ETAS XETK-S21.0B, User Manual

Page: 22 / 68

XETK-S21.0B - User’s Guide 22
Hardware Description ETAS
2. The XETK-S21.0 monitors the VDDSBRAMsense pin, provided by the ECU
connection. The microcontroller’s standby power supply pin must be con-
nected to the XETK pin VDDSBRAMsense. The microntroller’s standby
power supply may be provided by the ECU or by the XETK.
4.7 Status LEDs
There are three LEDs displaying the operating status of the XETK-S21.0 (Fig. 4-6
on page 22).
Fig. 4-6 Status LEDs of the XETK-S21.0
LED State Definition
Red On XETK-S21.0 is supplied with power and active (i.e. the ECU
is switched on or the 100 Mbit/s link to the calibration sys-
tem is established)
Green Off Working page may be different from reference page. Cali-
bration and development system has downloaded data
since the last power failure. Switching between the Refer-
ence Page and Working Page is possible.
On Power supply has dropped under selected threshold:

- data retention of the calibration data manager in the ECU
is no longer ensured

- as soon as the XETK-S21.0 switches on again, the ECU
switches to the Reference Page.

Green LED stays on until the calibration and development
system downloads data into the calibration data memory.
Otherwise switching to the Working Page is not possible.
Yellow Flashing Communication active
On
100 Mbit/s link to calibration system established