS21554 DS2154 DS2154 Description 36 CI NC Carry In 54 CO NC Carry Out 4.2.3 Framer Mode Select Pin Pin # DS21354/DS21554 DS21354/DS21554 DS2154 DS2154 Description 76 NC Framer Mode Select FMS Related Parts DS21354 DS21354: QuickView - Full (PDF) Data Sheet - Free Samples DS2154 DS2154: QuickView - Full (PDF) Data Sheet - Free Samples DS21554 DS21554: QuickView - Full (PDF) Data Sheet - Free Samples DS21Q354 DS21Q354: QuickView - Full (PDF) Data Sheet - Free Samples DS21Q554 DS21Q554: QuickView - Full (PDF) Data Sheet - Free Samples Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-MailTM. Application note 361: www.maxim-ic.com/an361 More Information For technical support: www.maxim-ic.com/support For samples: www.maxim-ic.com/samples Other questions and comments: www.maxim-ic.com/contact AN361 AN361, AN 361, APP361 APP361, Appnote361, Appnote 361 Copyright © by Maxim Integrated Products Additional legal notices: www.maxim-ic.com/legal Page 3 of 3