27
1. In the diagram above, it takes about 1s to initialize the engine. Operate the engine via the host 1.3s later after the
engine is powered on.
2. Before powering off the engine, ensure that data transmission via its communication interface(s) is complete to prevent
transmission errors.
3. Before the EXT_VCC is powered on, ensure that other signals remain low to prevent current from flowing backwards
to affect the performance of the engine.
Serial Communication Waveform
Figure 4-10
USB Communication Waveform
Figure 4-11
Summary of Contents for EM20-85
Page 1: ...SCANNING MADE SIMPLE EM20 85 OEM scan engine integration guide...
Page 4: ......
Page 26: ...20 Cable for 8 pin Box Connector RS 232 interface Figure 3 6...
Page 30: ...24 Standby Current Figure 4 5 Peak Current VDD 5 0V with NFC Figure 4 6...
Page 31: ...25 Working Current Figure 4 7 Standby Current Figure 4 8...
