User's Manual

2.2 Signals in J1 and J2 Connector

Maximum load on all In/Out is 3mA.

J1 &

Pin nr.

Pin Name Signal Name Signal

Level

Type Description

1 VSS Ground Ground

2 VSS Ground Ground

3 VCC_5V Power 3.3V – 6V If only cB-0701-01 is used the

range 3.0V – 6.0V is allowed

4 VCC_5V Power 3.3V – 6V If only cB-0701-01 is used the

range 3.0V – 6.0V is allowed

5 RS232-CTS Clear To Send RS232 Input

6 RS232-TxD Transmit Data RS232 Output

7 RS232-RTS Request To Send RS232 Output

8 RS232-RxD Receive Data RS232 Input

9 RS232-DTR Data Terminal Ready RS232 Output

10 RS232-DSR Data Set Ready RS232 Input Also used to control the power

saving mode “stop mode”.

See chapter 2.4 for more

information.

11 RED/Mode Red LED output and

Serial interface mode

select input

CMOS In/Out The level on this pin during

power up selects RS232 (High)

or logic (Low) level UART-

communication.

The Mode pin is only valid at

startup and cannot be changed

during operation.

The Mode pin is internally

pulled up i.e. RS232 mode is

the default setting.

Recommended value of the

pull-down resistor is 10 kohm.

See section 2.5 for a design

example.

12 Switch-0 Function switch CMOS In Used for the “Connect on

external signal” function, see

the Serial Port Adapter user

manual for more information on

the Function switch.

See section 2.5 for a design

example.