M25PX32 데이터 시트보기 (PDF) - STMicroelectronics

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M25PX32

Serial Flash Memory

STMicroelectronics 

Signal descriptions

M25PX32

2.6

Write Protect/Enhanced Program supply voltage (W/VPP)

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

voltage range applied to the pin.

If the W/VPP input is kept in a low voltage range (0 V to VCC) the pin is seen as a control

input. This input signal is used to freeze the size of the area of memory that is protected

against program or erase instructions (as specified by the values in the BP2, BP1 and BP0

bits of the Status Register. See Table 9).

If VPP is in the range of VPPH (as defined in Table 14) it acts as an additional power supply

during the Bulk Erase cycle. In this case VPP must be stable until the Bulk Erase algorithm is

completed.

2.7

VCC supply voltage

VCC is the supply voltage.

2.8

VSS ground

VSS is the reference for the VCC supply voltage.

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