"Meine Frage dazu ist, braucht man den Reset-Pin?"
Nein
"Oder kann man diesen mit einen PullUp fest auf High legen?"
Ja
siehe Datenblatt:
"Reset: A low state on the reset pin (RESET) will terminate the
operation in progress and reset the internal state machine to an idle
state. The device will remain in the reset condition as long as a low
level is present on the RESET pin. Normal operation can resume once the
RESET pin is brought back to a high level. The device incorporates an
internal power-on reset circuit, so there are no restrictions on the
RESET pin during power-on sequences. If this pin and feature are not
utilized it is recommended that the RESET pin be driven high
externally."
Gruß