APPOTECH CW6632B - Page 81

8 Universal Asynchronous Receiver/Transmitter (UART) 75
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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In normal mode , ,it become “1” every byte, but in DMA mode ,it become “1” every word.
TXIF: UART TX Interrupt Flag
0 = UART transmit not done
1 = UART transmit done
Writing data to UTBUF or Writing UARTDMATXCNT will clear this flag.
OVERFLOWIF: UART overflow Interrupt Flag
0 = UART overflow not done
1 = UART overflow done
RXKICK: UART DMA receive KICK start
0 = not KICK start
1 = KICK start
Register 8-9 UART1DIV – UART1 divide register
Position
7
6
5
4
3
2
1
0
Name
UART1DIV
Default
0
0
0
0
0
0
0
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register 8-10 UART1BAUD – UART1 Baud Rate register
Position
7
6
5
4
3
2
1
0
Name
UART1BAUD
Default
x
x
x
x
x
x
x
x
Access
WO
WO
WO
WO
WO
WO
WO
WO
Baud Rate =Fsys clock / [(UARTDIV+1) ( UART1BAUD + 1)]
Register 8-11 UART1DATA – UART1 Data
Position
7
6
5
4
3
2
1
0
Name
UART1DATA
Default
x
x
x
x
x
x
x
x
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Write this location will load the data to transmitter buffer. And read this location will read the data from the receiver
buffer.
Register 8-12 UARTDMATXCNT –UART1 DMA Transmit counter
Portion
7
6
5
4
3
2
1
0
Name
UARTDMATXCNT
Default
x
x
x
x
x
x
X
x
Access
WO
WO
WO
WO
WO
WO
WO
WO
Nbyte = UARTDMATXCNT + 1