Hardware Reference Manual
SOM
Version 1.0
- 47 -
eInfochips Confidential
6.3.13
RTC
For Time and Date update, ERAGON624 has a support to connect external rechargeable Coin Cell
battery on connector J8 at Carrier card.
CVe terminal of battery to J8.1 pin and GND to J8.2 pin.
Figure 20 – RTC connector (J8)
6.3.14
Debug Port
ERAGON624 support a debug Port to capture the system logs. Carrier card has on board UART to USB
converter chip FT230XQ-R (U55). It converts BLSP2 UART signals routed from SOM to carrier through
B2B connectors to USB high-speed signals.
Therefore, to capture the logs, user only need to connect Micro USB cable to connector J22 on carrier
card.
Figure 21 – Debug Port connection (J22)
Pinout specification of J22 mentioned below,
Pin Number
Net Name
Pin Function
J22.1
VBUS_5V
USB 5V Supply
J22.2
USB_DEBUG_DM
USB Data Negative
J22.3
USB_DEBUG_DP
USB Data Positive
J22.4
NC
Not Connected
J22.5
GND
Ground
Table 13:
Debug Port Connector (J22) Pinout
Summary of Contents for Eragon 624 SOM
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