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I/O PORT
The ProDVD 175 professional DVD player can
also be controlled by an external controller or a
pointing device. This can be done via the I/O port
at the rear of the player. The connector type is
a D-sub 9 male. One and the same interface is
used for pointing devices as well as for external
control.
• The pointing device protocol has an automatic
pointing device protocol activated when the
transmission speed is 1200 baud.
• The control via an external controller is activated
when the transmission speed is 9600 baud.
Pinning input (sub-D9 male
on the player):
Pin
signal
1
2
RXD
3
TXD
4
+5V
max 200mA
5
GND
6
7
RTS
8
CTS
9
I = input signal for the Player
O = output signal from the Player
For more information about the ProDVD 175, please contact the website:
Pointing device protocol
Communications signals follow the RS-232-C
specifications. For details of this see the EIA RS-
232- C standard.
− 1 start bit
− 7 data bits LSB first
− 2 stop bits
− Speed 1200 bauds
For pointing devices only two signal lines carry
data. The first is RTS, which is always output from
the player. The second is RXD, which is always
input to the player.
RATINGS:
+5V output from the player:
− accuracy: +5V 10%
I/O
− supply current: min 200mA
I
RXD /TXD
O
− logical 1: -15V < signal level < +0.8V
− logical 0: +2.4V < signal level < +15V
(Output impedance pointing device max 4.7kOhm)
O
RTS /CTS
I
− Off (Negated): -15V < signal level <+0.8V
− On (Asserted): +2.4V < signal level <+15V
This interface allows for pointing devices and accessories
which are powered from the player using logic circuits
operating on 5V only.
ProDVD 175
ProDVD 175
www.prodvd.philips.com
4
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