Oki OKIPAGE 8z Service Manual page 139

(4) Signal level
l
LOW : 0 V to _0.8 V
l
HIGH: +2.4 V to 5.;0 V
(5) Interface circuit
l
8w
a) Receiving circuit
(b) Sending circuit
(6) Timing charts
a) Data receiving timing (compatible mode)
b) INPUT PRIME timing (when the INPUT PRIME signal is enabled)