Pin assignments:
n
pin 1 is the data strobe
n
pin 16 selects the printer
n
pin 17 resets the printer
n
pins 18-25 are ground
Electrical specifications for
‘ITL
high:
n
volts(H) = 2.7 volts
(V)
n
current
= 20 microamps
@A)
Electrical specifications for
‘ITL
low:
n
volts(L) = 0.4 volts
(v)
n
current = 0.2 milliamps
(mA)
b
1
I
I
i
5 6 7
0 1 2 3 4 5 6 7
43210
PARALLEL IN E[TS
PARALLEL OUT BITS
pg6129d
Figure 6-81. Parallel Port Input and Output Bus Pin Locations in GPIO Mode
Application and Operation Concepts
6.146
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