Rainbow Electronics DS21458 - Manual (Page 48)

DS21455/DS21458 Quad T1/E1/J1 Transceivers
48 of 270
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 T1 SPECIFIC REGISTERS PROGRAM E1 SPECIFIC REGISTERS
PROGRAM COMMON REGISTERS
DS21455/DS21458 OPERATIONAL