TMS320C674x Megamodule
73
SPRUH91D – March 2013 – Revised September 2016
Copyright © 2013–2016, Texas Instruments Incorporated
DSP Subsystem
Table 2-1. DSP Interrupt Map (continued)
Event
Interrupt Name
Source
117
UMC_ED2
C674x-UMC
118
PDC_INT
C674x-PDC
119
SYS_CMPA
C674x-SYS
120
PMC_CMPA
C674x-PMC
121
PMC_CMPA
C674x-PMC
122
DMC_CMPA
C674x-DMC
123
DMC_CMPA
C674x-DMC
124
UMC_CMPA
C674x-UMC
125
UMC_CMPA
C674x-UMC
126
EMC_CMPA
C674x-EMC
127
EMC_BUSERR
C674x-EMC
2.2.2.1.1 Interrupt Controller Registers
For more information on the DSP interrupt controller (INTC) registers, see the
TMS320C674x DSP
Megamodule Reference Guide
2.2.2.1.2 NMI Interrupt
In addition to the interrupts listed in
, the DSP also supports a special interrupt that behaves
more like an exception, non-maskable interrupt (NMI). The NMI interrupt is controlled by two registers in
the System Configuration Module, the chip signal register (CHIPSIG) and the chip signal clear register
(CHIPSIG_CLR).
The NMI interrupt is asserted by writing a 1 to the CHIPSIG4 bit in CHIPSIG. The NMI interrupt is cleared
by writing a 1 to the CHIPSIG4 bit in CHIPSIG_CLR. For more information on the System Configuration
Module, CHIPSIG, and CHIPSIG_CLR, see the
System Configuration (SYSCFG) Module
chapter.
2.2.2.2
Power-Down Controller (PDC)
The C674x megamodule includes a power-down controller (PDC). The PDC can power-down all of the
following components of the C674x megamodule and internal memories of the DSP subsystem:
•
C674x CPU
•
Level 1 program memory controller (PMC)
•
Level 1 data memory controller (DMC)
•
Level 2 unified memory controller (UMC)
•
Extended memory controller (EMC)
•
Internal Direct Memory Access controller (IDMA)
•
L1P memory
•
L1D memory
•
L2 memory
This device supports the static power-down feature from the C674x megamodule. The
TMS320C674x
DSP Megamodule Reference Guide
(
) describes the power-down control in more detail.
•
Static power-down: The PDC initiates power-down (clock gating) of the entire C674x megamodule and
all internal memories immediately upon command from software.