R01UH0822EJ0100 Rev.1.00
Page 977 of 1041
Jul 31, 2019
RX13T Group
31. Flash Memory (FLASH)
31.11.3
Procedure to Select the Device and Change the Bit Rate
Procedure to select the device to connect with the serial programmer and to change the bit rate for communication is as
follows.
(1) Send the device select command (10h). Select the device code according to the endian of developed software.
(2) Send the operating frequency select command (3Fh) to change the communication bit rate from 9,600 or 19,200
bps.
Figure 31.30
Procedure to Select the Device and Change the Bit Rate
10h (device select command)
MCU
46h (ACK)
90h, XXh (error code)
3Fh (operating frequency select command)
06h (ACK)
BFh, XXh (error code)
Wait for 1-bit period
at the old bit rate
Set the new bit rate
06h (communication confirmation data)
06h (ACK)
(1)
(2)
Serial
programmer