UPD77533 datasheet(7/104 Pages) RENESAS

7 / 104 page

Data Sheet S15671EJ4V0DS

µµµµPD77533

CONTENTS

1. Pin Functions........................................................................................................................................... 9

1.1

Explanation of Pin Functions ........................................................................................................................ 9

1.2

Handling of Unused Pins ............................................................................................................................. 11

1.2.1

Function pins .................................................................................................................................... 11

1.2.2

Non-function pins.............................................................................................................................. 11

1.2.3

Pin I/O circuits .................................................................................................................................. 12

2. OVERVIEW OF FUNCTIONS ................................................................................................................. 13

2.1

List of Functions and Commands ............................................................................................................... 13

2.2

Host Serial Commands ................................................................................................................................ 14

2.2.1

Command format .............................................................................................................................. 14

2.2.2

Asynchronous serial ......................................................................................................................... 14

3. RESET..................................................................................................................................................... 14

3.1

Reset (Hardware Reset via RESETB Pin) ................................................................................................... 14

3.1.1

Status of pins at hardware reset ....................................................................................................... 15

3.1.2

Internal parameter initialization......................................................................................................... 16

3.2

Reset (Software Reset by Reset Command) .............................................................................................. 17

3.3

Processing Required at Startup .................................................................................................................. 17

4. COMMUNICATION ERROR CONTROL ................................................................................................18

4.1

Format Error, Undefined CMD-ID Error....................................................................................................... 18

4.1.1

When command from host CPU is server command........................................................................ 18

4.1.2

When command from host CPU is local command .......................................................................... 20

4.2

Timeout Error (Command Packet Interruption) ......................................................................................... 20

4.2.1

Character timeout setting ................................................................................................................. 21

4.2.2

Character timeout operation ............................................................................................................. 21

4.3

Timeout Error (No Response from

µµµµPD77533)........................................................................................... 22

5. POSITIONING CONTROL ...................................................................................................................... 24

5.1

Items That Must Be Set Before Start of Positioning .................................................................................. 25

5.1.1

Reference frequency ........................................................................................................................ 25

5.1.2

Frequency adjustment function (FCC).............................................................................................. 25

5.1.3

TXACTV control................................................................................................................................ 26

5.1.4

Doppler search range ....................................................................................................................... 26

5.1.5

Flow point output .............................................................................................................................. 26

5.2

RF Block ON.................................................................................................................................................. 27

5.2.1

AGC and DCOFF output signals ...................................................................................................... 27

5.3

GPS Signal Reception (SnapShot Execution) ............................................................................................ 27

5.4

RF Block OFF ................................................................................................................................................ 28

5.5

Pseudo Range Calculation .......................................................................................................................... 28

5.6

Positioning Result Notification.................................................................................................................... 28

5.7

Positioning End Notification........................................................................................................................ 28

5.8

Commands That Cannot Be Sent During Positioning ............................................................................... 28

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