Data Sheet

- 6 -
3.1.4. Processor characteristics
Table 3-4.Processor characteristics
Parameter
Test Condition
Range
Unit
On-chip Flash storage space
256K/512K
bytes
On-chip RAM storage space
32K/64K
bytes
working frequency
38.4
MHz
3.1.5. Module interface features
Table 3-5.Module interface features
Parameter
Test Condition
Range
Unit
UART Maximum baud rate
230400
bps
Analog channel resolution / conversion time
Half-Duplex Mode
12/4096
Bits/µs
Analog input impedance
>1
MΩ
Analog reference voltage（VREF）
1.2
V
Analog input voltage
0 - VREF
V
I2C bus maximum clock frequency
400
KHz
GPIO output voltage (logic 0)
-8/ 4 mA
0 ~
0.18*VCC
V
GPIO output voltage (logic 1)
-8/ 4 mA
0.82*VCC ~
VCC
V
Real time clock frequency
32.768
KHz
3.2. Physical /Ambient Characteristics
Table 3-6. Physical / Environmental Characteristics
Parameter
Value
Remarks
Physical dimension
10*10*2.5mm
Weight
<1g
Working temperature
-40°C to +85°C
Working relative humidity
<95%