27.5.8 Control C - Normal Mode

This register description is valid for all modes except the Host SPI mode. When the USART Communication Mode (CMODE) bit field in this register is written to ‘MSPI’, see CTRLC - Host SPI mode for the correct description.

Name:	CTRLC
Offset:	0x07
Reset:	0x03
Property:	-


Bit	7	6	5	4	3	2	1	0
	CMODE[1:0]		PMODE[1:0]		SBMODE	CHSIZE[2:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	1	1

Bits 7:6 – CMODE[1:0] USART Communication Mode

This bit field selects the communication mode of the USART.

Writing a 0x03 to these bits alters the available bit fields in this register. See CTRLC - Host SPI mode.

Value	Name	Description
0x00	ASYNCHRONOUS	Asynchronous USART
0x01	SYNCHRONOUS	Synchronous USART
0x02	IRCOM	Infrared Communication
0x03	MSPI	Host SPI

Bits 5:4 – PMODE[1:0] Parity Mode

This bit field enables and selects the type of parity generation. See 27.3.4.1 Parity for more information.

Value	Name	Description
0x0	DISABLED	Disabled
0x1	-	Reserved
0x2	EVEN	Enabled, even parity
0x3	ODD	Enabled, odd parity

Bit 3 – SBMODE Stop Bit Mode

This bit selects the number of Stop bits to be inserted by the transmitter.

The receiver ignores this setting.

Value	Description
0	1 Stop bit
1	2 Stop bits

Bits 2:0 – CHSIZE[2:0] Character Size

This bit field selects the number of data bits in a frame. The receiver and transmitter use the same setting. For 9BIT character size, the order of which byte to read or write first, low or high byte of RXDATA or TXDATA, can be configured.

Value	Name	Description
0x00	5BIT	5-bit
0x01	6BIT	6-bit
0x02	7BIT	7-bit
0x03	8BIT	8-bit
0x04	-	Reserved
0x05	-	Reserved
0x06	9BITL	9-bit (Low byte first)
0x07	9BITH	9-bit (High byte first)