A product Line of

Diodes Incorporated

14 of 51

www.diodes.com

February 2020

© Diodes Incorporated

PI3DPX1202A

Document number: DS40115 Rev 3-3

PI3DPX1202A

Reset Implementation

When ENABLE is Low, the device is power-down mode and output are high impedance. It is critical to transition the ENABLE after the

power supply VDD has reached the minimum recommended operation voltage. This can be achieved by the control signal GPO or by

an external capacitor connected to GND.

To insure properly Reset, the ENABLE pin must be de-asserted for at least 100μS before asserted, and must be reprogrammed in I2C

programming mode. When using external capacitor, the size of the cap value depends on the power up VDD supply ramp. Larger value

results in a slower ramp-up time. Consider 0.1uF capacitor as a reasonable first estimate.

100k-Ohm

VDD

ENABLE

100k-Ohm

VDD

C

C

ENABLE

GPO

External Capacitor Controlled

GPO pin contolled from Controller IC

Figure 4-4: Reset control from External Capacitor or GPO pin