PD178016GC-051_15 Datasheet, PDF (51/96 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH BUILT-IN PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO APPLICATIONS

µPD178016GC-051
<3> Upon the completion of emergency broadcasting, the original sound is restored (when the PTY code has
been changed, or 30 seconds after the PTY code can no longer be read).
3.1.9 EON (Enhanced Other Network)
This data is used as the code for the information of an RDS station other than the network of the received RDS
station.
The EON operation is explained next.
(1) When TA of group 14B = 1 (ON), and when the same list as PI (ON) exists in the pool memory, the EON operation
is performed.
<1> Mute is turned on, the LPFSEL pin (pin 27) is driven high after the preceding mute time (3 ms), and the
channel of the pool memory is received.
<2> The signal meter reading is measured by using the S • METER pin 1 ms after the station has been locked.
If the station is not locked after 40 ms, and if the signal meter reading is less than the voltage being input
to the SMT_B/C pin (+0.3125 V), <4> is performed.
<3> The measured signal meter reading is stored into RAM.
<4> The above operation is repeated, starting from <1>, if there is another station to be checked.
(2) PI is checked sequentially, starting from the greatest of the measured signal meter readings.
<1> The channel of the pool memory is received.
<2> After a station has been locked, IF is measured after 5 ms if initial setting diode FM IF/SD is jumpered.
If IF is not within the permissible range, <6> is performed.
<3> The reading of PI is awaited.
If decoding is not performed once within 400 ms, <6> is performed.
If decoding is not performed two times within 800 ms, <6> is performed.
<4> The read PI code is checked for the coincidence of 16 bits.
<5> If the PI code coincides, the receiving of a station is awaited for four seconds until both TP and TA are set
to 1. If a station can be received, that station is received, and the EON operation is completed.
<6> The above operation is repeated, starting from <1>, if there is another station to be checked.
<7> The EON operation is completed if no station is found after all the frequencies of the pool memory have
been searched.
3.1.10 TP (Traffic Program Identification), TA (Traffic Announcement Identification)
TP and TA are used to identify the broadcasting state of traffic information.
Traffic information is received in TP/SK mode.
If the state, in which TP or TA of the RDS station being received is not 1, lasts for four seconds, TP/SK seek up
is started (when initial setting diode RETUNE = 1).
If RDS mode is off, however, TP/SK seek up is started if the state, in which the SK pin (pin 65) is not low, lasts
for four seconds.
(1) Traffic information standby → traffic information reception
The state is changed from traffic information standby to traffic information reception when EON is received with
TP = TA = 1 or TA = 1 (ON).
If RDS mode is off, however, the state is also changed when the SK and DK pins (pin 65 and 64) go low.
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