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7643 Datasheet(PDF) 259 Page - Renesas Technology Corp |
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7643 Datasheet(HTML) 259 Page - Renesas Technology Corp |
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259 / 424 page  Rev.2.00 Aug 28, 2006 page 138 of 202 7643 Group REJ09B0133-0200 APPLICATION 2.6 USB Fig. 2.6.33 Control procedure (USB endpoint 1 OUT interrupt routine) USBINDEX 0116 (Address : 5816) USB endpoint 1 OUT interrupt routine • Check of OUT_PKT_RDY flag. • Endpoint 1 OUT_CSR (Address : 5A16),bit0? 0 1 WRT_CNT (RAM_CNT) (Address : 5D16) • Push number of receive data to RAM_CNT (1 byte) • RAM_CNT: User defined RAM OUT_PKT_RDY flag cleared RTS USBFIFO1 (RAM_DATA) (Address : 6116) • Reading data from number of receive data (RAM_CNT) FIFO • RAM_DATA: User defined RAM Definition of RAM_DATA according to the required number of bytes. (RAM_CNT)=“0”? (RAM_CNT) – 1 N Y CLT (Note 1) CLD (Note 2) Push registers to stack Notes 1: This is executed when index X mode flag is used. 2: This is executed when decimal mode flag is used. • Push registers used in the interrupt routine Pop registers |
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