STOTG04E

Block description

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6.12

External charge pump switch

The ADR_PSW pin has two functions. State of this pin is always latched into a register on the rising edge

address is latched, this pin can be set as an output by setting the PSW_EN bit of the Control Register 3.

Output value of the pin can be controlled by the VBUS_DRV bit of the Control Register 2. The output is

active low when the pin is high during reset; otherwise the output is active high.

When the PSW_EN bit is set the internal charge pump is switched off.

Example connection of an external charge pump is shown in following figure. When the charge pump

control signal would be active high, the ADR_PSW pin should be pulled down instead of high.

Figure 13. External charge pump application