CC1110Fx / CC1111Fx
U1GCR (0xFC) – USART 1 Generic Control
Bit
Name
Reset
R/W
Description
7
CPOL
0
R/W
SPI 1 clock polarity
0
1
Negative clock polarity (SCK low when idle)
Positive clock polarity (SCK high when idle)
6
CPHA
0
R/W
R/W
R/W
SPI 1 clock phase
0
1
Data centered on first edge of SCK period
Data centered on second edge of SCK period
5
ORDER
0
Bit order for transfers
0
1
LSB first
MSB first
4:0
BAUD_E[4:0]
0x00
Baud rate exponent value. BAUD_Ealong with BAUD_Mdecides the UART 1
baud rate and the SPI 1 clock (SCK) frequency
U1DBUF (0xF9) – USART 1 Receive/Transmit Data Buffer
Bit
Name
Reset
R/W
Description
7:0
DATA[7:0]
0x00
R/W
USART 1 receive and transmit data buffer. Writing data to U1DBUFplaces
the data into the internal transmit buffer. Reading U1DBUFreturns the
contents of the receive buffer.
U1BAUD (0xFA) – USART 1 Baud Rate Control
Bit
Name
Reset
R/W
Description
7:0
BAUD_M[7:0]
0x00
R/W
Baud rate mantissa value. BAUD_Malong with BAUD_Edecides the UART 1
baud rate and the SPI 1 clock (SCK) frequency
SWRS033E
Page 161 of 239
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