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SX1507 Datasheet(PDF) 2 Page - Semtech Corporation |
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SX1507 Datasheet(HTML) 2 Page - Semtech Corporation |
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2 / 41 page  ADVANCED COMMUNICATIONS & SENSING Rev 1 – 30 th Oct. 2009 2 www.semtech.com SX1507/SX1508/SX1509 World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine Table of Contents GENERAL DESCRIPTION ..................................................................................................................... 1 ORDERING INFORMATION................................................................................................................... 1 KEY PRODUCT FEATURES.................................................................................................................. 1 TYPICAL APPLICATIONS ..................................................................................................................... 1 1 PIN DESCRIPTION ...................................................................................................................... 4 1.1 SX1507 4-channel I 2C GPIO with LED Driver 4 1.2 SX1508 8-channel I 2C GPIO with LED Driver and Keypad Engine 5 1.3 SX1509 16-channel I 2C GPIO with LED Driver and Keypad Engine 6 1.4 I/Os Feature Summary 7 2 ELECTRICAL CHARACTERISTICS............................................................................................... 8 2.1 Absolute Maximum Ratings 8 2.2 Electrical Specifications 8 3 TYPICAL OPERATING CHARACTERISTICS ............................................................................... 11 4 BLOCK DETAILED DESCRIPTION ............................................................................................. 12 4.1 SX1507 4-channel I 2C GPIO with LED Driver 12 4.2 SX1508 8-channel I 2C GPIO with LED Driver and Keypad Engine 12 4.3 SX1509 16-channel I 2C GPIO with LED Driver and Keypad Engine 13 4.4 Reset 13 4.4.1 Hardware (NRESET) 13 4.4.2 Software (RegReset) 14 4.5 2-Wire Interface (I 2C) 14 4.5.1 WRITE 14 4.5.2 READ 15 4.6 I/O Banks 15 4.6.1 Input Debouncer 15 4.6.2 Keypad Scanning Engine 16 4.6.3 Level Shifter 16 4.6.4 Polarity Inverter 18 4.7 Interrupt (NINT) 18 4.8 Clock Management 18 4.9 LED Driver 18 4.9.1 Overview 18 4.9.2 Static Mode 19 4.9.3 Single Shot Mode 20 4.9.4 Blink Mode 20 4.9.5 LED Driver Modes 20 4.9.6 Synchronization of LED Drivers across several ICs 21 4.9.7 Tutorial 22 5 CONFIGURATION REGISTERS.................................................................................................. 23 5.1 SX1507 4-channel GPIO with LED Driver 23 5.2 SX1508 8-channel GPIO with LED Driver and Keypad Engine 26 5.3 SX1509 16-channel GPIO with LED Driver and Keypad Engine 30 6 APPLICATION INFORMATION ................................................................................................... 36 6.1 Typical Application Circuit 36 6.2 Typical LED Connection 36 |
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