User Manual

M210-2G - DATASHEET - M210-2G
DS - 13
Version 1.1
Serial Interface
This interface allows a serial connection to the host via three wires :
Configuration RST TX RX
RS-232 CMOS RST TX RX
ISO 7816 T=0 RST I/O I/O
RST resets the coupler microprocessor when tied to the ground.
Character Format
Data Rate 9600 baud (default value)
Parity Even
Number of bits 8
Transmission Mode LSB first
Stop bits 2
Flow control none
Note : If user’s UART cannot manage 2 stop bits, it is possible to communicate with our
coupler using only one stop bit.
8 bits
SelectCard command frame
Baud rate
The default data rate is set at 9600 baud, but this can be changed by software to select
higher data rates :
! 9600
! 19600
! 38400
! 57600
! 115200
Noise
If a RS232 driver is used, it may induce noise on the power supply line, and a PI filter
should be added. More over, noise induced by this kind of device is around 400kHz, which
is the frequency used by the 15 693 protocol. To avoid any problem on our coupler (noise
emission), or on any other device connected to the power supply line, a PI filter should be
added also on the power supply line of the RS 232 driver, as close as possible to this
component.