IMX7SCEC datasheet(30/152 Pages) NXP

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Electrical characteristics

i.MX 7Solo Family of Applications Processors Datasheet, Rev. 5, 07/2017

NXP Semiconductors

needs to be applied to PMIC, it is done through the I2C/SPI interface before the processor enters a

low-power mode.

When the processor enters SUSPEND mode, it will assert the PMIC_STBY_REQ signal to PMIC. When

this signal is asserted, the processor allows the PMIC to shut off VDD_ARM externally. However, in some

application scenario, SW want to keep the data in L2 Cache to avoid performance impact on cache miss.

In this case, the VDD_ARM cannot be shut off. To support both scenarios, the PMIC should have an option

to shut off or keep VDD_ARM when it receives the PMIC_STBY_REQ. This should be configured

through I2C/SPI interface before the processor enters SUSPEND mode.

Except the VDD_ARM, the other power rails have to keep active in SUSPEND mode. Since the current

on each power rail is greatly reduced in this mode, PMIC can enter its own low power mode to get extra

power saving. For example, the PMIC can change the DCDC rails to PFM mode to reduce the power

consumption.

The power consumption in low power modes is defined in Table 15.

All the power numbers defined in Table 15 are based on typical silicon at 25°C.

Table 15. Low Power Measurements

Power rail

System IDLE

Low Power IDLE

SUSPEND

LPSR

Voltage Current Power Voltage Current Power Voltage Current Power Voltage Current Power

(V)

(mA)

(mW)

(V)

(mA)

(mW)

(V)

(mA)

(mW)

(V)

(mA)

(mW)

VDD_ARM

1.0

2.7

2.70

1.0

0.428

0.43

1.0

0.3

0.30

0.0

—

0.00

VDD_SOC

1.0

19.38

1.0

1.423

1.42

1.0

0.6

0.60

0.0

—

0.00

VDDA_1P8_IN

1.8

3.46

6.23

1.8

0.206

0.37

1.8

0.4

0.72

0.0

—

0.00

VDD_SNVS_IN

3.0

0.006

0.018

3.0

0.005

0.015

3.0

0.006

0.018

3.0

0.003

0.009

VDD_LPSR_IN

1.8

0.04

0.07

1.8

0.041

0.07

1.8

0.039

0.0702

1.8

0.04

0.07

NVCC_GPIO1/2

1.8

0.072

0.13

1.8

0.073

0.13

1.8

0.072

0.13

1.8

0.072

0.13

Total

—

28.53

—

2.45

—

1.84

—

0.21

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