Functional description

STA2416

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Vdd supply voltage (vddf)

Vdd provides the power supply to the internal core of the flash memory device. It is the main

power supply for all operations (Read, Program and Erase)

Vddq supply voltage (vddq)

Vddq provides the power supply to the I/O pins and enables all Outputs to be powered

independently from Vddf. Vddq can be tied to Vddf or can use separate supply.

Vpp program supply voltage (vpp)

Vpp is both a control input and a power supply pin. The two functions are selected by the

voltage range applied to the pin. The supply voltage Vddf and the program supply voltage

Vpp can be applied in any order.

If Vpp is kept in a low voltage range (0 V to 3.6 V) Vpp is seen as a control input. In this case

a voltage lower than 1 V gives protection agains program or block erase, while

1.65 V < Vpp < 3.6 V enables these functions. Vpp is only sampled at the beginning of a

program or block erase; a change in its value after the operation has started does not have

any effect and program or erase operations continue.

If Vpp is in the range 11.4 V to 12.6 V it acts as a power supply pin. In this condition Vpp

must be stable until the Program/Erase algorithm is completed.

Vssf Flash ground (vssf)

Vssf is the reference for all voltage measurements.

Address inputs (Addr0-Addr17), data input/output (Data0-Data15), chip

enable (csn0), output enable (rdn/ng), write enable (wrn)

These are connected to and controlled by the Bluetooth™ baseband controller.