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FIBOCOM SU806 Series Hardware Guide
Page 28 of 79
enter sleep mode. When module in sleep mode, pull down KEY_PWR_ON pin 0.1s~0.5s and then
release it, module can be waked up.
3.2.2
Reset
Support one key (KEY_PWR_ON) reset and two key (KEY_PWR_ON & KEY_RESIN_N) reset; and two
key reset mode is default.
One key (KEY_PWR_ON) reset: when module in operating mode, pull down KEY_PWR_ON pin 0.6s~6s,
user interface will display selection box (select power off or restart); pull down KEY_PWR_ON pin 7s~10s
module will be forced reset. The reset timing is shown as follows:
7s
≤
t
≤
10s
KEY_PWR_N
DCDCGEN1V85
V B A T
7s
Figure 3-7 Force reset timing
Two key (KEY_PWR_ON & KEY_RESIN_N) reset: when module in operating mode, pull down
KEY_PWR_ON and KEY_RESIN_N pin 7s~10s at the same time, module will be forced reset. The reset
reference circuit please refer to power on circuit design.
3.2.3
Volume Control
KEY_VOL_UP and KEY_VOL_DOWN is the volume up and volume down control; its circuit design can
refer to the power on keypad circuit.
3.3
USB
The SU806 series module supports one USB 2.0 interface; USB2.0 supports HS (480Mbps) modes and
compatible USB1.1 FS (12Mbps). Supports USB OTG (additional 5V power supply is required), and does
not support HUB expansion when serving as USB master device. Its pin definition is shown in the
following table: