DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 48

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

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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