TDK blu2i 用户手册

 
The module is capable of operating at a very wide range of baud rates 
and S Registers 520 and 521 allow the baud rate to be set very easily. 
The baud rate clock generator in the module is more versatile that that 
available in a standard 16550 UART commonly available in PCs. 
 
In fact, as long as the equation BAUDRATE * 0.004096 produces an 
integer value, then there will be 0% error in clocking for that baud rate. 
 
So it is possible to set a baud rate that a PC cannot cope with, and in 
that circumstance it is virtually impossible to communicate with it. 
 
To cater for this circumstance, the blu

2i

 module will come out of reset 

using 9600,N,8,1 comms settings for exactly 750 milliseconds and then 
revert to the comms parameters as per the S Registers. 
 
If the host sends the string !<BISM>!<cr> where <cr> is the carriage 
return character within that 750ms period, then the module will remain at 
9600,N,8,1 and will also configure itself using factory default S Register 
values. 
 
Please see the next section for a discussion on Terminal Emulators and 
how you can obtain a terminal emulator which has this ‘reset’ feature 
built in. 

 
The Bluetooth Module described in this document uses the serial 
interface to accept commands and provide responses. While in 
command mode all interaction between it and a host is done purely in 
text mode. This means that virtually all terminal emulators available are 
adequate for testing and prototyping. HyperTerminal, Procomm or the 
TDK Terminal application supplied are all suitable terminal emulators. 
 
TDK Terminal is a terminal emulation application capable of running on 
Windows 98, Me, 2000 and XP operating systems. It was developed 
specifically to aid development and testing of the blu

2i

 Module. It allows 

connection to serial devices using any combination of the following 
communications parameters: 
 
COM Port:  1 to 255 

32 of 36