ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 215

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

6.17.9.4
9111C–AUTO–02/08
USART Control and Status Register n C – UCSRnC
Table 6-74.
Note:
Table 6-75.
Initial Value
Read/Write
• Bit 2 – UCSZn2: Character Size n
• Bit 1 – RXB8n: Receive Data Bit 8 n
• Bit 0 – TXB8n: Transmit Data Bit 8 n
• Bits 7:6 – UMSELn1:0 USART Mode Select
• Bits 5:4 – UPMn1:0: Parity Mode
• Bit 3 – USBSn: Stop Bit Select
The UCSZn2 bits combined with the UCSZn1:0 bit in UCSRnC sets the number of data bits
(Character SiZe) in a frame the Receiver and Transmitter use.
RXB8n is the ninth data bit of the received character when operating with serial frames with
nine data bits. Must be read before reading the low bits from UDRn.
TXB8n is the ninth data bit in the character to be transmitted when operating with serial
frames with nine data bits. Must be written before writing the low bits to UDRn.
These bits select the mode of operation of the USARTn as shown in
These bits enable and set type of parity generation and check. If enabled, the Transmitter
will automatically generate and send the parity of the transmitted data bits within each
frame. The Receiver will generate a parity value for the incoming data and compare it to the
UPMn setting. If a mismatch is detected, the UPEn Flag in UCSRnA will be set.
This bit selects the number of stop bits to be inserted by the Transmitter. The Receiver
ignores this setting.
Bit
UMSELn1
UPMn1
1. See
0
0
1
1
0
0
1
1
operation
UMSELn1
UMSELn Bits Settings
UPMn Bits Settings
R/W
“USART in SPI Mode” on page 220
7
0
UMSELn0
R/W
6
0
UMSELn0
UPMn0
0
1
0
1
0
1
0
1
UPMn1
R/W
5
0
UPMn0
Parity Mode
Disabled
Reserved
Enabled, Even Parity
Enabled, Odd Parity
Mode
Asynchronous USART
Synchronous USART
(Reserved)
Master SPI (MSPIM)
R/W
4
0
for full description of the Master SPI Mode (MSPIM)
USBSn
R/W
3
0
UCSZn1
ATA6612/ATA6613
R/W
(1)
2
1
UCSZn0
R/W
1
1
Table
UCPOLn
6-74.
R/W
0
0
UCSRnC
215