DR-BT1/BT1K
5
5
DR-BT1/BT1K
3-1. BLOCK DIAGRAM
• Signal path
F
: AUDIO
D10
(BLUE)
PIO1
10
14
2
23
3
1
2
+1.5V REG.
IC3
29
MIC1
MIC
ANT
INH
IC2
BATT
30
ANT2
ANTENNA
SPEAKER
6
3
1
2
7
8
CHGN
MIC_N
PIO0
VDD_IO
RESETB
DC/DC CONVERTER
IC9
5
1
4
CN2
IC4
1
2
SP1
S4
MULITI FUNCTION
4
3
LED DRIVER
Q16
D11
(GREEN)
26
15
24
PIO4
IC7
PIO3
3
4
22
6
1
+2.8V REG.
D9
PIO5
S3
VOL +
S2
VOL -
P1O9
VREG_IN
CHARGE
TERMINAL
RECHAGEABLE
BATTERY (LI-ION)
3.7V
1
2
3
4
B2
Q14
INV.
Q15
DELAY SWITCH
1
PIO11
MOD2
RECEIVER/TRANSMITTER,
MIC AMP,AF AMP,
BLUETOOTH CONTROL
SPKR_P
SPKR_N
PIO10
10
29
2
25
ANT
1
ANT1
ANTENNA
5 MIC_P
PIO11
VDD_IO
CN1
3
LED DRIVER
Q8
11
POWER ON
IC5
6
1
2
DC/DC CONVERTER
+B SWITCH
Q4,5
Pairing/
Power off
PIO9
PIO1
BATTERY
LEVEL DETECT
RECHARGEABLE
BATTERY (NI-MH)
1.2V
B1
28 PIO2
MOD1
RECEIVER,TRANSMITTER
MIC AMP,AF AMP,
BLUETOOTH CONTROL
SPKR_P
P1
PHONE MIC_P
PHONE SPKR_P
(PHONE PLUG)
Q17,18
BUFFER
CN3
4
SWITCHING
Q6
IC1
3
STAT1
IC6
BATT
9
1
2
7
3
OUT
LI-ION BATTERY
CHARGE MANAGEMENT
TEMPERATURE
DETECT
TIME LEDN
D8
(CHARGE)
BATTERY
CHARGER
J1
DC IN 4.5V
10
BUFFER
Q13
CE
IN
VCC
1
2
3
4
1
2
3
4
CN3
STAT1
IC6
BATT
9
1
2
7
3
OUT
LI-ION BATTERY
CHARGE MANAGEMENT
10
BUFFER
Q13
SE
IN
VCC
(BT1K ONLY)
ADAPTOR
HEAD SET
J1
DC IN 4.5V
Q1,3
(BT1 ONLY)
CHARGER
D5
(BLUE)
D6
(GREEN)
S1
S5
D7
D4
Q7(2/2)
Q7(1/2)
14
VDD_IO 15
VREG_IN
D3
D2
CURRENT
CONTROL
Q2
+VB
+VB
-
+
-
+
