AM3874 datasheet(17/361 Pages) TI

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Mailbox

Interconnect

Interrupt

Mailbox Module

ARM Cortex-A8

Media Controller

AM3874, AM3871

www.ti.com

SPRS695C – SEPTEMBER 2011 – REVISED DECEMBER 2013

2.8

Mailbox Module Overview

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

Controller. The device mailbox 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 Processors Technical Reference Manual (Literature Number: SPRUGZ7).

Device Overview

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Product Folder Links: AM3874 AM3871

AM3874 Datasheet(PDF) 17 Page - Texas Instruments