Maxim DS33Z41 Especificaciones descargar pdf (Pagina 8)

For all Maxim T1/E1 devices with an 8-bit data bus, the device identification register (IDR) is eight bits in length. The

upper four bits are used to identify the device family (e.g., the DS2155, DS21354, DS21552, etc.) The lower four bits are

used to identify the specific revision of the die. Because the lower four bits cannot denote the same alphanumeric

combination as printed on the device, the binary value is simply increased by one when any revision is made to the die

with the value of '0000' indicating the 'A1' revision.

It should be noted that some Maxim telecommunication devices have a 16-bit data bus and follow a different

identification register model, which is detailed in the specific device's data sheet.

Q7. What do the suffixes after Maxim telecommunication device names indicate?

A7. Maxim creates new part numbers with different suffixes, such as DSxxxxL and DSxxxxLB, to separate the package

type, revision, and device type in inventory.

For example, The "L" in DS2155L indicates that the DS2155 is packaged in an LQFP, commercial type. Commercial type

devices have a temperature range of 0°C to +70°C. The "G" in DS2155G indicates that the DS2155 is packaged in a

CSBGA, commercial type. The "LN" in DS2155LN indicates that the DS2155 is packaged in an LQFP, industrial type.

Industrial type devices have a temperature range of -40°C to +85°C. The suffix may also represent a different package

outline drawing or materials analysis.

Q8. What kind of operating system is needed for Maxim telecommunication drivers?

A8. Maxim telecommunication device drivers are written in C and supplied by NComm. The software is designed to be

operating system independent and portable across different operating systems/platforms, such as Windows®, Linux®,

and VxWorks®. The user can integrate the driver with their application that is not directly functional on the operating

system. The user needs only to create code that makes the driver to work within its environment.

Maxim telecommunication device drivers can be obtained by submitting an email request to

telecom.support@maxim-ic.

com. Please note that company contact information must be provided before the request can be processed.

3. Framer/Single-Chip Transceiver Questions

Q1. How are the DS21x5y, DS215y, or other telecommunication devices initialized?

A1. Some devices like the DS2155 T1/E1 SCT or DS2148 LIU, offer a power-on reset and a hardware reset pin that clears

out all the registers. Other devices require software to write a 0x00 to address space 0x00 to 0xFF, regardless of register

type or documented presence. This ensures that all of the registers are cleared and the device is in normal operation

mode.

Q2. Do Maxim telecommunication devices support unframed or transparent-mode operation?

A2. Yes. A description of how to configure a device for unframed or transparent-mode operation is provided in application

note 336, "

Transparent Operation on T1, E1 Framers and Transceivers."

Q3. Is it necessary to repeat the same data on the TSIG pin for an entire multiframe when using

hardware-based signaling?

A3. Yes. The chip is designed to expect signaling data during the least significant nibble throughout all timeslots and all

frames of a multiframe. Failure to do so causes unstable results.

Q4. How are JTAG functions implemented on SCT multichip modules such as the DS21Q352/

DS21Q55?

A4. A multichip module is any device that contains multiple die or devices housed in the same package. The DS21Q352,

DS21Q354, DS21Q552, DS21Q554, and DS21Q55 are all examples of quad-port, SCT multichip modules. Each of these

multichip modules has four single-port devices with daisy-chained JTAG functionality. This is necessary because each

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