78 8.3 Operation Guide
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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2）UART1 DMA Mode Operation Flow:
1. Set IO in the correct direction.
2. Configure UARTDIV and UART1BAUD to choose sample rate and baud.
3. Configure UART1CON Select DMA.
4. Write the start DMA address. For receive, Write data to UARTDMARXPTR
5. Enable UART module by setting UTEN to „1‟.
6. kick-start a DMA receive process
7. Wait overflow or delay some time ,read UART1CNTH and UART1CNTL,read data by write UART1MINUS
(UART1MINUS<{UART1CNTH,UART1CNTL}).
8. Write the start DMA address. For transmission, Write data to UARTDMATXPTR
9. Write data to UARTDMATXCNT to kick-start a DMA transmit process
10. Wait for PND to change to „1‟, or wait for interrupt
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