Intel E3845 FH8065301487715 Data Sheet

 

Intel

®

 Atom™ Processor E3800 Product Family

Datasheet

4173

The UART transmits and receives data in bit frames as shown in 

.

•

Each data frame is between 7 and 12 bits long, depending on the size of data 
programmed and if parity and stop bits are enabled.

•

The frame begins with a start bit that is represented by a high-to-low transition.

•

Next, 5 to 8 bits of data are transmitted, beginning with the least significant bit. An 
optional parity bit follows, which is set if even parity is enabled and an odd number 
of ones exist within the data byte; or, if odd parity is enabled and the data byte 
contains an even number of ones.

•

The data frame ends with one, one-and-one-half, or two stop bits (as programmed 
by users), which is represented by one or two successive bit periods of a logic one. 

Each UART has a Transmit FIFO and a Receive FIFO and each holds 64 characters of 
data. There are two separate methods for moving data into/out of the FIFOs—
Interrupts and Polling.

 

I

V1P8S

This signal is muxed and may be used by other functions.

 

O

V1P8S

This signal is muxed and may be used by other functions.

 

O

V1P8S

This signal is muxed and may be used by other functions.

 

I

V1P8S

This signal is muxed and may be used by other functions.

Data

[0]

Data

[1]

Data

[2]

Data

[3]

Data

[4]

Data

[5]

Data

[6]

Data

[7]

Start

Bit

Parity

Bit

Stop
Bit 1

Stop 
Bit 2

LSB

MSB

TXD or RXD pin

Shaded bits are optional that users can program.