UPD17217CT-XXX View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD17217CT-XXX

4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

NEC => Renesas Technology 

µPD17215, 17216, 17217, 17218

CONTENTS

1. PIN FUNCTIONS .............................................................................................................................. 7

1.1 Pin Function List ..................................................................................................................................... 7

1.2 Input/Output Circuits ............................................................................................................................... 8

1.3 Processing of Unused Pins ..................................................................................................................... 9

1.4 Notes on Using INT and RESET Pins ..................................................................................................... 9

2. MEMORY SPACE ............................................................................................................................. 10

2.1 Program Counter (PC) ............................................................................................................................ 10

2.2 Program Memory (ROM) ........................................................................................................................ 10

2.3 Stack ....................................................................................................................................................... 12

2.4 Data Memory (RAM) ............................................................................................................................... 14

2.5 Register File (RF) ................................................................................................................................... 21

3. PORTS .............................................................................................................................................. 24

3.1 Port 0A (P0A0-P0A3) ............................................................................................................................... 24

3.2 Port 0B (P0B0-P0B3) ............................................................................................................................... 24

3.3 Port 0C (P0C0-P0C3) .............................................................................................................................. 24

3.4 Port 0D (P0D0-P0D3) .............................................................................................................................. 24

3.5 Port 0E (P0E0-P0E3) ............................................................................................................................... 24

3.6 INT Pin .................................................................................................................................................... 25

3.7 Switching Bit I/O ..................................................................................................................................... 26

3.8 Specifying Pull-up Sesistor Connection ................................................................................................... 27

4. CLOCK GENERATOR CIRCUIT ...................................................................................................... 28

4.1 Instruction Execution Time (CPU Clock) Selection ................................................................................. 28

5. 8-BIT TIMER AND REMOTE CONTROLLER CARRIER GENERATOR CIRCUIT ........................ 29

5.1 Configuration of 8-bit Timer (with modulo function) ................................................................................. 29

5.2 Function of 8-bit Timer (with modulo function) ........................................................................................ 31

5.3 Carrier Generator Circuit for Remote Controller ...................................................................................... 32

6. BASIC INTERVAL TIMER/WATCHDOG TIMER ............................................................................. 36

6.1 Source Clock for Basic Interval Timer ..................................................................................................... 36

6.2 Controlling Basic Interval Timer .............................................................................................................. 36

6.3 Operation Timing for Watchdog Timer .................................................................................................... 38

7. INTERRUPT FUNCTIONS ................................................................................................................ 39

7.1 Interrupt Sources .................................................................................................................................... 39

7.2 Hardware of Interrupt Control Circuit ...................................................................................................... 40

7.3 Interrupt Sequence ................................................................................................................................. 44

5

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