ADLINK Technology Q7-BT, Technical Reference

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Utilities 41
Q7-BT
Exception Blink Codes
In the case of an error, the BMC shows a blink code on the STATUS-LED (LED1). This error
code is also reported by the BMC Flags register. The Exception Code is not stored in the Flash
storage and is cleared when the power is removed. Therefore, the “Clear Exception Code”-
Command is not supported.
BMC Flags
The BMC Flags register returns the last detected exception code since power up.
4.3 Watchdog Timer
The Q7-BT features three separate Watchdog Timers. One of them is integrated in the SoC and
two are provided by the BMC (managed by the SEMA).
The SoC Watchdog can be configured in the BIOS or by programming the Watchdog registers.
If this function is used by user application, the application has to provide all logging functionality
if desired.
The BMC Watchdog activations are caused by under voltage protection. The Watchdog LED
flashes after restart but only if the power supply reaches 4.2V.
4.4 Temperature Sensors
The Q7-BT provides three temperature sensors. One is offered from the SoC, one from the
BMC (managed by the SEMA), and one from a dedicated chip on the board.
The SoC temperature sensor can be configured by programming the appropriate registers. This
is usually done with a user application.
4.5 Programming Examples
Programming examples can be provided based on a Linux operating system, upon request.
Table 4-2: Blink Codes
Exception Blink
Code
Error Message
0 NOERROR
2 NO_SUSCLK
3 NO_POWERUP
4 NO_SLP_S4
5 NO_SLP_S3
6 BIOS_FAIL
7 RESET_FAIL
8 POWER_FAIL
9 NO_PWGIN
10 BMC_VCC_S
11 BMC_VNN_S
12 BMC_V1P0A
13 BMC_VDDQ
14 BMC_V1P8A
18 LOW_VIN
19 RESETIN_FAIL
20 THERMTRIP_ACTIVE