SIO1007 datasheet(24/108 Pages) MICROCHIP

24 / 108 page

SIO1007

DS00002020A-page 24

 2005 - 2015 Microchip Technology Inc.

9.1.6

LINE CONTROL REGISTER (LCR)

Address Offset = 3H, DLAB = 0, READ/WRITE

This register contains the format information of the serial line. The bit definitions are:

Bits 0 and 1

These two bits specify the number of bits in each transmitted or received serial character. The encoding of bits 0 and 1

is as follows:

The Start, Stop and Parity bits are not included in the word length.

TABLE 9-2:

INTERRUPT CONTROL TABLE

FIFO

Mode

Only

Interrupt Identification

Interrupt Set and Reset Functions

Bit 3

Bit 2

Bit 1

Bit 0

Priority

Level

Interrupt Type

Interrupt Source

Interrupt Reset

Control

None

Highest

Receiver Line

Status

Overrun Error, Parity

Error, Framing Error

or Break Interrupt

Reading the Line

Status Register

Second

Received Data

Available

Receiver Data

Available

Read Receiver

Buffer or the FIFO

drops below the

trigger level.

Second

Character

Timeout

Indication

No Characters Have

Been Removed

From or Input to the

RCVR FIFO during

the last 4 Char times

and there is at least

1 char in it during

this time

Reading the

Receiver Buffer

Third

Transmitter

Holding Register

Empty

Transmitter Holding

Reading the IIR

Interrupt) or Writing

the Transmitter

Holding Register

Fourth

MODEM Status

Clear to Send or

Data Set Ready or

Ring Indicator or

Data Carrier Detect

Reading the

MODEM Status

FIGURE 9-1:

SERIAL DATA

Bit 1

Bit 0

Word Length

5 Bits

6 Bits

7 Bits

8 Bits

SIO1007 数据表(PDF) 24 Page - Microchip Technology

SIO1007 数据表(HTML) 24 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载