Smart Module Series
SA800U-WF_EVB_User_Guide 50 / 63
4.16. Sensors
SA800U-WF EVB provides three sensors for testing purpose, as shown in the figure below:
Table 20: Sensors
U1301
U1302
U1303
Figure 52: Sensors
4.17. Emergency Download Interface
SA800U-WF EVB provides one emergency download switch USB_BOOT to force the module enter
download mode. Turn on S1214(Pull up USB_BOOT to 1.8 V) before turning on the module to use this
function.
The following figure shows a reference circuit design for the emergency download interface:
VREG_S4A_1V8
S1214
MODULE
USB_BOOT
R1
10K
Figure 53: Reference Design for Emergency Download Interface
RefDes.
Description
U1301
Ambient light sensor and proximity sensor
U1302
Accelerometer and gyroscope sensor
U1303
Geomagnetic sensor