1FEATURES
2• KEY FEATURES
– 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: 1.5 μA (typ.)
– Active Supply Current: 23 μA (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 to–
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.)
• KEY DEVICE FEATURES
– 1.8V ±10% Single-supply Operation
– On-chip Power-on Reset (POR)
– −30°C to +85°C Temperature Range
– 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)

APPLICATIONS:
• Mobile Phones
• Qwerty Keyboard
• Universal Remote

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.