DAC02

Revision 1.11

Page

of 2

Jan. 2011

2

below shows the difference among modules.

SET-A/EN

SET-B/SET

Module Type

LO

LO/HI

DRF1212D10

LO

HI

DRF4432D20

HI

HI

DRF7020D series, DRF7020M series

Table 2

Level Controls in Normal Communication Mode

1)

For DRF1212 modules, the 3

mode, the SET-A must be low and SET-B can be low/high (Normal mode/Wake-up mode). The USB

converter board uses IC CP2102 from Silicon labs and its RTS pin is corresponding to SET-A pin of

DRF1212 module. In order to test communication between modules successfully, users should

choose serial port software which provides RTS option and keep RTS selected so that the SET-A pin

is pull down and the DRF1212 modules will work in wake-up mode.

2)

For DRF4432 modules, the 3

The 7

data or else it outputs field strength value. For the same reason, DRF4432 modules must be tested by

serial port software with RTS option.

3)

As to DRF7020D/7020M series, the 3

high. The 7

modules can work correctly when tested under common serial port software.

Dorji Applied Technologies

Add.: Xinchenhuayuan 2, Dalangnanlu, Longhua,

Baoan district, Shenzhen, China 518109

Tel:

0086-755-28156122

Fax.:

0086-755-28156133

Email:

sales@dorji.com

Web:

http://www.dorji.com

Dorji Industrial Group Co., Ltd reserves the right to

make corrections, modifications, improvements and

other changes to its products and services at any time

and to discontinue any product or service without

notice. Customers are expected to visit websites for

getting newest product information before placing

orders.

These products are not designed for use in life support

appliances,

devices

or

other

products

where

malfunction of these products might result in personal

injury. Customers using these products in such

applications do so at their own risk and agree to fully

indemnify Dorji Industrial Group for any damages

resulting from improper use.