VN-200 User Manual
UM004
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2.1.1
VN-200 SMD Power Supply
The minimum operating supply voltage is 3.2 V and the absolute maximum is 5.5 V.
2.1.2
VN-200 SMD Serial (UART) Interface
The serial interface on the VN-200 operates with 3 V TTL logic.
Table 2 - 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-200 SMD Serial Peripheral Interface (SPI)
Table 3 - 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-200 SMD Reset, SyncIn/Out, and Other General I/O Pins
Table 4 - 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
Table 5 - 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
Input Frequency
200 Hz
200 Hz
1 kHz
Pulse Width
500 μs
Table 6 - 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
