CONTENTS

12.6.1.4 Using Mixed Analog and Digital Inputs

12-13

12.6.2 Understanding A/D Conversion Errors

12-13

CHAPTER 13

 

MINIMUM HARDWARE CONSIDERATIONS

 

13.1

MINIMUM CONNECTIONS

13-1

13.1.1

Unused Inputs

13-2

13.1.2

I/O Port Pin Connections

13-2

13.2

APPLYING AND REMOVING POWER

13-4

13.3

NOISE PROTECTION TIPS

13-4

13.4

THE ON-CHIP OSCILLATOR CIRCUITRY

13-5

13.5

USING AN EXTERNAL CLOCK SOURCE

13-7

13.6

RESETTING THE DEVICE

13-8

13.6.1 Generating an External Reset

13-10

13.6.2 Issuing the Reset (RST) Instruction

13-12

13.6.3 Issuing an Illegal IDLPD Key Operand

13-12

13.6.4

Generating Wait States

13-12

13.6.5 Enabling the Watchdog Timer

13-12

CHAPTER 14

 

SPECIAL OPERATING MODES

 

14.1

SPECIAL OPERATING MODE SIGNALS AND REGISTERS

14-1

14.2

REDUCING POWER CONSUMPTION

14-3

14.3

IDLE MODE

14-4

14.4

POWERDOWN MODE

14-5

14.4.1 Enabling and Disabling Powerdown Mode

14-5

14.4.2

Entering Powerdown Mode

14-6

14.4.3

Exiting Powerdown Mode

14-6

14.4.3.1 Driving the Vpp Pin Low

14-6

14.4.3.2

Generating a Hardware Reset

14-6

14.4.3.3

Asserting the External Interrupt Signal

14-7

14.4.3.4 Selecting R1 and C1

14-8

14.5

ONCE MODE

14-10

14.6

RESERVED TEST MODES

14-11

CHAPTER 15

 

INTERFACING WITH EXTERNAL MEMORY

 

15.1

EXTERNAL MEMORY INTERFACE SIGNALS AND REGISTERS

15-1

15.2

CHIP CONFIGURATION REGISTERS AND CHIP CONFIGURATION BYTES

15-5

15.3

BUS WIDTH AND MULTIPLEXING

15-10

15.3.1

Timing Requirements for BUSWIDTH

15-13

15.3.2

16-bit Bus Timings

15-14

15.3.3

8-bit Bus Timings

15-16

ix

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Intel 8XC196MD, 8XC196MH, 8XC196MC manual Chapter Minimum Hardware Considerations