FUNCTIONAL DEVICE OPERATION
OPERATING MODES
Table 26. Power Up Defaults Table
i.MX
37/51
GND
Open
37/51
Open
Open
37/51
VCOREDIG
Open
37/51
VCORE
Open
35
27/31
Open
GND
PUMS1
PUMS2
GND
GND
SW1 (37)
SW2 (37)
SW3 (37)
SW4 (37)
SWBST
VUSB
0.775
1.025
1.200
1.800
Off
3.300 (38)
2.600
1.800
1.250
2.775
3.150
Off
1.050
1.225
1.200
1.800
Off
3.300 (38)
2.600
1.800
1.250
2.775
Off
1.050
1.225
1.200
1.800
Off
3.300 (38)
2.600
1.800
1.250
2.775
3.150
Off
0.775
1.025
1.200
1.800
Off
3.300 (38)
2.600
1.800
1.250
2.775
Off
1.200
1.350
1.800
1.800
5.000
3.300 (40)
2.600
1.500
1.250
2.775
3.150
3.150
1.200
1.450
1.800
1.800
5.000
3.300 (40)
2.600
1.500
1.250
2.775
3.150
3.150
VUSB2
VPLL
VDIG
VIOHI
VGEN2
VSD
Off
Off
Notes
37. The switchers SWx are activated in PWM pulse skipping mode, but allowed when enabled by the startup sequencer.
38. USB supply VUSB, is only enabled if 5.0 V is present on UVBUS.
39. The following supplies are not included in the matrix since they are not intended for activation by the startup sequencer: VCAM, VGEN1,
VGEN3, VVIDEO, and VAUDIO
40. SWBST = 5.0 V powers up and does VUSB regardless of 5.0 V present on UVBUS. By default VUSB will be supplied by SWBST.
The power up sequence is shown in Table 27. VCOREDIG, VSRTC, and VCORE are brought up in the pre-sequencer startup.
Once VCOREDIG is activated (i.e., at the first-time power application), it will be continuously powered as long as a valid coin cell
is present.
13892
Analog Integrated Circuit Device Data
Freescale Semiconductor
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