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ST7285C Datenblatt(PDF) 2 Page - STMicroelectronics

Teilenummer ST7285C
Bauteilbeschribung  8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
PDF  117 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7285C Datenblatt(HTML) 2 Page - STMicroelectronics

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Table of Contents
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ST7285C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1 GENERAL DESCRIPTION . . . . . . . .... .. .... ... ... ... ... .. .... ... .... ... . . ... ....5
1.1 INTRODUCTION ..... . . . . . ... ..... . . .. .... ... ... ... ... .... .. .. .... .. .....5
1.2 PIN DESCRIPTION .... . ..... ... . . . . . ... . . . ... . . . .... ... .. .. . . ..... . . ... ..6
1.3 MEMORY MAP . . . . . . ... . ..... .... .. ... ... . . . ... .... ... ... . . ... .. . .... . .10
2 CENTRAL PROCESSING UNIT ..... . ... .... .. .. . . . ... .. .. .. . . .. .... .... .. . . ....13
2.1 INTRODUCTION ..... . . . . . ... ..... . . .. .... ... ... ... ... .... .. .. .... .. ....13
2.2 CPU REGISTERS . . . . . . . . .... . ..... . ..... ... ... .. ... . . . ... .... .. .. . .... .13
3 CLOCKS, RESET, INTERRUPTS & POWER SAVING MODES .... . . . . .. ... ..... . . .. ..15
3.1 CLOCK SYSTEM .. ..... ... .. . . ..... .... .. .. .. . . ... .... . ..... .. .. . . .. ... .15
3.1.1 General Description ..... . ... .... .. .. . . . ... .. .. .. . . .. .... .... .. . . ....15
3.1.2 Crystal Resonator . . . . . . . . .... .. ... ..... ... .. . . . ... . . . ... ... .... ... .15
3.1.3 Ceramic Resonator . . . .... .... .. .. .. . . . . . .... ... ... .. .... ... ... ... . . 16
3.1.4 External Clock . . . . . . . .... .. .... ... ... ... ... .. .... ... .... ... . . ... ...16
3.2 MISCELLANEOUS REGISTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . ..... ... .. 17
3.3 RESETS . . . . . .. . ..... .. ..... . . . . . . . . . ..... .... . . . . . ... ... ... .. .. . . . . . . .18
3.3.1 Introduction . . . . . . . . .... . ..... . ..... ... ... .. ... . . . ... .... .. .. . .... .18
3.3.2 External Reset . . . . . . . . . . ..... . . .. .... .. .. . . . . . . . . .... . . .. ..... . ....18
3.3.3 Reset Operation . . . . . . . . . . . . . . . .... ... ... ... . ... . . . ..... .. .... ... . . .18
3.3.4 Power-on Reset . . . . . . . . . . . . . . . .... ... ... ... . ... . . . ..... .. .... ... . . .18
3.4 WATCHDOG TIMER SYSTEM (WDG) . . .... . . ... ... .... . . . . ..... ... . . . . . ... . 19
3.4.1 Introduction . . . . . . . . .... . ..... . ..... ... ... .. ... . . . ... .... .. .. . .... .19
3.4.2 Functional Description . . . .... . . .... . . . . ...... . . .. ..... ... . ..... .. .. .. 19
3.4.3 Watchdog Register . . . .... .... .. .. .. . . . . . .... ... ... .. .... ... ... ... . . 19
3.5 INTERRUPTS . . . . .... .. .... .. ..... . . . ..... . ..... .. .... ... ... ... .... . . ..20
3.6 POWER SAVING MODES ..... . ... .... .. .. . . . ... .. .. .. . . .. .... .... .. . . ....22
3.6.1 Slow Mode .. ..... ... .. . . ..... .... .. .. .. . . ... .... . ..... .. .. . . .. ... .22
3.6.2 Wait Mode ..... . . . . . ... ..... . . .. .... ... ... ... ... .... .. .. .... .. ....22
3.6.3 Halt Mode . . . . . . . . . .. . . . ..... . ... .... .. .... ... . . . .... ... . . . ... . ....23
4 ON-CHIP PERIPHERALS . . . .... ... .. . . .. .. . . . .... . .... . . .. . . .... ... ... ... .... .24
4.1 I/O PORTS .. . . .. .. .... ... ... .. .. . . . . . . . . . . . . . . ... . . .. ... ... ... . . . ... ...24
4.1.1 Introduction . . . . . . . . .... . ..... . ..... ... ... .. ... . . . ... .... .. .. . .... .24
4.1.2 Generic I/O Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . . ... ... . . . 24
4.1.3 I/O Port Implementation . . . . . . . . . . . . ..... .... . .... ... . . . ... ..... . ... .. 27
4.2 SERIAL COMMUNICATIONS INTERFACE. . .... .. .... .. ..... .. .... . . . . . .... .. 28
4.2.1 Introduction . . . . . . . . .... . ..... . ..... ... ... .. ... . . . ... .... .. .. . .... .28
4.2.2 Features . . . . . . . . . . . . . . . ..... .. ... ... .... ... ... .. ... .. . .... ... .... .28
4.2.3 Serial Data Format . ..... .. .... ... . . . . . ... .... .. .... .. .. . . . . . ... .. ...28
4.2.4 Data Reception and Transmission . . . .... .. .... .. ... ... ... . . . . . ..... ... . 28
4.2.5 Receiver Muting and Wake-up Feature . . . . ..... .. ... . . . . . ... . . . ..... .. .. 28
4.2.6 Baud Rate Generation . . . .... . . .... . . . . ...... . . .. ..... ... . ..... .. .. .. 29
4.2.7 SCI Register Overview . . . .... . . .... . . . . ...... . . .. ..... ... . ..... .. .. .. 29
4.3 16-BIT TIMER . . . . .... .. .... .. ..... . . . ..... . ..... .. .... ... ... ... .... . . ..35
4.3.1 Introduction . . . . . . . . .... . ..... . ..... ... ... .. ... . . . ... .... .. .. . .... .35
4.3.2 Counter . . . . .... .. .... .. ..... . . . ..... . ..... .. .... ... ... ... .... . . ..35



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