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TMS320C6474
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SPRS552F – OCTOBER 2008 – REVISED JULY 2010
Some peripherals can be statically powered down at device reset through the device configuration pins
(see
Section 3.1
, Device Configuration at Device Reset). Once in a static power-down state, the peripheral
is held in reset and its clock is turned off. Peripherals cannot be enabled once they are in a static
power-down state. To take a peripheral out of the static power-down state, a device reset must be
executed with a different configuration pin setting.
After device reset, all peripherals on the C6474 device are in a disabled state and must be enabled by
software before being used. It is possible to enable only the peripherals needed by the application while
keeping the rest disabled. Note that peripherals in a disabled state are held in reset with their clocks
gated. For more information on how to enable peripherals, see
Section 3.2
, Peripheral Selection After
Device Reset.
Peripherals used for booting, like I2C, are automatically enabled after device reset. It is possible to disable
peripherals used for booting after the boot process is complete. This, too, results in gating of the clock(s)
to the powered-down peripheral. Once a peripheral is powered-down, it must remain powered down until
the next device reset.
The C64x+ Megamodule also allows for software-driven power-down management for all of the C64x+
Megamodule components through its Power-Down Controller (PDC). The CPU can power-down part or
the entire C64x+ Megamodule through the power-down controller based on its own execution thread or in
response to an external stimulus from a host or global controller. More information on the power-down
features of the C64x+ Megamodule can be found in the TMS Megamodule Reference Guide
(literature number
SPRU871
).
Table 7-2
lists the Power/Sleep Controller (PSC) registers.
Table 7-2. Power/Sleep Controller Registers
HEX ADDRESS
ACRONYM
REGISTER NAME
02AC 0000
PID
Peripheral Revision and Class Information
02AC 0120
PTCMD
Power Domain Transition Command Register
02AC 0128
PTSTAT
Power Domain Transition Status Register
02AC 0200
PDSTAT
Power Domain Status Register
02AC 0300
PDCTL0
Power Domain Control Register 0 (AlwaysOn)
02AC 0304
PDCTL1
Power Domain Control Register 1 (Antenna Interface)
02AC 0308
PDCTL2
Power Domain Control Register 2 (Serial RapidIO)
02AC 030C
-
Reserved
02AC 0310
PDCTL4
Power Domain Control Register 4 (TCP)
02AC 0314
PDCTL5
Power Domain Control Register 5 (VCP)
02AC 0800
-
Reserved
02AC 0804
-
Reserved
02AC 0808
-
Reserved
02AC 080C
MDSTAT3
Module Status Register 3 (C64x+ Core 0)
02AC 0810
MDSTAT4
Module Status Register 4 (C64x+ Core 1)
02AC 0814
MDSTAT5
Module Status Register 5 (C64x+ Core 2)
02AC 0818
MDSTAT6
Module Status Register 6 (Antenna Interface)
02AC 081C
MDSTAT7
Module Status Register 7 (Serial RapidIO)
02AC 0820
-
Reserved
02AC 0824
MDSTAT9
Module Status Register 9 (TCP)
02AC 0828
MDSTAT10
Module Status Register 10 (VCP)
02AC 082C
MDSTAT11
Module Status Register 11 (Never Gated)
02AC 0A00
-
Reserved
02AC 0A04
-
Reserved
02AC 0A08
-
Reserved
Copyright © 2008–2010, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
77
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