GD25Q64CFES datasheet(39/74 Pages) GIGADEVICE

부품명	GD25Q64CFES

상세설명	3.3V Uniform Sector Dual and Quad Serial Flash

PDF	74 Pages

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제조업체	GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]

홈페이지	http://www.gigadevice.com/

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39 / 74 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q64C

7.27. High Performance Mode (HPM) (A3H)

The High Performance Mode (HPM) command must be executed prior to Dual or Quad I/O commands when operating

at high frequencies (see fR and fC1 in AC Electrical Characteristics). This command allows pre-charging of internal

charge pumps so the voltages required for accessing the flash memory array are readily available. The command

sequence: CS# goes lowSending A3H command Sending 3-dummy byteCS# goes high. After the HPM

command is executed, the device will maintain a slightly higher standby current (Icc9) than standard SPI operation. The

Release from Power-Down or HPM command (ABH) can be used to return to standard SPI standby current (Icc1). In

addition, Power-Down command (B9H) will also release the device from HPM mode back to standard SPI standby state.

Figure 32. High Performance Mode Sequence Diagram

Command

A3H

CS#

SCLK

29 30 31

MSB

3 Dummy Bytes

23 22

High Performance Mode

HPM

GD25Q64CFES 데이터시트(PDF) 39 Page - GigaDevice Semiconductor (Beijing) Inc.