DS21458-W+ Maxim Integrated, DS21458-W+ Datasheet - Page 48
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DS21458-W+
Manufacturer Part Number
DS21458-W+
Description
Network Controller & Processor ICs
Manufacturer
Maxim Integrated
Datasheet
1.DS21458-W.pdf
(269 pages)
Specifications of DS21458-W+
Product
Framer
Number Of Transceivers
4
Data Rate
64 Kbps
Supply Current (max)
328 mA
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
CSBGA
Minimum Operating Temperature
0 C
Operating Supply Voltage
3.3 V
Supply Voltage - Max
3.465 V
Supply Voltage - Min
3.135 V
Part # Aliases
90-21458+W00
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DS21455/DS21458 Quad T1/E1/J1 Transceivers
8. PROGRAMMING MODEL
The DS21455/DS21458 register map is divided into three groups: T1 specific features, E1 specific
features, and common features. The typical programming sequence begins with issuing a reset to the
device, selecting T1 or E1 operation in the master mode register, enabling T1 or E1 functions, and
enabling the common functions. The act of resetting the device automatically clears all configuration and
status registers. Therefore, it is not necessary to load unused registers with zeros.
Figure 8-1. Programming Sequence
POWER-ON
ISSUE RESET
SELECT T1 OR E1 OPERATION IN
MASTER MODE REGISTER
PROGRAM E1 SPECIFIC REGISTERS
PROGRAM T1 SPECIFIC REGISTERS
PROGRAM COMMON REGISTERS
DS21455/DS21458 OPERATIONAL
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