MEC1632 datasheet(151/636 Pages) MICROCHIP

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 2012-2018 Microchip Technology Inc.

DS00001592B-page 151

MEC1632

8.0

EMBEDDED MEMORY INTERFACE

8.1

General Description

The Embedded Memory Interface provides a standard run-time mechanism for the host to communicate with the

Embedded Controller (EC) and other logical components in the MEC1632 (Figure 8-1). The Embedded Memory Inter-

face includes 12 byte-addressable registers in the Host’s I/O address space, as well as 20 bytes of registers that are

accessible only by the EC. The Embedded Memory Interface can be used by the Host to read any byte in a region of

EC closely-coupled memory, designated by the EC, without requiring any assistance from the EC. A portion of the mem-

ory can be written by the Host without any EC assistance as well.

8.1.1

BLOCK DIAGRAM

8.2

Power, Clocks and Reset

8.2.1

POWER DOMAIN

This block is powered by the VTR power supply.

8.2.2

CLOCKS

This block has two clock inputs, the LPC Bus Clock and the EC clock.

The Embedded Memory Interface includes support for system-level clock gating. The clock required output is the

inversion of the sleep enable input.

8.2.3

RESET

This block is reset when nSYS_RST is asserted.

FIGURE 8-1:

EMBEDDED MEMORY INTERFACE BLOCK DIAGRAM

Host-to-EC

EC-to-Host

DCCM

HOST

Int

SMI or PME

Host Interrupt Source

Embedded Memory Address

Embedded Memory Data

Addr

Data

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