Description
www.DataSheet4U.com APPLICATION NOTE SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor AN10281_1 Philips Semiconductors TP97035.3/W97 TRAD www.DataSheet4U.com Philips Semiconductors SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor Application Note AN10281 1 Abstract This application note describes the functioning of the Philips autosync SAA4848PS/SAA4849PS deflection controller plus microcontroller. This application note also includes a pin-by-pin description of the device. Furthermore you will find some layout and application proposals and also a functional comparison with the successful analog TDA4856. Purchase of Philips I2C components conveys a license under the I2C patent to use the components in the I2C system, provided the system conforms to the I2C specifications defined by Philips. © KONINKLIJKE PHILIPS ELECTRONICS N.V. 2004 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. 2 www.DataSheet4U.com Philips Semiconductors SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor Application Note AN10281 1 APPLICATION NOTE SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor AN10281_1 Author(s): Frank van Rens, Vedran Kovacevic Philips Semiconductors Competence Center Display Solutions Eindhoven, The Netherlands Keywords autosync monitor geometry control CRT monitor I2C-bus control Deflection controller & Microcontroller Number of pages: 88 Date: 2004-01-08 3 www.DataSheet4U.com Philips Semiconductors SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor Application Note AN10281 1 Summary In this application note the autosync CMOS deflection controller SAA4848PS/SAA4849PS is described. The SAA4848/49 is intended for 17” to 19” CRT monitors. It provides a cost effective solution with integrated microcontroller. The SAA4848/49 covers all the TDA4856 functionality except horizontal focus. Some new geometry corrections are added: • Horizontal s-wave • Top and bottom corner balance • Top bending • Rotation balance • Four 8-bit low interference DACs Some additional features are added: • Integrated soft start mechanism of the B+ voltage controller during startup and during mode changing ensuring safe operation of the various deflections transistors and diodes. • Integrated I2C -bus controller B+ voltage adjustment • Under voltage detection • I2C -bus controlled setting for separate horizontal EHT compensation and vertical EHT compensation for combined deflection/EHT monitors. The microcontroller features are: • Standard 80c51 CPU core, 6-clock instruction cycle running at fixed 12MHz • DDC2B, DDC2Bi, DDC2B+, DDC2AB protocol support • 1x 8-bit PWM • Three input 8-bit ADC • 10mA sink port for LED application • Power saving mode • RAM 1024 byte • SAA4848 embedded ROM 48k byte • SAA4849 stacked FLASH 28k byte (in-system programming or parallel programming) 4 www.DataSheet4U.com Philips Semiconductors SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor Application Note AN10281 1 CONTENTS 1 1.1 1.2 1.3 1.4 1.5 1.6 INTRODUCTION ...................................................................................................................9 Block diagram deflection controller .........................................................................................................................10 Block diagram microcontroller..................................................................................................................................10 On-chip interconnect of deflection controller and microcontroller ...................................................................11 Pin multiplexer block diagram...................................................................................................................................12 SAA4848/49 – TDA4856 comparison....................................................................................................................13 Geometry controls ......................................................................................................................................................14 2 2.1 2.2 2.3 FUNCTION DESCRIPTION AND APPLICATION .......................................................... 17 Deflection controller...................................................................................................................................................17 Microcontroller ............................................................................................................................................................19 Component placing and ground map.......................................................................................................................25 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 PIN APPLICATION...............................................................................................................26 Pin 1: P1.0.....................................................................................................................................................................26 Pin 2: P1.3/ I2C -SCL .................................................................................................................................................26 Pin 3: P1.4/ I2C -SDA ................................................................................................................................................26 Pin 4: P1.2/nINT0 ......................................................................................................................................................27 Pin 5: P2.6/DAC4/HSOUT .....................................................................................................................................28 Pin 6: P2.3/DAC3.......................................................................................................................................................29 Pin 7: HUNLOCK......................................................................................................................................................30 Pin 8: CLBL/VSOUT ................................................................................................................................................32 Pin 9: P0.3.....................................................................................................................................................................33 Pin 10: P0.2.......................................................................................................................................................33 Pin 11: P0.1.......................................................................................................................................................33 Pin 12: P0.0.......................................................................................................................................................34 Pin 13: P0.7.......................................................................................................................................................34 Pin 14: VSSE ....................................................................................................................................................34 Pin 15: VDDD .................................................................................................................................................35 Pin 16: V5V ......................................................................................................................................................35 Pin 17: VSSD – the star point ground..........................................................................................................35 Pin 18: BDRV ..................................................................................................................................................36 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 5 www.DataSheet4U.com Philips Semiconductors SAA4848/SAA4849 digital deflection controller plus microcontroller for CRT monitor Application Note AN10281 1 3.19 3.20 3.21 3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39 3.40 3.41 3.42 3.43 3.44 3.45 3.46 3.47 3.48 3.49 3.50 3.51 3.52 Pin 19: HBGND..............................................................................................................................................36 Pin 20: HDRV..................................................................................................................................................37 Pin 21: HFB......................................................................................................................................................38 Pin 22: XRAY...................................................................................................................................................39 Pin 23: RST.......................................................................................................................................................39 Pin 24: VFOCUS .............................................................................................................................................40 Pin 25: P0.4.............................................................................................................................

Part Number
SAA4849

Free Sample / Buy Component / Product Information
Locate Part SAA4849

Datasheet
Locate DataSheet

SAA4849 Cross Reference : Jump New Window
Get Cross-Reference Datasheet