UM001
11
2.1.1
VN-100 SMD Power Supply
The minimum operating supply voltage is 3.2V and the absolute maximum is 5.5V.
2.1.2
VN-100 SMD Serial (UART) Interface
The serial interface on the VN-100 operates with 3V TTL logic.
Serial I/O Specifications
Specification
Min
Typical
Max
Input low level voltage
-0.5 V
0.8 V
Input high level voltage
2 V
5.5 V
Output low voltage
0 V
0.4 V
Output high voltage
2.4 V
3.0 V
2.1.3
VN-100 SMD Serial Peripheral Interface (SPI)
Serial I/O Specifications
Specification
Min
Typical
Max
Input low level voltage
-0.5 V
0.8 V
Input high level voltage
2 V
5.5 V
Output low voltage
0 V
0.4 V
Output high voltage
2.4 V
3.0 V
Clock Frequency
8 MHz
16 MHz
Close Rise/Fall Time
8 ns
2.1.4
VN-100 SMD Reset, SyncIn/Out, and Other General I/O Pins
NRST Specifications
Specification
Min
Typical
Max
Input low level voltage
-0.5 V
0.8 V
Input high level voltage
2 V
5.5 V
Weak pull-up equivalent resistor
30 kΩ
40 kΩ
50 kΩ
NRST pulse width
20 μs
SyncIn Specifications
Specification
Min
Typical
Max
Input low level voltage
-0.5 V
0.8 V
Input high level voltage
2 V
5.5 V
Pulse Width
100 ns
SyncOut Specifications
Specification
Min
Typical
Max
Output low voltage
0 V
0.4 V
Output high voltage
2.4 V
3.0 V
Output high to low fall time
125 ns
Output low to high rise time
125 ns
Output Frequency
1 Hz
1 kHz
