Renesas CPU Board M3A-HS19 Uživatelský manuál stáhnout pdf (Strana 25)

SH7285/SH7286 USB Function Module

USB to Serial Conversion Application Note

3.2 Operation Flowchart

The sample program enters the main loop after initial settings are completed.

When the sample program receives a data packet from the serial device in serial IN communication, it stores the

received packet in the bulk IN transfer RAM. The stored data is transmitted to the USB host in a bulk IN transfer. For

details on bulk IN transfer, refer to

2.5.2 Bulk IN Transfer. For details on serial IN communication, refer to 3.3.2

Serial IN Communication.

When the sample program receives a data packet from the USB host in a bulk OUT transfer, it stores the received data

packet in the bulk OUT transfer RAM. The stored data is transmitted to the serial device in the serial OUT

communication. For details on the bulk OUT transfer, refer to

2.5.1 Bulk OUT Transfer. For details on serial OUT

communication, refer to

3.3.1 Serial OUT Communication.

Figure 3.5 shows an Operation Flowchart and Figure 3.6 shows the Data Flow.

Figure 3.5 Operation Flowchart

REJ05B1152-0100/Rev.1.00 May 2008 Page 25 of 35

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Renesas CPU Board M3A-HS19 Uživatelský manuál Strana 25