Texas Instruments Hercules TMS570LS04x/03x LaunchPad Evaluation Kit LAUNCHXL-TMS57004 LAUNCHXL-TMS57004 Data Sheet
Product codes
LAUNCHXL-TMS57004
SPNS186A – OCTOBER 2012 – REVISED SEPTEMBER 2013
4.2
Power Sequencing and Power On Reset
4.2.1
Power-Up Sequence
There is no timing dependency between the ramp of the VCCIO and the VCC supply voltage. The power-
up sequence starts with the I/O voltage rising above the minimum I/O supply threshold, (see
up sequence starts with the I/O voltage rising above the minimum I/O supply threshold, (see
for
more details), core voltage rising above the minimum core supply threshold and the release of power-on
reset. The high frequency oscillator will start up first and its amplitude will grow to an acceptable level. The
oscillator start up time is dependent on the type of oscillator and is provided by the oscillator vendor. The
different supplies to the device can be powered up in any order.
reset. The high frequency oscillator will start up first and its amplitude will grow to an acceptable level. The
oscillator start up time is dependent on the type of oscillator and is provided by the oscillator vendor. The
different supplies to the device can be powered up in any order.
The device goes through the following sequential phases during power up.
Table 4-3. Power-Up Phases
Oscillator start-up and validity check
1032 oscillator cycles
eFuse autoload
1160 oscillator cycles
Flash pump power-up
688 oscillator cycles
Flash bank power-up
617 oscillator cycles
Total
3497 oscillator cycles
The CPU reset is released at the end of the above sequence and fetches the first instruction from address
0x00000000.
0x00000000.
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System Information and Electrical Specifications
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