Denso BHT-300B - Functions of the CU-300

5.1 Functions of the CU-300
The optical communication unit CU-300 series is available in three models: CU-301, CU-321 and
CU-311. The CU-300 series has the following functions:
(1) Data exchange function
The CU-300 exchanges data and programs between the BHT and the host PC.
It interfaces with the BHT via the IrDA interface and with the host PC via the RS-232C interface
(CU-301), USB interface (CU-321) or Ethernet 10Base-T interface (CU-311).
(2) Battery cartridge charging function
The CU-300 charges the lithium-ion battery cartridge loaded in the BHT.
NOTE: Before using the CU-321, you need to install the dedicated USB device driver stored in the
CD-ROM that comes with the CU-321. For the installation/uninstallation procedure, refer to the
guidebook that comes with the CU-321.
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