Figure 13. Parallel Host Interface UART Register Bit Assignments

REGISTER

REGISTER

 

 

 

BIT NUMBER

 

 

 

 

 

 

 

 

 

 

 

 

 

ADDRESS

NAME

7

6

5

4

 

3

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

Scratch

 

 

 

 

 

 

 

 

 

register

 

 

Scratch register (SCR)

 

 

 

 

 

(SCR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Modem

Data

Ring

Data

Clear

 

Delta

Trailing

Delta

Delta

 

 

Data

Edge of

Data

Clear

6

Status

Carrier

Set

to

 

Indicator

 

Carrier

Ring

Set

to

register

Detect

Ready

Send

 

 

(RI)

 

Detect

Indicator

Ready

Send

 

(MSR)

(DCD)

(DSR)

(CTS)

 

 

 

 

(DDCDD)

(TERI)

(DDSR)

(DCTS)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line

Error in

Transmitter

Transmitter

 

 

 

 

 

 

 

Holding

Break

 

Framing

Parity

Overrun

Data

5

Status

RCVR

 

Empty

register

Interrupt

 

Error

Error

Error

Ready

 

register

FIFO

 

 

(TEMT)

Empty

(BI)

 

(FE)

(PE)

(OE)

(DR)

 

(LSR)

(Note 1)

 

 

 

(THRE)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

Modem

 

 

 

 

 

 

 

Request

Data

Control

0

0

0

Loop

 

Out 2

Out 1

to

Terminal

 

register

 

 

 

 

 

 

 

Send

Ready

 

(MCR)

 

 

 

 

 

 

 

(RTS)

(DTR)

 

 

 

 

 

 

 

 

 

 

 

 

Line

Divisor

 

 

Even

 

Parity

Number

Word

Word

 

Latch

 

 

 

Length

Length

3

Control

Set

Stick

Parity

 

of

Access

 

Enable

Select

Select

register

Break

Parity

Select

 

Stop bits

 

bit

 

(PEN)

bit 1

bit 0

 

(LCR)

(SBRK)

(SPAR)

(EPS)

 

(STB)

 

(DLAB)

 

 

(WLS1)

(WLS0)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIFO

RCVR

 

 

 

 

 

XMIT

RCVR

 

 

Control

RCVR

 

 

 

 

FIFO

2

 

 

 

 

FIFO

FIFO

register

Trigger

Trigger

Reserved

Reserved

 

Reserved

Enable

 

Reset

Reset

 

[write only]

(MSB)

(LSB)

 

 

 

 

(FIFOE)

 

 

 

 

 

(XFIFOR)

(RFIFOR)

 

(FCR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interrupt

FIFOs

FIFOs

 

 

 

Interrupt

Interrupt

Interrupt

‘0’ if

 

Identity

 

 

 

2

register

Enabled

Enabled

0

0

 

ID

ID

ID

Interrupt

 

[read only]

(Note 1)

(Note 1)

 

 

 

bit 2

bit 1

bit 0

pending

 

(IIR)

 

 

 

 

 

(Note 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Interrupt

 

 

 

 

 

Modem

Receiver

Transmitter

Received

 

 

 

 

 

Status

Line Status

Holding Reg.

Data

Enable

0

0

0

0

 

 

 

Interrupt

Interrupt

Empty

Available

 

register

 

 

 

 

 

DLAB=0

 

 

 

 

 

Enable

Enable

Int. Enable

Int. Enable

(IER)

 

 

 

 

 

 

 

 

 

 

 

(MSIE)

(RLSIE)

(THREIE)

(RDAIE)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transmit

 

 

 

 

 

 

 

 

 

0

Holding

 

 

Transmit Holding register (THR) [Write only]

 

 

 

 

register

 

 

 

 

 

DLAB=0

[write only]

 

 

 

 

 

 

 

 

 

 

(THR)

 

 

 

 

 

 

 

 

 

 

Receiver

 

 

 

 

 

 

 

 

 

0

Buffer

 

 

Receiver Buffer register (RBR) [Read only]

 

 

 

 

register

 

 

 

 

 

DLAB=0

[read only]

 

 

 

 

 

 

 

 

 

 

(RBR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Divisor

 

 

 

 

 

 

 

 

 

Latch

 

 

 

MS Divisor Latch (DLM)

 

 

 

 

 

 

 

 

 

 

 

(MS)

 

 

 

 

 

 

DLAB=1

 

 

 

 

 

 

 

 

 

(DLM)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

Divisor

 

 

 

 

 

 

 

 

 

Latch

 

 

 

 

 

 

 

 

 

 

 

 

 

LS Divisor Latch (DLL)

 

 

 

DLAB=1

(LS)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(DLL)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: These bits are always ‘0’ in 16C450 mode.

Page 94
Image 94
Intel 537EX manual Parallel Host Interface Uart Register Bit Assignments

537EX specifications

The Intel 537EX is a powerful and innovative embedded processor designed for a range of applications, particularly in the fields of industrial automation, telecommunications, and transport management systems. This processor is a member of Intel's embedded product line, tailored specifically to meet the demands of systems that require high reliability and long lifecycle support.

One of the main features of the Intel 537EX is its multi-core architecture, which enables efficient parallel processing capabilities. This allows for the execution of multiple tasks simultaneously, significantly improving overall system performance. The processor also incorporates Intel’s advanced power management technology, which ensures that the device consumes energy efficiently, enhances thermal performance, and prolongs the lifespan of the system.

The Intel 537EX supports a range of connectivity options, including high-speed Ethernet and Serial ATA interfaces. This ensures that it can easily integrate into existing systems, seamlessly supporting applications that require robust data transfer capabilities. Additionally, the processor is equipped with multiple I/O ports, facilitating the connection of various peripherals and sensors, which is crucial in industrial applications.

One of the standout technologies within the Intel 537EX is its support for hardware virtualization. This feature allows for the creation of multiple virtual environments within a single physical structure, optimizing resource utilization and enhancing system flexibility. Additionally, Intel’s integrated security technologies provide a significant layer of protection against potential threats, ensuring that embedded systems remain secure.

Another characteristic of the Intel 537EX is its extensive software support, which includes compatibility with various operating systems and development environments. This versatility makes it an attractive choice for developers looking to build or upgrade their embedded systems. With access to Intel's comprehensive software tools, developers can quickly optimize applications to take full advantage of the processor's capabilities.

The Intel 537EX also boasts excellent thermal performance, allowing it to operate efficiently in harsh environments. This is crucial for embedded applications in industrial settings where temperature fluctuations are common. Overall, the Intel 537EX is engineered to deliver high-performance processing power, superior connectivity, and enhanced security, solidifying its position as a reliable choice for demanding embedded applications.