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•
VIO(max) = 500 mA
•
VDD1(max) = 1000 mA
•
VDD2(max) = 1000 mA
To have the maximum current capability, the user must program the following register bits:
•
VIO_REG[ILMAX] = b01 for 1 A
•
VDD1_REG[ILMAX] = b1 for 1.5 A
•
VDD2_REG[ILMAX] = b1 for 1.5 A
3
Power-Up Sequencing
3.1
Power-Up Sequence for OMAPL-138 and TMS320C6742/6/8 Processors
The following sections show the power-up sequence requirement for OMAPL-138 and TMS320C6742/6/8
processors. To power on the system, the user must press and release the PWRON switch (generating a
negative pulse). The BOOT pads on the TPS65910 must be connected as follows:
•
BOOT0 = 0
•
BOOT1 = 1
Table 1
lists the power rail requirements for OMAPL-138, TMS320C6742/6/8.
Table 1. Power Rail Requirements for OMAPL-138, TMS320C6742/6/8
Power Domain
I/O
RTC_CVDD
Core
CVDD
I/O
RVDD, PLL0_VDDA, PLL1_VDDA, SATA_VDD,
USB_CVDD, USB0_VDDA12
I/O
USB0_VDDA18, USB1_VDDA18, DDR_DVDD18,
SATA_VDDR, DVDD18
I/O
USB0_VDDA33, USB1_VDDA33
I/O
DVDD3318_A, DVDD3318_B, DVDD3318_C
(1) If RTC is not used/maintained on a separate supply, it can be included in the STATIC12 (fixed 1.2 V) group.
(2) If using CVDD at fixed 1.2 V, all 1.2-V rails may be combined. CVDD can support 1.3 V; in this case SMPS (VDD1) supplying
CVDD core can be set to 1.3-V after initial power up.
(3) If 1.8-V LVCMOS is used, power rails up with the 1.8-V rails. If 3.3-V LVCMOS is used, power it up with the ANALOG33 rails
(VDDA33_USB0/1).
(4) There is no specific required voltage ramp rate for any of the supplies LVCMOS33 (USB0_VDDA33, USB1_VDDA33) that
never exceeds STATIC18 by more than 2 V.
(5) If DVDD3318_A, B, and C are powered independently, maximum power for each rail will be 1/3 the above maximum power.
These rails can be connected independently to 1.8 or 3.3 V.
3.2
Power-Up Sequence for OMAPL-137 Processor
Table 2
lists the power rail requirements for OMAPL-137.
Power Domain
Core
RTC_CVDD
CVDD
PLL0_VDDA, RVDD
I/O
USB0_VDDA18, USB1_VDDA18
I/O
DVDD, USB0VDDA33, USB1_VDDA33
SWCU071B – December 2010 – Revised October 2015
Submit Documentation Feedback
Pin Name
(2)
(3)(4)
Table 2. Power Rail Requirements for OMAPL-137
Pin Name
(1)
TPS65910 User Guide For OMAPL-137, OMAPL-138, and TMS320C674x
Copyright © 2010–2015, Texas Instruments Incorporated
Power-Up Sequencing
I
(mA)
Voltage (V)
max
1
1.2
600
1.0/1.1/1.2
200
1.2
180
1.8
24
3.3
(5)
90
3.3
(2)
I
(mA)
Voltage (V)
max
0.1
1.2
600
1.2
60
1.2
50
1.8
115
3.3
Family of Processors
Sequence
(1)
1
2
3
4
5
5
Sequence
1
2
3
5
4
7
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