Hardware Reference Manual
SOM
Version 1.0
- 35 -
eInfochips Confidential
Figure 5 – Boot Configuration Switch (SW1)
6.3.3
General Purpose Keys (as per Eragon624 Carrier Board)
There are three general-purpose keys provided on carrier card. Their applications are as below,
SW6 (Power ON/Sleep mode switch): After power ON the board, this key need to be press for
2-3 seconds to boot SOM module. Also if board goes in the sleep mode, then by pressing SW6
we can get board out of sleep mode.
SW5 (Volume up): This key is pressed to up the volume of media.
SW4 (Fast boot switch or Volume down): This switch is pressed to get processor into Fast boot
mode or to reduce the volume of media.
Figure 6 – General Purpose Keys
6.3.4
USB Interface
APQ8053 supports one USB2.0 high speed and one USB3.0 Super speed Port that comes to Carrier card
through B2B connector. USB3.0 can be further used for ADB/OTG mode for debug purpose.
USB signals can further be used for Gigabit Ethernet (By using USB to Ethernet converter) for USB pen-
drives or OTG purpose.
6.3.5
Audio Interface
ERAGON624 SOM can support PMIC’s internal codec. On the carrier Board, WCD9335 daughter board
(eI PN# 17_00348_01) can be connected by Placing connector PN# DF40HC(3.0)-30DS-0.4V(51). This
daughter board also has WSA8810 audio amplifier interfaced with codec.
Power on switch
Volume Up Switch
Fast Boot
Switch/VOL_DOWN
Switch
Summary of Contents for Eragon 624 SOM
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