IDLE hardware handshake
Device
L4_STANDARD interconnect
System mailbox
MAIL_U1_IRQ
MAIL_U0_IRQ
Mailbox
(x12)
MAILBOX_FCLK
PRCM
SYSCLK6
Cortex-A8 subsystem
Interrupt controller
Interrupt controller
DSP subsystem
ALW_DOM_RST_N
MAILBOX_RST
VPSS-M3
Interrupt controller
MAIL_U2_IRQ
VPSS-M3
Interrupt controller
VIDEO-M3
Interrupt controller
MAIL_U3_IRQ
Preliminary
www.ti.com
Mailbox
1.13 Mailbox
1.13.1 Overview
Communication between the on-chip processors of the device uses a queued mailbox-interrupt
mechanism.
The queued mailbox-interrupt mechanism allows the software to establish a communication channel
between two processors through a set of registers and associated interrupt signals by sending and
receiving messages (mailboxes).
There are two mailbox module instances in the device:
•
System mailbox - used for Cortex-A8 microprocessor unit (Cortex-A8 MPU) and digital signal
processor (DSP) communications.
The mailbox module includes the following features:
•
Flexible assignment of receiver and sender for each mailbox through interrupt configuration
•
32-bit message width
•
Four-message FIFO depth for each message queue
•
Message reception and queue-not-full notification using interrupts
•
Support of 16-/32-bit addressing scheme
•
Power management support
1.13.2 System Mailbox Integration
This section describes the system mailbox integration in the device, including information about clocks,
resets, and hardware requests.
shows the system mailbox integration.
through
summarize the system mailbox integration in the device.
Figure 1-77. System Mailbox Integration
209
SPRUGX9 – 15 April 2011
Chip Level Resources
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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