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SX1512BIULTRT Datasheet(PDF) 2 Page - Semtech Corporation

Part No. SX1512BIULTRT
Description  World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
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Maker  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
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SX1512BIULTRT Datasheet(HTML) 2 Page - Semtech Corporation

 
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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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