GD25Q80 Datasheet, PDF (31/49 Pages) ELM Electronics – 3.3V Uniform Sector Dual and Quad Serial Flash

GD25Q80CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
http://www.elm-tech.com
Figure 28. Read Identification ID Sequence Diagram
7.24. 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. See Figure29. 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 29. High Performance Mode Sequence Diagram
CS#
SCLK
SI
SO
0123456789
29 30 31
Command
A3H
3 Dummy Bytes
23 22
MSB
210
t _HPM
High Performance Mode
49 - 31
Rev.1.0