LM8330中文资料具有 GPIO、PWM 和 IEC61000 ESD 保护的 I2C 兼容键盘控制器数据手册TI规格书

描述 Description

The LM8330 I/O - Expander and Keypad Controller is a dedicated device designed to unburden a host processor from scanning a matrix-addressed keypad and to provide flexible and general purpose, host programmable input/output functions. Three independent Pulse Width Modulation (PWM) timer outputs are provided for dynamic LED brightness modulation. It communicates with a host processor through an I2C-compatible ACCESS.bus serial interface. It can communicate in Standard (100 kHz) and Fast-Mode (400 kHz) in slave Mode only. All available input/output pins can alternately be used as an input or an output in a keypad matrix or as a host-programmable general-purpose input or output. Any pin programmed as an input can also sense hardware interrupts. The interrupt polarity (“high-to-low” or “low-to-high” transition) is thereby programmable. The LM8330 follows a predefined register-based set of commands. Upon startup (power-on) a configuration file must be sent from the host to set up the hardware of the device.The LM8330 is available in a 25-bump lead-free DSBGA package size 2.0 mm x 2.0 mm x 0.6 mm (0.4 mm pitch).The LM8330 has integrated ASIP (Application Specific Integrated Passives) on the KPX[7:0] and KPY[10:0] pins. These pins are designed to tolerate IEC61000-4-2 level 4 ESD: ±8 kV direct contact.

特性 Features

• KEY FEATURES
• Supports General-purpose I/O Expansion on Pins Not Otherwise Used for Keypad or PWM Output.
• Internal Oscillator, No External Clock Required.
• Three Host-programmable PWM OutputsSmooth LED Brightness ModulationDedicated 31-command Script BuggerRegister-based Command Interpreter with Auto-increment Addressing
• Ultra-Low-Power OperationAutomatic HALT Mode: 1.5 µA (typ.)Active Supply Current: 23 µA (typ.)Configurable Wake-Up from HALT Operation
• ESD Glitch Filter on RESETN Input
• HOST-CONTROLLED FEATURES
• PWM Scripting for Three PWM Outputs
• Debounce Time for Reliable Key Event Polling
• Various Initialization Options (Keypad Size, etc.)
• KEY DEVICE FEATURES
• On-chip Power-on Reset (POR)
• Robust IEC ESD Protection: ±8 kV Direct Contact on KPX[7:0] and KPY[10:0] Pins
• 25-pin DSBGA Package Size: 2 mm x 2 mm x 0.6 mm (0.4 mm Pitch)