![NXP Semiconductors TWR-K21F120M Quick Start Manual Download Page 4](http://html.mh-extra.com/html/nxp-semiconductors/twr-k21f120m/twr-k21f120m_quick-start-manual_1721904004.webp)
Quick Start Guide
4
DIP SWITCH CONFIGURATION AND RESET BUTTONS
Table 1 shows the jumper configuration to boot the Quick Start board from the
microSD slot.
Table 1: Boot Configuration DIP Switch Settings
SW1
DIP#
8
7
6
5
4
3
2
1
BOOT_
CFG1_
[6]
BOOT_
CFG1_
[5]
BOOT_
CFG1_
[4]
BOOT_
CFG2_
[4]
BOOT_
CFG2_
[3]
BOOT_
CFG3_
[5]
BOOT_
CFG3_
[4]
BOOT_
MODE1
SPI NOR
0
1
1
x
x
DDR Memory
Map default
config
0 =
Boot
from
Fuses
SD/ESD
1
0
x
0 =
SD2
1 =
SD2
‘00’ – Single DDR
Channel
‘01’ – Fixed 2 x
32 map
1 =
Boot
from
Board
settings
1 =
SD3
0 =
SD3
‘10’ – 4 KB
Interleaving
Enabled
'11' – Illegal
DEFAULT
1
0
0
1
0
1
0
1