MOD-USB-RS232 Olimex Ltd., MOD-USB-RS232 Datasheet - Page 13

• Manufacturer Part Number: MOD-USB-RS232
• Description: Interface Modules & Development Tools USB TO RS232 INTERFACE MODULE
• Manufacturer: Olimex Ltd.

Specifications of MOD-USB-RS232

• Product: Interface Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Jumpers description depending on mode:
Jumpers description for changing EEPROM firmware:
Commands for UEXT smart control mode:
MP3_RST/TXD
DREQ/RXD
UEXT/BAT
which you can save MP3 files to the SD card.
between MOD-MP3-X and your computer. For this purpose, for example, you can use our
module MOD-USB-RS232, which creates a virtual COM Port. The COM Port setting are
9600bps 8N1.
You can also use other our boards with UEXT to connect with MOD-MP3-X.
It is the list of used commands:
Note: For the latest version visit our site:
STM_RST
VLS_RST
DREQ_E
BOOT_E
Jumpers
SA_E
–
–
–
–
–
power that you will choose)
In this jumper position you can program on board EEPROM with the proper programmer
(for example PICkit2). Note that you have to make custom adapter cable between
EEPROM programmer and EEPGM connector. See EEPGM connector description below.
SA_E, BOOT_E and DREQ_E – opened
STM_RST and VLS_RST – closed
DREQ/RXD – closed in position DREQ
MP3_RST/TXD – closed in position MP3_RST
UEXT/BAT – closed in position BAT (position of this jumper depends on the source of
In this mode STM32F103RBT6 firmware has extra - Mass storage device, through
In this mode you can use RXD and TXD signals of UEXT connector to communicate
- "CDIRNAME <name>" - switch the current directory to <name>, name should be
up to 8 characters long
- "L" - lists the current directory and return its contents, directories are marked with
a <DIR> tag
Standalone mode UEXT playback mode UEXT smart control mode
MP3_RST
opened
closed
closed
closed
DREQ
closed
BAT
Page 13
www.olimex.com/dev
MP3_RST
opened
opened
opened
opened
DREQ
closed
UEXT
opened
opened
opened
opened
opened
RXD
BAT
TXD