PD178016GC-051_15 Datasheet, PDF (10/96 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
1. PIN FUNCTIONS
Pin No. Symbol
Pin name
Description
1
SMT_A/B Signal meter reading Pins used for setting the signal meter voltage ranges used to
2
SMT_B/C range input
determine the condition for starting an AF operation. Input analog
voltages according to the characteristics of the tuner being used
(See (1) in Section 3.1.5).
3
S • METER Signal meter signal Input pin for signal meter signal.
input
Input an analog signal in accordance with the received signal
strength. This pin is used to monitor the conditions controlling AF
switching.
4
SD
SD signal input
Input pin for the station detection signal.
Input the signal as indicated in the table below.
I/O type
Analog
input
Analog
input
Input
SD pin
Description
0
Station detected
1
Station not detected
(0: Low, 1: High)
5
STEREO Stereo signal input Input pin for the stereo broadcast signal.
This pin is valid for the FM band only.
Input the signal as indicated in the table below.
Input
STEREO pin
Description
0
Stereo broadcast
1
Mono broadcast
(0: Low, 1: High)
6
AMS_IN Audio signal input Pin indicating input of the audio signal from the logic tape deck.
Input
Input the signal as indicated in the table below.
AMS_IN pin
Description
0
Audio signal not input
1
Audio signal input
(0: Low, 1: High)
7
AMS_SW AMS switch signal Input pin for logic tape deck state.
input
Input the signal as indicated in the table below.
Input
AMS_SW pin
Description
0
AMS mode
1
Other than AMS mode
(0: Low, 1: High)
8
STOP_SW STOP switch signal Input pin of logic tape deck state.
input
Input the signal as indicated in the table below.
Input
STOP_SW pin
0
FF/REW
1
PLAY
Description
(0: Low, 1: High)
8