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SX1512BIULTRT Datasheet(PDF) 2 Page - Semtech Corporation |
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SX1512BIULTRT Datasheet(HTML) 2 Page - Semtech Corporation |
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2 / 37 page 
ADVANCED COMMUNICATIONS & SENSING Rev 4 – 26 th April 2011 2 www.semtech.com SX1511B/SX1512B 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 SX1511B 8-channel SPI GPIO with LED Driver and Keypad Engine 4 1.2 SX1512B 16-channel SPI GPIO with LED Driver and Keypad Engine 5 1.3 I/Os Feature Summary 6 2 ELECTRICAL CHARACTERISTICS............................................................................................... 7 2.1 Absolute Maximum Ratings 7 2.2 Electrical Specifications 7 3 TYPICAL OPERATING CHARACTERISTICS ............................................................................... 10 4 BLOCK DETAILED DESCRIPTION ............................................................................................. 12 4.1 SX1511B 8-channel SPI GPIO with LED Driver and Keypad Engine 12 4.2 SX1512B 16-channel SPI GPIO with LED Driver and Keypad Engine 12 4.3 Reset 13 4.3.1 Hardware (NRESET) 13 4.3.2 Software (RegReset) 13 4.4 SPI Interface 13 4.4.1 WRITE 14 4.4.2 READ 14 4.5 I/O Banks 14 4.5.1 Input Debouncer 14 4.5.2 Keypad Scanning Engine 14 4.5.3 Level Shifter 15 4.5.4 Polarity Inverter 16 4.6 Interrupt (NINT) 16 4.7 Clock Management 17 4.8 LED Driver 17 4.8.1 Overview 17 4.8.2 Static Mode 18 4.8.3 Single Shot Mode 18 4.8.4 Blink Mode 19 4.8.5 LED Driver Modes 19 4.8.6 Synchronization of LED Drivers across several ICs 20 4.8.7 Tutorial 20 5 CONFIGURATION REGISTERS.................................................................................................. 22 5.1 SX1511B 8-channel GPIO with LED Driver and Keypad Engine 22 5.1 SX1512B 16-channel GPIO with LED Driver and Keypad Engine 26 6 APPLICATION INFORMATION ................................................................................................... 32 6.1 Typical Application Circuit 32 6.2 Typical LED Connection 32 7 PACKAGING INFORMATION ..................................................................................................... 33 7.1 QFN-UT 20-pin Outline Drawing 33 7.2 QFN-UT 20-pin Land Pattern 33 |
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