In/Out Expander; Buttons; Environment - Philips SpeechMike II LFH5260 Service Manual

Speech processing usb microphone
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Besides managing the audio information the micro Controller is communicating via a
proprietary communication channel with the

10.4 In/Out expander

IC401 is an 8-bit µP used as In/out expander and ADC for the buttons and indication leds of
the SpeechMike II. The communication between µ Controller IC101 and IC 401 is handled
via a proprietary communication system using pin 5 PER Clock and pin 6 PER Data. IC401
provides also the MUTE information whenever a button of the SpeechMike is pressed.

10.5 Buttons

SK 407
SK408
SK409
SK410
SK 411
SK412
SK413
SK413
SK413
Switch
Slide switch

11 Environment

As a matter of course the new SpeechMike Barcode is produced according to the RoHS
Directive:
More information about ROHS can be found under following link:
RoHS Directive
Button on bottom of the set
Button on bottom of the set
Mouse button left
Mouse button right
Scroll wheel
Function button left
Function button left
Function button right
Function button right
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