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32
Message out
Message in
Mailbox m
4 message FIFO
Local interface
Mailbox
Interconnect
32
32
32
MAILBOX_SYSCONFIG
System register
MAILBOX_IRQENABLE_CLR_u
MAILBOX_IRQENABLE_SET_u
MAILBOX_MSGSTATUS_m
MAILBOX_FIFOSTATUS_m
MAILBOX_MESSAGE_m
MAILBOX_IRQSTATUS_CLR_u
MAILBOX_IRQSTATUS_RAW_u
Interrupt registers
Interrupt
requests
Preliminary
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Mailbox
Each user has a dedicated interrupt signal from the corresponding mailbox module instance and dedicated
interrupt enabling and status registers. Each
MAILBOX_IRQSTATUS_RAW_u/MAILBOX_IRQSTATUS_CLR_u interrupt status register corresponds to
a particular user.
For the system mailbox instance, a user can query its interrupt status register through the L4_STANDARD
interconnect.
•
Cortex-A8 MPU and DSP - through the L3 interconnect
•
iCont1/iCont2 and DSP - private access (directly through the DSP local interconnect respectively)
1.13.3.1 Block Diagram
shows the mailbox block diagram.
Figure 1-78. Mailbox Block Diagram
1.13.3.2 Software Reset
The mailbox module supports a software reset through the MAILBOX_SYSCONFIG[0].SOFTRESET bit.
Setting this bit to 1 enables an active software reset that is functionally equivalent to a hardware reset.
Reading the MAILBOX_SYSCONFIG[0] SOFTRESET bit gives the status of the software reset:
•
Read 1: the software reset is on-going.
•
Read 0: the software reset is complete.
The software must ensure that the software reset completes before doing mailbox operations.
1.13.3.3 Power Management
describes power-management features available for the mailbox module.
211
SPRUGX9 – 15 April 2011
Chip Level Resources
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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