2. General Device Operation Questions
Q1. What are the standard register settings for a Maxim telecommunication device?
A1. Because there are many different ways that a T1, J1, E1, T3, or E3 device can communicate, there are no standard
register settings. After initialization, there are three register types that control all major device operations. These are the
receive control registers (RCRx), the transmit control registers (TCRx), and the common control registers (CCRx).
Q2. What software is available for use with Maxim telecommunication devices?
A2. Software drivers are available for the following T1/E1 devices:
DS2152, DS2154, DS21(Q)352, DS21(Q)552, DS21(Q)354, DS21(Q)554, DS21(Q)55, DS21455, and DS21458.
Software drivers are available for the following T3/E3 devices:
DS3112, DS3141, DS3142, DS3143, DS3144, DS3151, DS3152, DS3153, and DS3154.
The drivers are written in C and supplied by NComm. The drivers may be obtained by submitting an email request to
[email protected]. Please note that company contact information must be provided before the request can be processed.
Q3. Can you provide an example design using various processors?
A3. There are several example designs using processors by various manufacturers located in the Communication Circuits
section of our online application notes.
Q4. Can you provide a reference design for the network interface?
A4. Application note 324, "T1/E1 Network Interface Design," provides all the information required to implement the
network interface.
Q5. What is the meaning of the markings on Maxim devices?
A5. Example markings for the DS2149 28-pin PLCC package:
MAXIM
DS2149 - Device
YYWWRR - Date code
###XX - Lot code
Date Code:
YY - Last two digits of the year of assembly
WW - Week within the year of assembly
RR - Revision
Lot Code:
### - Last three digits of the lot number
XX - Up to two alpha characters that are behind those digits
Q6. What is the difference between the device identification register (IDR) value and the device
revision markings on Maxim devices?
A6. The device revision, printed on the top of the package, consists of an alphanumeric combination that is two
characters in length. The alpha character denotes the current level of an all-layer die revision, with the first die being
denoted with the letter 'A'. The numeric character denotes the current level of a metal layer die revision, with the first die
being denoted with the number '1'. If only the metal layers of the die are revised, then the numeric portion is increased
by one. When all the layers of the die are revised, then the alpha portion is increased by one letter and the numeric
portion is returned to the number '1'. Further changes follow the same standard.
(167 Seiten)
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