Parallel Host Interface 16C450/16C550A UART

9.2.10Receiver Buffer Register (RBR)

Figure 23. Receiver Buffer Register (RBR)

Register 0

(DLAB = 0)

RBR

The RBR (Receiver Buffer register) is a read-only register used for receiving data and AT command responses from the modem.

9.2.11Divisor Latch Registers (DLM and DLL)

Figure 24. Divisor Latch Registers (DLM and DLL)

Register 1

(DLAB = 1)

Register 0

(DLAB = 1)

DLM (MS)

DLL (LS)

The LS divisor latch (least-significant byte) and MS divisor latch (most-significant byte) are two read/write registers used to set the modem data rate. The data rate is selected by loading each divisor latch with the appropriate hex value. The programmable data rates are provided in the following table. For example, to use a data rate of 2400 bps, load a $00h into the DLM and a $30h into the DLL.

Table 29. Programmable Data Rates

Data Rate

Divisor Number

Divisor Latch (Hex)

 

 

 

 

 

(Decimal)

MS

LS

 

 

 

 

300

384

01

80

 

 

 

 

1200

96

00

60

 

 

 

 

2400

48

00

30

 

 

 

 

4800

24

00

18

 

 

 

 

7200

16

00

10

 

 

 

 

9600

12

00

0C

 

 

 

 

19200

6

00

06

 

 

 

 

38400

3

00

03

 

 

 

 

57600

2

00

02

 

 

 

 

536EX Chipset Developer’s Manual

101

Intel Confidential

Page 101
Image 101
Intel 537EX manual Receiver Buffer Register RBR, Divisor Latch Registers DLM and DLL, Programmable Data Rates

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.