GD25VQ16CSFG datasheet(31/59 Pages) GIGADEVICE

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Uniform Sector

Dual and Quad Serial Flash

GD25VQ16C

Figure 27. Read Identification ID Sequence Diagram

7.23.

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 fC2 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. See Figure28.

After the HPM command is executed, the device will maintain a slightly higher standby current (Icc8) 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 28. High Performance Mode Sequence Diagram

CS#

SCLK

9 10

MSB

18 19 20 21

22 23

26 27 28 29

30 31

Capacity

JDID7-JDID0

CS#

SCLK

MSB

Memory Type

JDID15-JDID8

11 12 13 14 15

9FH

Manufacturer ID

MSB

Command

A3H

CS#

SCLK

29 30 31

MSB

3 Dummy Bytes

23 22

High Performance Mode

HPM

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