Philips ProDVD 175, Техническое руководство

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ProDVD 175
ProDVD 175
For more information about the ProDVD 175, please contact the website: www.prodvd.philips.com
Device identification pointing devices
Every pointing device is to transmit its type
identification (ID) byte on request. This allows the
player to identify the device type that is connected
to it for maximum flexibility and ease of use.
Device ID sequence
• Negate RTS: Current data transmission to the
player is stopped.
• Assert RTS.
• The device sends its 1-byte device ID.
Note: It is adviseable to send a complete data packet
after the identification byte to establish the state of
the buttons.
Device ID timing
• A: device power-on to ID byte timing
− Min. 100ms
− Max. 500ms.
• B: negate RTS timing:
− Min. 10ms
− Max. irrelevant.
• C: Residual data transmission time when RTS is
negated:
− Min. 0 ms.
− Max. 1 byte period (1200 baud = 8.3ms)
• D: Assert RTS to ID byte timing when device is
powered:
− Max. 10ms.
External controller protocol
The communication with an external ProDVD
controller is done with the following settings:
− 8 data bits,
− 1 stop,
− no parity bit
− speed of 9600 Baud.
Device
Power
RTS
RXD
ABD
D
D
B D
Device ID codes
Device Type d6--d0 ASCII
Relative 1001101 ’M’
Maneuvering 1001010 ’J’
Absolute 1010100 ’T’
Absolute Screen 1010011 ’S’