TMS320C6678
Multicore Fixed and Floating-Point Digital Signal Processor
SPRS691D—April 2013
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3.3.11 Power State Control (PWRSTATECTL) Register
The PWRSTATECTL register is controlled by the software to indicate the power-saving mode. ROM code reads this
register to differentiate between the various power saving modes. This register is cleared only by POR and will
survive all other device resets. See the Hardware Design Guide for KeyStone Devices in ‘‘Related Documentation from
Texas Instruments’’ on page 73 for more information. The Power State Control Register is shown in Figure 3-10 and
described in Table 3-12.
Figure 3-10
Power State Control Register (PWRSTATECTL)
31
3
2
1
0
GENERAL_PURPOSE
HIBERNATION_MODE
RW,+0
HIBERNATION
RW,+0
STANDBY
RW,+0
RW, +0000 0000 0000 0000 0000 0000 0000 0
Legend: RW = Read/Write; -n = value after reset
Table 3-12
Power State Control Register (PWRSTATECTL) Field Descriptions
Description
Bit
Field
31-3
GENERAL_PURPOSE
Used to provide a start address for execution out of the hibernation modes. See the Bootloader for the C66x DSP User
Guide in ‘‘Related Documentation from Texas Instruments’’ on page 73.
2
1
0
HIBERNATION_MODE Indicates whether the device is in hibernation mode 1 or mode 2.
0 = Hibernation mode 1
1 = Hibernation mode 2
HIBERNATION
STANDBY
Indicates whether the device is in hibernation mode or not.
0 = Not in hibernation mode
1 = Hibernation mode
Indicates whether the device is in standby mode or not.
0 = Not in standby mode
1 = Standby mode
End of Table 3-12
3.3.12 NMI Event Generation to CorePac (NMIGRx) Register
NMIGRx registers are used for generating NMI events to the corresponding CorePac. The C6678 has
eight NMIGRx registers (NMIGR0 through NMIGR7). The NMIGR0 register generates an NMI event to CorePac0,
the NMIGR1 register generates an NMI event to CorePac1, and so on. Writing a 1 to the NMIG field generates a
NMI pulse. Writing a 0 has no effect and reads return 0 and have no other effect. The NMI Even Generation to
CorePac Register is shown in Figure 3-11 and described in Table 3-13.
Figure 3-11
NMI Generation Register (NMIGRx)
31
1
0
Reserved
R, +0000 0000 0000 0000 0000 0000 0000 000
NMIG
RW,+0
Legend: RW = Read/Write; -n = value after reset
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Device Configuration 87
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