HP PageWriter XL M1705B Service Manual page 214

mansion Connect
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Table A-8 System Ex
Row B Row C
GROUND MIOn
Pin
1
2
3
4
5
6
7
8
9
10
11
12
' Row A
+5v
A(17)
A(181
w-0
AC201
1 18 1 GROUND
i
A(21)
A(13) A(5)
I
221
ADS
D(8)
D(O)
A(61
I
231
DCn
A(7)
4469
GROUND
+5v
nRESETP
D(15) D(7)
13 IBITO GROUND GROUND
14 GROUND DIR +5READY
15 HLDA VBACK7 $5V
16 HOLD BTl nWAIT
VIN LCD0.N
;; I"";;"" /
nBHE nBLE
WRn GROUND
Signal
+5READY
Definition
Goes high when cardiograph +5 volt supply is within
regulation. C 1 loes ow when $5 volt supply is off or
out of regulation.
CPU address bus.
CPU address strobe-active high.
l?us cycle state bits. Indicates current bus cycle.
CPU data bus.
CPU output. 1 = data, 0 = control cycle.
Hold acknowledge from CPU.
IIold request from CPU.
General purpose input bits.
Expansion interrupt.
Interrupt line to the CPU.
Enables preview LCD.
Control that identifies data as display or instruction.
LCD read/write control-l = read, 0 = write.
CPU meniory/IO control signal. 1 = iiieinory cycle,
0 = I/O cycle.
A( l)-A(23)
ADS
BTO, BTl
D(O)-D(X)
DCn
HLDA
HOLD
IBITO, IBIT
INT7
INTR
LCDON
LCDRS
LCDRW
MI011
A-8 Connector Pin Assignments