Service manual
·_
CE-1600E
10RQ
Address
Data
MI A7
A6 AS A4 A3
A2 Al AO
WR
IID
Operation
D7 D6 05 D4 D3 D2
01
DO
1
1
0 0
v------
FD INT
l-----
--
0 0 0
0
0
0
1
FFI data write
0
*
-----
---
Enable
1
0
FF1 data read
1
1 1
1
1 1 1 1
FD reset
0 0 0
1
0
1
FD Reset
(0: reset)
PAO-7read
.>
(0 ) (0) (0)
Comparator
Vp LB
Centronics
1
Q
FD INT
LB BUSY
FF2(~)
-:
Centronics Centronics
I----
--
0 0
1
0 0
I
Pullup
~
data write
iNiT
"STJm!it
--
1
11
FF2(~)
1
1
1
1
1
1 1
1
data read
0
FF3(~)
Centronics
~entronics
Centronics
Centronics
Centronics
Centronics
Centronics Centronics
0
1 1
0
1
data write
DATAI
DATA2 DATA3 DATA4 OATAS DATA6 DATA7 DATA8
1
0
FF3(~)
1 1 1
1 1 1
1
T
data read
NOTE: All
are active high (1: active, 0: inactive) as seen Irom the
CPU,
except lor
FD
reset (0: active).
©
LR38045 gate array signal description
PIN No.
Pin name
1/0
effective Highlow at reset
Descriltion
1-8
PC7N-PCON
Out
low High
8-bit output
port
(port address 83H)
00-D7 corresponds to PCO-7N via FF3.
9-16
PB7N-PBON
Out
low High
I-bit output
port (port
address 82H)
00-D7 corresponds to PCO-7N via FF2.
17
(NC)
18
PUl
In
(Low)
PU input
[ Used to create 32KB ROM select signal (CSNO).
J
19
PTI
In
(High)
PT input
20
EZI
In
(High)
Eminput
21
MINI
In (High)
MI irclut
[~ed
to
create 107N and gate array interna! enableJ
22
10RQ
In High
IORQ input
Signals.
23
MRQI
In High
MREQ input (used to create CSNO).
24
RSTI
In High
Reset
input.
When
the
reset
signal
is
entered,
the
intemal
~1Iop
is
reset
and RSTN (2.5' FDD reset signal)
is
sent out.
25
Vcc
.
26
GND
) Power supply
27
IRQ
Out
Low High Z
All N-cIW1nel
open
drain interrupt signal output wtich
is
puIed ~
toVCC
on
the
PC-1600 siele.
28
RDNI
In
low
Jm"input
29
WRNI
In
low
WR"input
30
I
AOI- A71A141, A1SI
In
Address input
39
40
(NC)
2.5' FDD reset
signal
output.Sent out lIlCOIidiliolfilly
with
the
reset
signal
41
RSTN
Out
low
low
and
must
be
canceled by means of software.
It
is
possble
to
send
out
softwarewise. (Address 81H, 00,
WR")
42
107N
Out
low (High)
2.5' FOD select signal.
(SenT out
via
address 70H-7FH.)
43
CSNO
Out
low
(High)
321<8ROM select signal.
rm
MREQ. PT············High
pU·····················low
Address········· ···4000H -7FFFH
(PV"'low; Centronics interface, High; FDD)
44-51
DBO-DB7
ln/Out
(8-bit) data input
and
output.
52
I
PAOI-PASI
In
low
Il1lut
port
(port
address 81H)
57
PAD-61 corresponds to DO-6.
60
PA61
(Interrupt controled by FFI (address 80H) output 00-6.)
58
GNO'
Power supply
59
(NC)
61
PA7B
Out
High
62
PA7N
(Out)
64
PA71
In
High
63
(NC)