PRCM
PRM
sys_nrespwron
sys_nreswarm
prcm-014
Device
PRCM
PRM
sys_nvmode1
sys_off_mode
prcm-015
sys_nvmode2
Device
/i2c4_scl
/i2c4_sda
Public Version
www.ti.com
PRCM Environment
Figure 3-15. External Reset Signals
Table 3-3. External Reset Signals
Signal
I/O
(1)
Description
Module Reset Value
sys_nreswarm
I/O
Warm-boot reset
1
sys_nrespwron
I
Power-on reset
Unknown
(1)
I = Input; O = Output
NOTE:
sys_nrespwron must be kept asserted until the voltage and power domains are ramped up
which depends on the power IC used. At the PRCM boundary, a sys_nrespwron pulse of 1
ns resets the device.
sys_nreswarm assertion is asynchronously sampled in the PRM. It is kept internally
asserted.
3.3.3 External Power Signals
The power control signals let the PRCM module control the device voltage levels. The voltage level of the
scalable voltage sources in the external power IC can be scaled by sending commands to the power IC
through this interface. The PRCM module can also command the power IC to switch the device voltages
off when the device is in off mode and activate them when it wakes up.
shows the power control interface for the external power IC.
lists the signals, I/Os,
and module reset values for the external power IC.
Figure 3-16. Power Control Interface for External Power IC
Table 3-4. Power Control Interface
Signal
I/O
(1)
Description
Module Reset
Value
sys_nvmode1/i2c4_scl
O
Commands the external power IC for control of VDD1 and VDD2
0x1
voltages
Shared by the VMODE interface and the SmartReflex dedicated
I
2
C interface
(1)
I = Input; O = Output
245
SWPU177N – December 2009 – Revised November 2010
Power, Reset, and Clock Management
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
Страница 174: ...174 List of Tables SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...