Instruction manual

Renesas USB MCU and USB ASSP USB Basic Host and Peripheral firmware
R01AN0512EJ0210 Rev.2.10 Page 152 of 157
Apr 1, 2013
Table11-3 R8A66597/R8A66593 DMA Setting Specification
Setting Description
DMA transfer signal selection (DFORM) Uses DACKx_N signal only (CPU bus)
Figure 11-1 EXDMA Transfe Block Diagram
11.1.2 Notification of Transfer Result
When DTC access is used as well, USB-BASIC-FW uses the registered call-back function(this function is specified by
R_usb_hstd_TransferStart/R_usb_pstd_TransferStart) to notify PDCD/HDCD of the data transfer end condition.
USB-BASIC-FW can send the following seven communication result notifications to PDCD/HDCD.
Transfer Result is set to the member “status ” of USB_UTR_t structure.
The following shows Transfer Result
USB_DATA_NONE : Data transmit normal end
USB_DATA_OK : Data receive normal end
USB_DATA_SHT : Data receive normal end with less than specified data length
USB_DATA_OVR : Receive data size exceeded
USB_DATA_ERR : 1. No-response condition or over/underrun error detected
2. Specify other than 0x08000000 – 0x0A000000 to the transfer address when
using EXDMA.
USB_DATA_STALL : STALL response or MaxPacketSize error detected
USB_DATA_STOP : Data transfer forced end