User's Manual

# Signal name Type I/O Domain Descriptions
28 GND GND GND Ground
29 VDDIO_GPIO1 P P
IO power supply.
+1.71 ～ +3.46V
30 GND GND GND Ground
31 GND GND GND Ground
32 RESERVED DI DI Un-used signal. Keep Open.
33 RESERVED OD OD
Un-used signal (Debug port). Connected to a test pad.
Keep Open if the debug function is not used.
EXPGND Exposed Ground GND GND Exposed Ground pads
NOTE1
The Type DI signals which are directed “Keep Open” in case unused, these signals can be Open
because the software in the chip does not concern about these signals.
2.3. Signal definitions
Symbols Descriptions
AI Analog input
AO Analog output
B CMOS bidirectional digital signal
DI CMOS digital input
OD Open drain digital output
P Voltage supply
GND Ground
NA Not applicable