User Manual

M-Class 151
Exter n al Sta r t of Print Control Cir cuit Sa m
p
le
Connect ions for an ext er nal S ta rt of Pr int cont rol ca n b e ma de
(1) directly to Pin 4 using a TTL-level input or (2) with an
interface circuit similar to the one shown here (for additional
interfacing da ta , see the table below).
1
4
SOP
8
Gnd
1K
Vcc
GPIO Port Specifications
V
in
max
5.5 VDC maximum input into any pin
V
IH
3.8 VD C minimum (high level inpu t voltage)
V
IL
1.65 VDC maximum (low level input voltage)
I
OH
- 8 mA ty pical, - 2 5 mA maximum (h ig h le v e l o utp ut c urrent)
I
OL
8 mA typical 25 mA ma ximum (low level output current)
V
OH
I
OH
= -8 mA, mi nimum 3.8 VDC
V
OL
I
OL
= 8 mA, maximum .44 VDC