PCM-061/phyCORE-i.MX7 System on Module
L-821e_2
© PHYTEC America L.L.C. 2017
33
6.3
Boot Device Configuration
Table 10
shows the default boot configuration selected by the phyCORE-i.MX7 default boot strapping. For detailed
information regarding all supported boot device configurations, please refer to the NXP i.MX7 Technical Reference
Manual.
Table 10. SD/MMC Boot Configuration Description
5
BOOT_CFG Latching Signal
Definition
Setting
X_LCD1_DATA[15:12]_BOOT[15:12] Boot Device Selection
0001
–
SD/eSD/SDXC
0010
–
MMC/eMMC
X_LCD1_DATA[11:10]_BOOT[11:10] SD Port Selection
00
–
USDHC-1
01
–
USDHC-2
10
–
USDHC-3
X_LCD1_DATA[9]_BOOT[9]
SD Power Cycle Enable
0
–
Disabled
1
–
Enabled
X_LCD1_DATA[8]_BOOT[8]
Loopback Clock Selection
0
–
Through SD Pad
1
–
Direct
X_LCD1_DATA[7]_BOOT[7]
Fast Boot Support
0
–
Normal Boot
1
–
Fast Boot
X_LCD1_DATA[6:4]_BOOT[6:4]
Bus Width
0
–
1-bit
1
–
4-bit
X_LCD1_DATA[3:1]_BOOT[3:1]
Speed
000
–
Normal
001
–
High
010
–
SDR50
001
–
SDR104
X_LCD1_DATA[0]_BOOT[0]
USDHC2 IO Voltage
0
–
3.3V
1
–
1.8V