PXD20RM Datasheet, PDF (1215/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

35.2.2.6 IOFA[3:0] - Data IO Flash B
These signals are the data I/O lines to/from the serial flash device B. Refer to Section 35.2.3, Driving of
External Signals, for details about the signal drive and timing behavior. Note that the signal pins of the
serial flash device may change their function according to the SFM Command executed, leaving them as
control inputs when Single and Dual Instructions are executed. The QuadSPI module drives these signals
high During the execution of Single and Dual Instructions.
35.2.3 Driving of External Signals
The different phases of serial flash access scheme are shown in Figure 35-2 below:
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
35-5