NXP Semiconductors K22F series - Page 711

Address
Address Data
TSIZ
AA=1
AA=0
AA=1
AA=0
FB_CLK
FB_AD[Y :0]
FB_AD[31:X ]
FB_RW
FB_TS
FB_ALE
FB_CSn
FB_OEn
FB_BE/BWEn
FB_TA
FB_TSIZ[1:0]
BEM=1
BEM=0
S0 S1 S2 S3 S0
TIP
Basic Read-Bus Cycle
S0 S1 S2 S3 S0
basicRead.svg
FB_AD[31:X] indicates a 32-, 16-, 8-bit address/data bus (or custom size).
FB_AD[Y:0] indicates a 32-, 16-, 8-bit address bus (or custom size).
Figure 31-4. Basic Read-Bus Cycle
31.4.11.2
Basic Write Bus Cycle
During a write cycle, the device sends data to memory or to a peripheral device. The
following figure shows the write cycle flowchart.
Chapter 31 External Bus Interface (FlexBus)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 711