AP0202AT datasheet(13/54 Pages) ONSEMI

13 / 54 page

AP0202AT/D Rev. 4, Pub. 9/15 EN

©Semiconductor Components Industries, LLC, 2015.

AP0202AT: Image Signal Processor (ISP)

On-Chip Regulator

Advance

On-Chip Regulator

The AP0202AT has an on-chip regulator, the output from the regulator is 1.2V and should

only be used to power up the AP0202AT. It is possible to bypass the regulator and provide

power to the relevant pins that need 1.2V. The following table summarizes the key

signals when using/bypassing the regulator.

Power-Up Sequence

Powering up the AP0202AT requires voltages to be applied in a particular order, as seen

in Figure 5. The timing requirements are shown in Table 6. The AP0202AT includes a

power-on reset feature that initiates a reset upon power up.

Figure 5:

Power-Up and Power-Down Sequence

Note:

1. When using XTAL the settling time should be taken into account.

2. RESET_BAR can be either high or low at power-up

Table 5:

Key Signals When Using the Regulator

Signal Name

Internal Regulator

External Regulator

VDD_REG

1.8V

Connect to VDDIO_H

ENLDO

Connect to 1.8V (VDD_REG)

GND

FB_SENSE

1.2V (input)

Float

LDO_OP

1.2V (output)

Float

EXT_REG

GND

Connect to VDDIO_H

VDDIO_H

VDD_REG

EXTCLK

SCLK

SDATA

VDDIO_S, VDDIO_OTPM,

VDD_PHY (when using HiSPi)

dv/dt

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