sc16is741ipw NXP Semiconductors, sc16is741ipw Datasheet - Page 20

• Manufacturer Part Number: sc16is741ipw
• Description: Single Uart With I2c-bus/spi Interface, 64 Bytes Of Transmit And Receive Fifos, Irda Sir Built-in Support
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SC16IS741_1
Product data sheet
8.4 Line Control Register (LCR)
[1]
This register controls the data communication format. The word length, number of stop
bits, and parity type are selected by writing the appropriate bits to the LCR.
shows the Line Control Register bit settings.
Table 12.
Bit
7
6
5
4
3
2
1:0
FIFO reset requires at least two XTAL1 clocks, therefore, they cannot be reset without the presence of the
XTAL1 clock.
Symbol
LCR[7]
LCR[6]
LCR[5]
LCR[4]
LCR[3]
LCR[2]
LCR[1:0]
Line Control Register bits description
Single UART with I
Description
divisor latch enable
Break control bit. When enabled, the break control bit causes a break
condition to be transmitted (the TX output is forced to a logic 0 state).
This condition exists until disabled by setting LCR[6] to a logic 0.
Set parity. LCR[5] selects the forced parity format (if LCR[3] = 1).
parity type select
parity enable
Number of stop bits. Specifies the number of stop bits.
Word length bits 1, 0. These two bits specify the word length to be
transmitted or received; see
Rev. 01 — 29 April 2010
logic 0 = divisor latch disabled (normal default condition)
logic 1 = divisor latch enabled
logic 0 = no TX break condition (normal default condition).
logic 1 = forces the transmitter output (TX) to a logic 0 to alert the
communication terminal to a line break condition
logic 0 = parity is not forced (normal default condition).
LCR[5] = logic 1 and LCR[4] = logic 0: parity bit is forced to a logical 1
for the transmit and receive data.
LCR[5] = logic 1 and LCR[4] = logic 1: parity bit is forced to a logical 0
for the transmit and receive data.
logic 0 = odd parity is generated (if LCR[3] = 1)
logic 1 = even parity is generated (if LCR[3] = 1)
logic 0 = no parity (normal default condition).
logic 1 = a parity bit is generated during transmission and the receiver
checks for received parity
0 to 1 stop bit (word length = 5, 6, 7, 8)
1 to 1.5 stop bits (word length = 5)
1 = 2 stop bits (word length = 6, 7, 8)
2
C-bus/SPI interface, 64-byte FIFOs, IrDA SIR
Table
15.
SC16IS741
© NXP B.V. 2010. All rights reserved.
Table 12
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