12.4.10 Line Control Register (LCR)

Table 12-17. LCR
Bit Number Name R/W Reset Value Description
7 DLAB R/W 0 Divisor latch access bit. Enables access to the divisor latch registers during read or write operation to address 0 and 1.

0: Disabled (default)

1: Enabled

6 SB R/W 0 Set break. Enabling this bit sets MMUART_x_TXD to 0. This does not have any effect on transmitter logic. The break is disabled by setting the bit to 0.

0: Disabled (default)

1: Set break

5 SP R/W 0 Stick parity

0: Disabled (default)

1: Enabled

When stick parity is enabled, the parity is set according to bits [4:3] as follows:

11: 0 will be sent as a parity bit and checked when receiving.

01: 1 will be sent as a parity bit and checked when receiving.

4 EPS R/W 0 Even parity select

0: Odd parity (default)

1: Even parity

3 PEN R/W 0 Parity enable

0: Disabled

1: Enabled. Parity is added in transmission and checked in receiving.

2 STB R/W 0 Number of stop bits (STB)

0: 1 stop bit (default)

1: 11/2 stop bits when WLS = 00

The number of stop bits is 2 for all other cases not described above (STB = 1 and WLS = 01, 10, or 11).

[1:0] WLS R/W 0 Word length select

0b00: 5 bits (default)

0b01: 6 bits

0b10: 7 bits

0b11: 8 bits