AM3871 datasheet(13/345 Pages) TI1

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Mailbox

Interconnect

Interrupt

Mailbox Module

ARM Cortex-A8

Media Controller

AM3874, AM3872, AM3871

www.ti.com

SPRS695

– SEPTEMBER 2011

2.8

Mailbox Module Overview

The device Mailbox module facilitates communication between the ARM Cortex-A8 and the Media

Controller. It consists of twelve mailboxes, each supporting a 1-way communication between two of the

above processors. The sender sends information to the receiver by writing a message to the mailbox

registers. Interrupt signaling is used to notify the receiver that a message has been queued or to notify the

sender about an overflow situation.

The Mailbox module supports the following features (see Figure 2-2):

•

12 mailboxes

•

Flexible mailbox-to-processor assignment scheme

•

Four-message FIFO depth for each message queue

•

32-bit message width

•

Message reception and queue-not-full notification using interrupts

•

Three interrupts (one to ARM Cortex-A8 and two to Media Controller)

Figure 2-2. Mailbox Module Block Diagram

For more details on the Mailbox Module, see the Mailbox section of the Chip Level Resources chapter of

the AM387x Sitara ARM Microprocessors (MPUs) Technical Reference Manual (Literature Number:

SPRUGZ7).

Device Overview

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Product Folder Link(s): AM3874 AM3872 AM3871

AM3871 Datasheet(PDF) 13 Page - Texas Instruments