TI LM8330TMX/NOPB

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 DSBSA package size 2.0 mm x 2.0 mm x 0.6 mm (0.4 mm pitch). The LM8330 has integrated ASIC (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.

• Keypad Matrices of up to of 8 x 12 Keys, Plus 8 Special Function (SF) Keys, for a Full 104 Key Support.
• Supports General - purpose I/O Expansion on Pins Not Otherwise Used for Keypad or PWM Output.
• Keypad Matrix and Dedicated Key Support: 16 - Event Keycode Buffer
• 4 - Event Multiple Key Storage Registers
• Internal Oscillator, No External Clock Required.
• I²C - compatible ACCESS.bus Slave Interface Standard (100 kHz) and Fast (400 kHz) Modes: 7 - bit and 10 - bit Addressing
• Programmable Slave Address (Default 7 - bit 0x88, 10 - bit 0x088)
• Three Host - programmable PWM Outputs
• Smooth LED Brightness Modulation
• Dedicated 31 - command Script Bugger
• Register - based Command Interpreter with Auto - increment Addressing
• Key Events, Errors, and Dedicated Hardware Interrupts, Request Host Service by Asserting an IRQ Output
• Ultra - Low - Power Operation
• Automatic HALT Mode: 1.5μA (typ.)
• Active Supply Current: 23μA (typ.)
• Configurable Wake - Up from HALT Operation
• IEC61000 - 4 - 2 ESD Protection on KPX[7:0] and KPY[10:0] pins
• ESD Glitch Filter on RESETN Input
• External Reset for System Control
• HOST - CONTROLLED FEATURES
• Reset Input for System Control
• PWM Scripting for Three PWM Outputs
• Period of Inactivity That Triggers Entry into HALT Mode
• Debounce Time for Reliable Key Event Polling
• Configuration of General Purpose I/O Ports
• Various Initialization Options (Keypad Size, etc.)
• 1.8V ± 10% Single - supply Operation
• On - chip Power - on Reset (POR)
• • 30℃ to + 85℃ Temperature Range
• Robust IEC ESD Protection: ± 8kV Direct Contact on KPX[7:0] and KPY[10:0] Pins

• Mobile Phones
• Qwerty Keyboard
• Universal Remote