4000S, can the internal 1.8V regulator (VCCD) be used for external io?

[DaEr_349131]

Hi,

• Is it possible to run power mode 1 (powering the psoc with a 4-5V supply), and get the IO voltages to be 1.8V
• How much current can VCCD provide (assuming we use this 1.8V tap to power some low-current peripheral IC's)

From the datasheet below:

Mode 1: 1.8 V to 5.5 V External Supply

In this mode, the PSoC 4000S is powered by an external power supply that can be anywhere in the range of 1.8 to 5.5 V.

[AchimE_41]

No, this is not supported.

Achim

[DaEr_349131]

how about the io voltage, will that be 1.8V or 1:1 with the supplied rail, ie 3.6-4.2v running off a lipo battery!?

[AchimE_41 · Accepted solution]

Hi,

The IO voltage is derived from VDDD.

Achim