hi i want to know the meaning of ''optional must be high and optional must be low that is written in xprog eeprom and mcu programmer pdf manual

i am so tired i tried to program an mc68hco8 with no vail

every time it tells me that the device is silent

also the write read icons are grayed out i am so stuck

i connected my xprog as told in manual i am trying to access a mercedes benz immobilizer and trying to to read its mc68h in circuit ....it must be those ''must be low '' statements that i misinterpreted any help is appreciated


thanks