PXD20RM Datasheet, PDF (1245/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Table 35-29. Serial Flash Device Half Byte Ordering
Serial Flash
Device Byte #
0
1
2
3
4
5
6
7
8
Flash A
Bit Position
[7:4]
[3:0]
fah0
fal0
fah1
fal1
fah2
fal2
fah3
fal3
fah4
fal4
fah5
fal5
fah6
fal6
fah7
fal7
fah8
fal8
Flash B
Bit Position
[7:4]
[3:0]
fbh0
fbl0
fbh1
fbl1
fbh2
fbl2
fbh3
fbl3
fbh4
fbl4
fbh5
fbl5
fbh6
fbl6
fbh7
fbl7
fbh8
fbl8
The table entry naming reflects the half byte positioning in the serial flash devices:
• <fa>h0 means Flash A, <fb>h0 means Flash B.
• fa<h>0 means half byte in high position, fa<l>o means half byte in low position.
• fah<0> means physical byte address 0 in the serial flash device, fal<1> means physical byte
address 1 in the serial flash device.
Table 35-30. Byte Ordering in Parallel Flash Mode - RX Buffer
QSPI_SFAR[SFADR] set to 0x000_0000
QSPI_RBDR0
QSPI_ARDB0
fah0 fbh0 fal0 fbl0 fah1 fbh1 fal1 fbl1
QSPI_RBDR1
QSPI_ARDB1
fah2 fbh2 fal2 fbl2 fah3 fbh3 fal3 fbl3
QSPI_SFAR[SFADR] set to 0x000_0001
QSPI_RBDR0
QSPI_ARDB0
fah1 fbh1 fal1 fbl1 fah2 fbh2 fal2 fbl2
QSPI_RBDR1
QSPI_ARDB1
fah3 fbh3 fal3 fbl3 fah4 fbh4 fal4 fbl4
NOTE
For IP Commands the read size can be given in number of bytes. If this
number is not a multiple of 4 the last buffer entry is not completely filled
with the missing higher numbered bytes at undefined values.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
35-35