IFC
Controller
IFC_AD[15:0]
C29x
IFC_ADDR[26:4]
IFC_ADDR[3]
IFC_ADDR[2]
IFC_WE_B
IFC_OE_B
FBANK_SEL2
SW5[8]
NOR_CS_B
CE
NOR
Flash 16-Bit
DQ[0:15]
A[0:22]
A[23`]
A[24]
WE_B
OE_B
U10
SN74LVC1G86DBVR
FBANK_SEL1
SW5[7]
5
4
3
1
2
10
11
VCC
O
GND
U42
5
4
3
1
2
10
11
VCC
O
GND
SN74LVC1G86DBVR
Figure 4-2. NOR flash memory
NOTE
In the above figure, NOR_CS can be either CS0 or CS1
depending on the boot location. It is set using SW5[6].
The NOR flash memory is divided into four memory banks with 16 MB size each. The
DIP switch, SW5[7:8], can be used to change the starting address for the memory banks.
Four different u-boot images can be programmed into each memory bank. When
selecting NOR flash as boot flash (CS0 is connected to NOR flash by setting SW5[6] to
ON, rom_location is set to 1111 using SW5[1:4]), different u-boot images can be selected
to boot up the board, by setting SW5[7:8].
4.2.2 NAND Flash Memory
The C29x PCIe provides NAND flash memory of 4 GB with 8-bit port size. The figure
below shows the hardware connectivity between the C29x PCIe card and NAND flash
memory.
Chapter 4 On-Board Resources
C29x PCIe Card User Guide, Rev. 0, 10/2013
Freescale Semiconductor, Inc.
25
Содержание C29x
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