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| R ST7275-1 PRODUCT PREVIEW 8-BIT, 56-PIN MCU FOR MONITORS, WITH UP TO 60K ROM, 2K RAM, ADC, TIMER, IR, SYNC, PWM/BRM, DDC/DMA, I2C & SCI s s s s s s s s s s s s s s s s s s s s s s s s s User ROM/OTP/EPROM: up to 60 Kbytes Data RAM: up to 2 Kbytes (256 bytes stack) 8 MHz Maximum Internal Clock Frequency in fast mode, 4 MHz in normal mode Run, Wait and Halt CPU modes Sync Processor for Mode Recognition, power management and composite video blanking, clamping and free-running frequency generation. - Corrector mode - Analyzer mode Fast I2C Multi Master Interface DDC Bus Interface fully compliant with DDC1, 2B, 2B+, 2AB, 2Bi standards 32 I/O lines - 8 Open Drain I/Os with high current capacity (10 mA) on port A - 5 lines programmable as interrupt inputs 16-bit timer with 2 input captures and 2 output compare functions (with 1 output pin) 8-bit Analog to Digital Converter with 8 channels on port B 8 10-bit PWM/BRM Digital to Analog outputs One 12-bit PWM/BRM Digital to Analog output Asynchronous Serial Communications Interface Infra red controller Master Reset and Power on/off reset1 Programmable Watchdog for system reliability 56-pin Shrink Dual In line Plastic package Fully static operation 0 to + 70 oC operating temperature range 4.0V to 5.5V supply operating range 24 MHz Quartz Oscillator 63 basic instructions/17 main address modes 8x8 unsigned multiply instruction True bit manipulation Versatile Development Tools (DOS and Windows) including assembler, linker, Ccompiler, archiver, source level debugger, EPROM programmer and hardware emulator PSDIP56 See Ordering Information at the end of the Document Device Summary Features ROM (bytes) RAM (bytes) ADC Timer I2C Bus DDC/DMA Sync PWM I/O SCI IR EPROM Device OTP Device ST72751N9 60K 2K ST72751N7 48K 1.5 8 channels 1 one multimaster yes yes 9 32 yes yes ST72E751N9D1 ST72T751N9B1 ST72751N6 32K 1 Note 1: Power On/Off reset not implemented in this revision. April 1998 This is preliminary information on a new product in development or undergoing evaluation. Details are subject to change without notice. 1/3 1 ST7275-1 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST7275 is a HCMOS microcontroller unit (MCU) from the ST7 family with dedicated peripherals for Monitor applications. It is based around an industry standard 8-bit core and offers an enhanced instruction set. The processor runs with an external clock at 24 MHz with a 5V supply. Due to the fully static design of this device, operation down to DC is possible. Under software control the ST7275 can be placed in WAIT or HALT mode thus reducing power consumption. The enhanced instruction set and addressing modes afford real programming potential. In addition to standard 8-bit data management the ST7 features true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes. The device includes an on-chip oscillator, CPU, Sync Processor for video timing & Vfback analysis, up to 60K ROM, up to 2K RAM, I/O, a timer with 2 input captures and 2 output compares, an 8channel Analog to Digital Converter, DDC/DMA, I2C multi Master, SCI Serial Communications Interface, Watchdog Reset, an Infra Red Control preprocessor, and one 12-bit and eight 10-bit PWM/BRM outputs for analog DC control of external functions. Figure 1. ST7275-1 Block Diagram PORT A Up to 60K Bytes ROM/ OTP/EPROM INFRA RED PA0..6 PA7/BLANKOUT VD D A VS S A IRIN Up to 2K Bytes RAM ADC PORT B AIN 0-AIN7 PB1..7/ AIN1..7 PB0/ VFBACK/AIN0 TDO SCI (UART) ADDRESS / DATA BUSES IC SDAI RDI DDC PORT C OCMP DDC DMA TIMER WATCHDOG H/CSYNC HSYNCI2 VSYNC SCLI SCLD SDAD PC7/TDO PC6/RDI PC5/SDAI PC4/SCLI PC3/SDAD PC2/RX/SCLD PC1/HSYNCI2 PC0/OCMP/HFBACK RESET CONTROL 8-BIT CORE ALU PCL PCH SP X Y A CC SYNC PROCESSOR HFBACK VFBACK VSYNCI1 HSYNCI1 PD7/VSYNCI2/ITD PD6/CLAMPOUT PD5/ITA PD4/ITB PD3/ITC PD2/VSYNCO PD1/HSYNCO PD0/CSYNCI DA0 DA1,DA8 VSYNCO CLAMPOUT POWER ON/OFF PORT D POWER SUPPLY INTERNAL CLOCK OSC /3 or 6 PWM/BRM V DD V SS OSCIN OSCOUT CSYNCI HSYNCO VSYNCI2 VR01735Q 2/3 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without the express written approval of SGS-THOMSON Microelectronics. (c)1998 SGS-THOMSON Microelectronics - All Rights Reserved. Components by SGS-THOMSON Microelectronics conveys a license under the Philips I2C Patent. Rights to use these Purchase of components in an I2C system is granted provided that the system conforms to the I2C Standard Specification as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. I2C |
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