12
Chapter 4 Interfaces
Interface Definition
The interface of EM2037 consists of 12 PIN-FPC and Micro USB:
12 PIN-FPC can either be TTL232 or USB form.
Note: One product model supports either TTL-232 or USB form.
Micro USB can only be used as standard USB interface.
The location of 12 PIN-FPC connector and Micro USB connector are marked in below illustation.
For detailed signal definition of 12 PIN-FPC, please refer to the following sections about TTL232 and
USB interfaces.
Figure 4-1
TTL-232
When 12 PIN-FPC is set for TTL232 interface, the definitions for 12 PINs are as below:
PIN#
Signal
I/O
Description
1
Reserved
-
Reserved
2
VIN
-
Power-supply voltage input
3
GND
-
Power-supply and signal ground
4
RXD
I
Input-TTL level 232 receive data
