User Manual

Architecture
Nortel Networks Confidential
3–8
PE/DCL/DD/0063
411–9001–063
Standard 12.07/EN September 2000
GSM/BSS V12
from master to slave:
– TX : asynchronous data transmitted by the master
– ADR[5..0] : six address lines giving the selected slave address from 00
to 63
– VAL : validation pulse, during which the address must be valid
(negative pulse)
– RAZ : initialization if this reset is pulsed during VAL pulse,
inhibition if the VAL is pulsed during the RAZ (active at
low level)
from slave to master:
– RX : asynchronous data received by the master
Each slave receives from the back–panel six signals, NUC[5..0], that allows it to
determine its address and to compare to the ADR[5..0] address.