TMS320DM814X datasheet(23/377 Pages) TI1

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Mailbox

Interconnect

Interrupt

Mailbox Module

ARM Cortex-A8

C674x+ DSP

Media Controller

TMS320DM8148, TMS320DM8147

www.ti.com

SPRS647E – MARCH 2011 – REVISED DECEMBER 2013

2.11 Mailbox Module Overview

The device Mailbox module facilitates communication between the ARM Cortex-A8, C674x DSP, 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 2-4):

•

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

•

Four interrupts (one to ARM Cortex-A8, one to C674x, and two to Media Controller)

Figure 2-4. Mailbox Module Block Diagram

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

the TMS320DM814x DaVinci Digital Media Processors Technical Reference Manual (Literature Number:

SPRUGZ8).

Device Overview

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Product Folder Links: TMS320DM8148 TMS320DM8147

TMS320DM814X Datasheet(PDF) 23 Page - Texas Instruments