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Basic_flash_memory_VSUBPP_SUB_programming_voltage_supply

2017-02-03 00:55  
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Basic_flash_memory_VSUBPP_SUB_programming_voltage_supply
This circuit provides VPP (program power) pulses for programming digital flash memories. Figure 6-48 shows the waveforms involved. Trace A is the programming command. Trace B shows a smoothly rising VPP pulse of the correct amplitude. The amplitude of VPP can be selected by the values of R1 and R2. Figure 6-48C shows a synchronous switch option for the circuit, as well as output currents available with the option.