Boss Audio Systems Car Stereo System CCR612 사용자 설명서
Philips Semiconductors
User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)
Car Radio System CCR612 (V0.3)
Application Note
96029
Pins 18 to 24 of CCR612 with fixed front.
Pin
Name
I/O
Type
Description
18
KEYB0
I/O
IP 1
Line of the triangular keyboard matrix
19
KEYB1
I/O
IP 1
Line of the triangular keyboard matrix
20
KEYB2
I/O
I
I
IP 1
Line of the triangular keyboard matrix
Option diode for tuning grid and band limits (USA / Europe
option)
Option diode for tuning grid and band limits (USA / Europe
option)
21
KEYB3
I/O
I
I
IP 1
Line of the triangular keyboard matrix
Option diode for available bands.
Option diode for available bands.
22
KEYB4
I/O
IP 1
Line of the triangular keyboard matrix
23
KEYB5
I/O
IP 1
Line of the triangular keyboard matrix
24
KEYB6
I/O
IP 1
Line of the triangular keyboard matrix
The fixed keyboard (See Figure 6) is scanned every 10 milliseconds. To scan the keyboard, the lines are
made low - one at a time - and then the state of the other lines are read. For debouncing, a keypress must
be detected 3 times before it is accepted.
made low - one at a time - and then the state of the other lines are read. For debouncing, a keypress must
be detected 3 times before it is accepted.
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