Boss Audio Systems 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
The following events must bring the voltage stabilizer in reset state:
Main power supplied
Ignition or static on/off switch closed
Power key pressed
Power voltage is OK again after an engine start
Ignition or static on/off switch closed
Power key pressed
Power voltage is OK again after an engine start
The reset pulse for the microcontroller must be at least 20 msec. wide, measured at the threshold level
(max. 3.5 V).
After the end of the reset pulse the power key is sensed and the "KEYB0" output is pulled low to keep the
stabilizer into the reset mode.
When the radio should stay on, (see switching on and off, paragraph 6.1), the "ON" output is pulled low
after the check of the option diodes and when the power key is released.
After approximately 400 msec., the microcontroller tests the HOLD input. If it is low, something is wrong
and the set is switched off, but internally a reset will be generated and the set will try to switch on again.
Else it is continuously monitored for supply voltage failure e.g. starting the cars engine.
(max. 3.5 V).
After the end of the reset pulse the power key is sensed and the "KEYB0" output is pulled low to keep the
stabilizer into the reset mode.
When the radio should stay on, (see switching on and off, paragraph 6.1), the "ON" output is pulled low
after the check of the option diodes and when the power key is released.
After approximately 400 msec., the microcontroller tests the HOLD input. If it is low, something is wrong
and the set is switched off, but internally a reset will be generated and the set will try to switch on again.
Else it is continuously monitored for supply voltage failure e.g. starting the cars engine.
KEYB0
CCR612S
H O L D
V d d
25
1 8
H O L D
V r e g 3
R ES ET
O N
R ES ET
I G N
V s s
TDA3602
Power
Stabilizer
S ta te
C o ntr o l
C o ntr o l
G N D
V r e g 2
V re g 1
V b u
V p
VS1 + 8.5V
VS2 + 5V
1
4
7
5
8
2
9
3
6
3 6
4
3 0
B A T T E R Y
Ig nition Co nt ac t or
st at ic o n/ of f
s w it c h
st at ic o n/ of f
s w it c h
VS3 + 5V
standby
standby
POWER
key
key
3 3 k
4 7 µ
6 8 0 µ
4 7 µ
4 7 µ
7 . 5 A
1 6 0 µ H
2 20 0 µ
1 0 0 k
1 0 0 k
1 2 0 k
1 2 0 k
4 7 k
4 V 7
100n/
for static
on/off swiitch 10µ
for static
on/off swiitch 10µ
4 7 0 n
1 0 k
T 1
T 2
2 2 k
D 1
V s c
C 1
4 7 n
4 7 n
C2
1µ
1µ
4 7 n
1 k
4 7 0 n
4 7 k
4 7 k
4 7 n
4 k 7
Figure 8 Interface with TDA3602 Power stabilizer
Note,
The power key is a momentary push-button, closed only as long as it is pressed down.
The power key is a momentary push-button, closed only as long as it is pressed down.
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