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7000 Bus Converter User Manual (version 1.2,Feb/2003, 7PH-006-10) --------------- 82
7.3 Changing Baud Rate
Wire connection: Refer to Sec. 2.7
Test program: Refer to “NAP7000S User Manual” for TEST.EXE
The steps to change the baud rate of communication are given as follows.
1. Wire connection, power on and run test.exe
2. Press 2
3. Press $012[Enter] Receive=! 01080600
4. Press 2
5. Press %0101080A00[Enter] Receive=? 01
6. Connect INIT*_pin (pin 6) to GND_pin (pin_10)
7. Press 2
8. Press %0101080A00[Enter] Receive=! 01
9. Press 2
10. Press $012[Enter] Receive=! 01080A00
11. Power off, disconnect INIT*_pin and
GND_pin, power on and run test.exe
12. Press 0
13. Press 1[Enter](1/2/3/4 for COM 1/2/3/4)
14. Press 115200[Enter]
15. Press 0[Enter]
16. Press 2
17. Press $012[Enter] Receive=! 01080A00
• Step 3: read the module status, baud rate=9600
• Step 5: change baud rate with the INIT*_pin floating and the function will fail
failure. If the user want to change the baud rate of the 7000 module, the
INIT*_pin must be connected to the GND_Pin. If the INIT*_pin is left floating
(unconnected), the 7000 module will echo ?AA to the user.
• Step 8: change baud rate to 115200 with the INIT*_pin connected to the
GND_Pin. After this command, the baud rate will remain at 9600. The baud
rate of the 7000 series will be changed only during the power-on interval.
• Step 10: read the module status, baud rate= 115200(this value, is stored in
the EEPROM only). The baud rate is changed in step 8 but the baud rate of
this module is still at 9600 BPS. When the module has powered-off-and-
powered-on, the baud rate will be changed to 115200.
• Step 11: power off, then power on. The module will change its baud rate
based on the EEPROM value only when the module has first powered-on
• Step 13-16: change TEST.EXE to baud rate 115200
• Step 17: use baud rate 115200 to read back the module status and find that
the module is now communicating at baud rate 115200.
NOTE:
(1) To change the baud rate, the
INIT*-pin must be connected to
GND-pin
(2) The baud rate will be saved into
EEPROM immediately.
(3) The module will change its baud
rate only during the first power-
on time.