GENERAL DESCRIPTION
The MEC140X/1X is a family of keyboard and embedded controller designs customized for notebooks and tablet platforms. The MEC140X/1X family is a highly-configurable, mixed signal, advanced I/O controller architecture. Every device in the family incorporates a 32-bit MIPS32 M14K Microcontroller core with a closely-coupled SRAM for code and data. A secure boot-loader is used to download the custom firmware image from the system’s shared SPI Flash device, thereby allowing system designers to customize the device’s behavior.

Common Features
• 3.3V Operation
• ACPI 3.0 Compliant
• PC2001 compliant
• VTR (standby) and VBAT Power Planes
    - Low Standby Current in Sleep Mode
• Connected Standby Support
• 32kHz Clock Source
    - Internal 32kHz Oscillator
    - External 32kHz Clock Source
        - 32kHz Crystal (XTAL) Supported
        - Single-Ended 32kHz Clock Source
• LPC Host Interface
    - LPC Specification 1.1 Compatible
    - LPC I/O and Memory Cycles Decoded
    - Supports optional signals: CLKRUN#, LPCPD#, SERIRQ, SMI#, EC_SCI# (ACPI PME Event)
    - Supports 19.2 MHz to 33 MHz nominal bus clock speeds
• Configuration Register Set
    - Compatible with ISA Plug-and-Play Standard
    - EC-Programmable Base Address
• 8042 Emulated Keyboard Controller
    - 8042 Style Host Interface
    - Port 92 Legacy A20M Support
    - Fast GATEA20 & Fast CPU_RESET
• System to EC Message Interface
    - One Embedded Memory Interface
        - Host Serial or Parallel IRQ Source
        - Provides Two Windows to On-Chip SRAM for Host Access
        - Two Register Mailbox Command Interface
    - Mailbox Registers Interface
        - Thirty-two 8-Bit Scratch Registers
        - Two Register Mailbox Command Interface
        - Two Register SMI Source Interface
    - Five ACPI Embedded Controller Interfaces
        - Four EC Interfaces
        - One Power Management Interface
• MIPS32® M14K™ Microcontroller Core
    - microMIPS-Compatible Instruction Set
    - High-performance Multiply/Divide Unit
    - Programmable clock frequencies: 48MHz, 12MHz, 3MHz, and 1MHz
    - Sleep mode
    - 2-wire Debug Interface (ICSP)
        - 6 Breakpoints (4-instruction; 2-data)
        - Enhanced to Support Debug in Heavy and Deep Sleep States
• Trace FIFO Debug Port (TFDP)
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