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2.2.4 PORT #1 & PORT #2
• Connector type: 9 pin
sub-D
(male).
•
Location:
rear.
• Usage: for RS232
devices/
general purpose serial communic.
•
Internal
device:
PORT #l
=
FDC37C665GT and Texas LBC 241.
PORT #2
=
FDC37C665GT and Texas LBC 241.
• Buffers:
16
byte, transmit and receive FIFO.
• Baudrates: 50, 75,
110,
134.5, 150, 300, 600,
1200,
1800,
2400
4800,
7200, 9600,
19200
and 38400 up
to 115.2
K.
Independently
programmable baudrate for
receiver
and
transmitter.
•
Dataformats:
character length:
5,
6,
7
or 8 bits.
Stopbit
length: 1
or 2 stopbits.
Parity:
odd, even or no.
• Handshake:
hardware:
CTS,
RTS,
DTR,
DSR,
DCD
.
Software:
XON/
XOFF.
Specifications according
to
EWTIA RS-232E and CCITT
V.28.
• These
inputs/
outputs are full RS compatible.
• Signal
levels: +
and
-
12V
2.3 Parallel port #3
• Connector
type:
DB-25 (fem.).
•
Location:
rear.
• Usage: for printers and general purpose parallel
I/
O.
Bi-directional 8 bit
PC/
Centronics compatible.
• Signal
levels:
input and outputs are TTL
levels.
Signals & Pinning:
Pin
Signal
I/
O
Pin
Signal
I/
O
1
STROBE*
0
14
AUTOFDXT*
0
2
DO
I/
O
15
ERROR*
I
3
Dl
I/
O
16
INIT*
(reset)
0
4
D2
I/
O
17
SEL •
(select
in) 0
5
D3
I/
O
18
GROUND
6
D4
I/
O
19
GROUND
7
D5
I/
O
20
GROUND
8
D6
I/
O
21
GROUND
9
D7
I/
O
22
GROUND
10
ACK*
I
23
GROUND
11
BUSY
24
GROUND
12
PE (paper
empty)
25
GROUND
13
SEL (on-line)
•
Low
=
active
2.4 AT Keyboard port #4
• Connector type: 5 pin DIN.
•
Location: rear.
• Usage: for
PC/
AT compatible keyboard or compatible
peripherals.
• Internal device: AMIKEY-2 (Registered
Name)
• Signal
levels
:
TTL.
Signals & Pinning:
pin
signal
1
clock
2
3
4
5
data
n
.c.
GND
+5V
(300
mA
max)
2. PORT SPECIFICATIONS
Signals &
Pinning:
Pin
Signal
Description
1
DCD
Data Carrier Detect
2
RXD
Received Data
3
TXD
Transmit
Data
4
DTR
Data
Terminal
Ready
5
GND
Signal Ground
6
DSR
Data Set Ready
7
RTS
Request
To
Send
8
CTS
Clear
To
Send
9
RI
Ring
Indicator
Inp/
Outp.
Input
Input
Output
Output
Input
Output
Input
Input
Input: this
is an
input
signal for
the
CD-i
player.
Output:
this is
an output signal from the CD-i player.
Connector pinout
=
IBM
(Registered Name) PC-AT pinout
compatible.
7
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