Table 2-3. Pin Function of CPU (cent’d)
Pin No.
Signal Name
Direction
Function
26
INT1
—
Not used
27
MODE1
—
External mode setting terminal
28
RESET
IN
External reset signal
29
MODEO
—
External mode setting terminal
30
x2 Oscillator terminal. FX-850/1050 : 14.74 MHz
—
31
xl
32
Vss
—
Ground
33
AV
SS
—
Analog port ground
34
ANO
IN
Vp
(+
24VDC) monitor port
35
AN 1
IN
Vu
(+
36VDC) monitor port
36
AN2
IN
Printhead short-circuit monitor port
37
AN3
IN
DIP switch 2-1 to 2-3
I
I
39
AN5
40
AN6
—
Not used
41
AN7
42
VAref
IN
Analog reference voltage input : 4.7V
43 AV
CC
—
Analog port power source
44
RD
OUT
Read strobe signal output
45 WR
OUT
Write strobe signal output
46
ALE
OUT
Address Latch Enable signal output
(Low address : AO -A8)
47
PFO
OUT
High address data (A8 -Al 5)
I
I
54
PF7
55
PDO
IN/OUT
8 bit address/data bus
I
I
62
PD7
63
VDD
—
Internal memory power source
64 Vcc
—
Main power sourse
NOTE: “Direction” on the signal flow is as viewed from the CPU.
2-28
To Next Page
Loading...
