PD17012GF-055_15 Datasheet, PDF (12/84 Pages) Renesas Technology Corp – SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR CAR-MOUNTED FM/MW/LW RADIO

µPD17012GF-055
Pin No. Symbol
Pin Name
Description
24
XOUT Crystal resonator
This pin is for connecting the crystal resonator.
25
XIN
A 4.5-MHz crystal resonator is connected.
When using the clock function, the precision of the oscil-
lator frequency affects that of the clock.
Adjust the oscillator frequency while observing the PLL
local oscillator frequency.
26
GND Ground
This is the ground pin.
27 VOLSDA Electronic volume
data input/output
This is the serial data I/O pin with electronic volume.
Because this is an N-ch open-drain output, connect pull-up
resistor externally.
28 VOLSCL Electronic volume
data output
This is the serial data input pin with electronic volume.
Because this is an N-ch open-drain output, connect pull-up
resistor externally.
29
MUTE MUTE signal output This is the sound MUTE signal output pin.
It is output at low level.
It is used to remove the shock noise occurring when the
PLL lock is not in place in RADIO mode, or to switchover
the MODE pin output.
For this is N-ch open-drain output, connect pull-up resistor
externally.
30 IFCREQ IF count request
signal output
This is the IF count request signal output pin.
It outputs high-level with SD during seek.
Because this is an N-ch open-drain output, connect pull-up
resistor externally.
31
CD
CD play signal input This is the CD play signal input pin.
By inputting high level to this pin, the sound source
(MODE output) can be switched to CD. The CD play signal
takes precedence over the tape signal.
32
TAPE Tape signal input
This is the tape signal input pin.
By inputting high level to this pin, the sound source
(MODE output) can be switched to tape.
33
R/L Tape run signal
input
This is the tape run signal input pin.
It is used for display on the LCD panel.
Enter data as follows.
I/O Format
CMOS
push-pull
input
—
N-ch
open-drain
output
N-ch
open-drain
output
N-ch
open-drain
output
N-ch
open-drain
output
Input
Input
Input
R/L Pin
Low level
High level
Tape Run Direction
Left → right
Right → left
34 STEREO Stereo signal input
This is the stereo signal input signal.
Enter data as follows.
STEREO Pin
Low level
High level
Description
Stereo broadcasting
Monaural broadcasting
Bands other than FM are invalid.
35-41,
IC
Internal connection Connect this pin to the GND directly.
49-53,
58
Input
—
10