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10RQ
Address
MI
A7 A6 AS A4 A3 A2 Al
1
1
0
0
0
0
0
0
0
0
0
0
0
NOTE: All
are active
high (1: active,
© LR38045 gate array signal description
PIN No.
Pin name
1-8
PC7N-PCON
9-16
PB7N-PBON
17
(NC)
18
PUl
19
PTI
20
EZI
21
MINI
22
10RQ
23
MRQI
24
RSTI
25
Vcc
26
GND
27
IRQ
28
RDNI
29
WRNI
30
I
AOI- A71A141, A1SI
39
40
(NC)
41
RSTN
42
107N
43
CSNO
44-51
DBO-DB7
52
I
PAOI-PASI
57
60
PA61
58
GNO'
59
(NC)
61
PA7B
62
PA7N
64
PA71
63
(NC)
WR IID
AO
Operation
0
0
0
1
FFI data write
1
FF 1 data read
0
FD reset
0
1
0
1
(0: re set)
.>
1
Q
PAO-7read
-:
FF2(~)
I
1
0
0
data write
FF2(~)
1
11
data read
FF3(~)
Centronics ~entronics
1
1
0
1
data write
FF3(~)
1
0
data read
0: inactive)
as seen
Irom the
1/0
effective
Highlow at reset
Out
low
Out
low
(Low)
In
In
(High)
In
(High)
In
(High)
In
High
In
High
In
High
Out
Low
In
low
In
low
In
Out
low
Out
low
Out
low
ln/Out
In
low
Out
(Out)
In
D7
D6
05
v------
0
*
-----
1
1
1
(0 )
(0)
Centronics Centronics
Pullup
iNiT
"STJm!it
1
1
1
Centronics
Centronics Centronics
DATAI
DATA2
DATA3
DATA4
1
1
1
CPU,
FD
except
lor
reset (0: active).
8-bit
output port (port address 83H)
High
00-D7
corresponds to PCO-7N via FF3.
I-bit
output port (port address 82H)
High
00-D7
corresponds to PCO-7N via FF2.
PU input
PT input
Eminput
MI irclut
IORQ input
MREQ input (used to create CSNO).
Reset input. When the reset signal is entered, the intemal ~1Iop is reset
and RSTN (2.5' FDD reset signal) is sent out.
.
) Power supply
All N-cIW1nel open drain interrupt signal output wtich is
High Z
the
on
PC-1600 siele.
Jm"input
WR"input
Address input
2.5' FDD reset signal output.Sent out lIlCOIidiliolfilly with the reset signal
low
be
and must
canceled by means of software. It is
softwarewise.
2.5' FOD select signal.
(High)
via
(SenT out
(High)
321<8ROM select signal.
rm
MREQ. PT· · · · · · · · · · · · H igh
pU· · · · · · · · · · · · · · · · · · · · · l ow
Address· · · · · · · · ·
(PV"'low;
(8-bit)
data input and output.
Il1lut
port
(port address 81H)
PAD-61 corresponds to DO-6.
(Interrupt
controled by FFI (address 80H) output 00-6.)
Power supply
High
High
Data
---
D4
D3
D2
FD INT
l-----
Enable
1
1
1
Comparator
(0)
FD INT
--
LB
I----
~
1
1
1
Centronics
Centronics
OATAS
DATA6
1
1
1
Descriltion
[ Used to create 32KB ROM select signal (CSNO).
[~ed
to
create 107N and gate array interna! enableJ
Signals.
WR")
(Address 81H, 00,
address 70H-7FH.)
· · · 4 000H -7FFFH
Centronics interface,
High; FDD)
· _
C E-1600E
--
01
DO
1
1
FD Reset
Centronics
--
Vp LB
BUSY
1
1
Centronics
DATA7
DATA8
1
T
J
toVCC
puIed ~
to send out
possble
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