DESCRIPTION The OM5610 is a global FM-radio tuner (except Japan) which includes a brand new concept in tuning techniques. The new tuning concept combines the advantages of hand tuning together with electronic facilities and features. TOP VIEW handbook, full pagewidth RF ground 1 2 RF input 3 4 5 6 7 8 9 10 11 12 MBH887 Fig.1 OM5610 connectors. 1997 Apr 25 2 Philips Semiconductors Preliminary specification Matchbox global FM tuner OM5610 PINNING PRESET OPERATION PIN DESCRIPTION In preset mode, the microcontroller has to load information such as frequency band, frequency and mono/stereo. This 1 ground information has to be sent via the bus to the tuner. 2 ground The internal algorithm controls the tuning sequence as 3 WREN follows: 4 CLCK 1. The information is loaded into a shift register, a 5 STEREO last-station memory and the counter. 6 DATA 2. The Automatic Frequency Control (AFC) is switched-off. 7 supply voltage (+5 V) 3. The counter starts counting the frequency and the 8 supply voltage (+12 V) tuning vol