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Table 2-9. POR configuration through switches
(continued)
Switch
Signal name
Pin name
Signal meaning
Setting
1: IFC drives logic 0 for TE
assertion
SW2[3]
cfg_pll_config_sel
_b
IFC_A18
Reserved
Reserved
SW2[4]
cfg_por_ainit
IFC_A19
Reserved
Reserved
SW2[5:6]
cfg_svr[0:1]
IFC_A[16:17]
Reserved
Reserved
SW2[7]
cfg_dram_type
IFC_A21
DRAM type selection
1: DDR3L(1.35V)
SW2[8]
cfg_rsp_dis
IFC_AVD
Reserved
Reserved
SW3[1]
cfg_eng_use0
IFC_WE0
Sys_clock selection
1: Single sys_clk is selected
SW3[2:3]
cfg_eng_use[1:2]
Reserved
Reserved
-
SW3[4]
BOOT_FLASH_S
EL
-
Boot flash selection
SW3[4] = 0 for NOR boot
SW3[4] = 1 for NAND boot
SW3[5:7]
CFG_VBANK[0:2] -
NOR flash bank select
000: bank0
100: bank4
SW3[8]
TEST_SEL_N
TEST_SEL_B
-
1:T2080
1. For SW3[4]: BOOT_FLASH_SEL, it can act as boot flash selection, when BOOT_FLASH_SEL=1, NOR flash is boot flash
or NAND flash is boot flash.
2. SW3[5:7] can be used to change the staring address for the memory banks. The NOR flash memory is divided into eight
memory banks with 16 MB size each. Eight different U-Boot image can be programmed into each memory bank. When
NOR flash is selected as boot flash (CS0 is connected to NOR flash by setting SW3[4] to ON, RCW[0:8] is set to
0_0111_xxxx using SW1[1:8] and SW2[1]), different U-Boot image can be selected to boot up the board, by setting
SW3[5:7].
Chapter 2 Architecture
QorIQ T2080 Reference Design Board (T2080RDB-PC) User Guide, Rev. 0, 04/2016
Freescale Semiconductor, Inc.
35
Содержание T2080RDB-PC
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