MEC1404 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

MEC1404

Keyboard and Embedded Controller Products for Notebook PC

Microchip Technology 

MEC140X/1X

1.4.3 I2C HOST SYSTEM BLOCK DIAGRAM

CPU

S0 (Main)

Power

Supply

PECI 3.0

Interface

PCH

SPI Interface

(3.3V only)

Shared

Flash

Fans or

General

Use

VCC_PWRGD

TACHs (2)

PWMs (8)

nRESET_OUT,

nRESET_IN,

RSMRST# (GPIO)

2‐pin Debug

32Khz

UART

2‐pin Debug

Trace FIFO

Debug Port

ICSP or JTAG

TFDP

Breathing PWM

MEC14xx

32‐Bit PC Embedded

Controller

LEDs

PS/2

(3x)

KeyScan

SMBus

SMBus/I2C

PS/2

SPI I/F

PS/2

Mouse

PS/2

Keyboard

Keyboard

Battery

Pack

SMBus/I2C

Device (s)

Voltage Monitoring

ADCs (8) (e.g., Thermistors,

Power Supplies)

Voltage Generator

DACs (2) (e.g., DC Controlled

Fans)

VCI_OUT

SYSPWR_PRES

S5 (Suspend)

Power Supply

VCI_OVRD_IN ACAVCHARGER

VCI_IN[1:0]# Power Button(s)

BGPO

Battery Powered

GPIO

BC‐Link (2x)

GPIOs

BC‐Link

Companion

Chip(s)

Private SPI Flash

(accessible on

KeyScan pins)

1.5 MEC140x Internal Address Spaces

The Internal Embedded Controller can access any register in the EC Address Space or Host Address Space. The LPC

and eSPI Host Controllers can directly access peripheral registers in the Host Address Space. If the I2C interface is

used as the Host Interface, access to all the IP Peripherals is dependent on the EC firmware.

Note: The eSPI and LPC Host Controllers also have access to the SRAM data space via the SRAM Memory

BARs, which is not illustrated below.

DS00001956D-page 10

 2015 - 2016 Microchip Technology Inc.

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