Epson LQ 1050 Technical Manual - Page 74

Table 2-4. Pin Function of GA E05A15HA cent'd

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REV.-A Table 2-4. Pin Function of GA (E05A15HA) (cent'd) f% . . Pin No. Signal Name Diraction Function 26 PWD IN Printhead driving signal 27 PFA OUT Paper feed motor driving signal 28 PFB OUT 29 PFC OUT 30 PFD OUT 31 CTRGO - Not used 32 VDD - +5V 33 P5 OUT Plunger solenoid driving signal 34 WR IN Write strobe signal 35 m IN Read strobe signal 36 I Al 3R I OUT Address bit Al 3 for the P-ROM (4A) 37 I Al 4R I OUT Address bit Al 4 for the P-ROM (4A) ., . : .." 38 HD9 OUT Printhead driving signal (Head Data 9) 39 Al 2 IN Address bit Al 2-Al 5 (input) 40 Al 3 IN 41 Al 4 IN 42 Al 5 IN 43 AO OUT Address bit AO-A2 (output) 44 Al OUT 45 A2 OUT 46 47 I 48 CTRG- m Vss IN I IN Not used Reset signal input Logic Ground 49 ALE IN Address Latch Enable 50 I CTRG+ I IN Not used 51 A3 OUT Address bit A3-A7 (output) ~=.,. I I I 55 A7 OUT 56 DO 1/0 Input/Output data bus: DO - D7 I I I 63 D7 1/0 64 Vrm - +5V NOTE: "Direction"" on the signal flow is as viewed from the gate array. 2-30

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REV.-A
Table 2-4. Pin Function of GA (E05A15HA) (cent’d)
Pin No.
Signal Name
Diraction
Function
26
PWD
IN
Printhead
driving signal
27
PFA
OUT
Paper feed motor driving signal
28
PFB
OUT
29
PFC
OUT
30
PFD
OUT
31
CTRGO
—
Not used
32
VDD
—
+5V
33
P5
OUT
Plunger solenoid driving signal
34
WR
IN
Write strobe signal
35
m
IN
Read strobe signal
36
I
Al
3R
I
OUT
37
I
Al 4R
I
OUT
38
HD9
OUT
39
Al
2
IN
40
Al 3
IN
41
Al 4
IN
42
Al 5
IN
43
AO
OUT
44
Al
OUT
45
A2
OUT
46
CTRG–
IN
47
I
m
I
IN
48
Vss
49
ALE
IN
50
I
CTRG+
I
IN
Address bit Al 3 for the P-ROM (4A)
Address bit Al 4 for the P-ROM (4A)
Printhead
driving signal (Head Data 9)
Address bit Al 2-Al 5 (input)
Address bit AO-A2 (output)
Not
used
Reset signal input
Logic Ground
Address Latch Enable
Not used
51
A3
OUT
I
I
I
55
A7
OUT
Address bit A3-A7 (output)
56
DO
1/0
Input/Output data bus: DO - D7
I
I
I
63
D7
1/0
64
Vrm
—
+5V
f%
.
.
.,
.
:
..”
~=.,.
NOTE:
“Direction””
on the signal flow is as viewed from the gate array.
2-30