ThermalRunaway
New Member
Hi all,
With regard to SIM card interfacing, does anyone know if the CD pins are normally active low or active high (as in, when you insert the card should the CD line be connected high or low).
I've tried googling and checking the datasheet for the GSM Modem I'm using but it's not clear at all.
I can try it both ways obviously, but if someone here knows the answer then it means I can set it correctly first time on my prototype board! Cheers!
Brian H
With regard to SIM card interfacing, does anyone know if the CD pins are normally active low or active high (as in, when you insert the card should the CD line be connected high or low).
I've tried googling and checking the datasheet for the GSM Modem I'm using but it's not clear at all.
I can try it both ways obviously, but if someone here knows the answer then it means I can set it correctly first time on my prototype board! Cheers!
Brian H