upd178016 Renesas Electronics Corporation., upd178016 Datasheet - Page 31

• Manufacturer Part Number: upd178016
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Momentary key
SEL/LOUD
TP/SK
TAPE
This key acts as the loudness ON/OFF key when it is held down for two seconds. When it is released within
two seconds, this key selects the electronic volume control function.
(1) Selecting the electronic volume control function
(2) Loudness ON/OFF setting
(1) In radio/CD changer mode
(2) In tape mode
This key is used to turn ON/OFF traffic information interrupt enable mode (TP/SK mode). This key is valid in
power-on mode. While an AM band is being received, however, presing this key causes the FM1 band to be
selected.
TP/SK mode is turned ON/OFF for each band (FM1, FM2, and FM3).
•
While TP/SK mode is ON, the operations performed are as follows.
• While traffic information is being received
• While traffic information is not being received
TP/SK mode is OFF in the initial state after power is first applied.
TP/SK mode ON/OFF setting
If the device is tuned to an FM band station, this key is valid even in CD changer/tape mode. When TP/
SK mode is selected, LCD indicator “TP/SK” appears.
In TP/SK mode, auto-seek detects traffic information stations only.
In radio mode, the SK MUTE pin (pin 19) outputs a high level signal.
The TA/DK pin (pin 18) outputs a low level signal.
In CD changer/tape mode, radio mode is selected, and traffic information is output.
In radio mode, the SK MUTE pin (pin 19) outputs a low level signal.
The TA/DK pin (pin 18) outputs a high level signal.
Each time this key is pressed to select the electronic volume control function, the mode changes as
illustrated below.
If initial setting diode FAD is jumpered, fader mode cannot be used.
Each time the key is pressed, one of the above modes is set for five seconds. In each electronic
volume control mode, adjustment can be made by using the VOL UP or VOL DOWN key.
For details, refer to the description of the VOL UP and VOL DOWN keys.
The volume can be adjusted in normal display mode.
In each of the above modes, “VOL”, “BAS”, “TRE”, “BAL”, or “FAD” and the set value are displayed.
After five seconds, normal display mode is restored.
When loudness mode is ON, LCD indicator “LOUD” appears.
At this time, the LOUD pin (pin 48) outputs a high level signal.
The volume control display is cleared when the system is started by pressing the POWER key.
Loudness mode is off in the initial state when the power is first applied.
This key is used to select tape mode.
This key switches the tape side between A and B.
Normal
5 seconds
Volume
Bass
Description
Treble
Balance
Fader
PD178016GC-051
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