Nokia 2180 服务手册
PAMS
Technical Documentation
NHD–4
Schematics/Layouts & Pinouts
Page 5–3
Original 11/97
BASEBAND FILTER (N2)
IF + FM DETECTOR (D1)
IF + FM DETECTOR (D1)
11
12
13
14
15
16
17
18
19
20
12
13
14
15
16
17
18
19
20
1 Capacitor Input (I–channel)
10
9
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
2 RXI Output (I–channel)
3 RX_FIL_CAL CALlibration start
4 Digital VDD
5 9.8304 MHz Master Clock
6 Digital VSS
7 Connected to Ground
8 Power Down, Active low
9 No Connection (Grounded)
8 Power Down, Active low
9 No Connection (Grounded)
10 RXQ Output (Q–channel)
I_A33
CAL
DVDD
MC
DVSS
PD
XPD
NC
XPD
NC
Q_PFO
Q_A33
NC
Q_AAFI
NC
AVDD
AGND
AVSS
NC
NC
NC
I_AAFI
11 Capacitor Input (Q–channel)
12 No Connection (Grounded)
13 Input (Q–channel)
13 Input (Q–channel)
14 No Connection (Grounded)
15 Analog VDD
16 Analog signal GrouND for external stabilation
17 Analog VSS
18 No Connection (Grounded)
19 No Connection (Grounded)
20 Input (I–channel)
18 No Connection (Grounded)
19 No Connection (Grounded)
20 Input (I–channel)
BASEBAND FILTER N2
N2
11
12
13
14
15
16
12
13
14
15
16
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
D1
9
10
10
IF AMP+FM DETECTOR D1
FIL IN
FIL OUT
DEC
IF IN
VCC
MIX OUT
OSC OUT
OSC IN
FIL OUT
DEC
IF IN
VCC
MIX OUT
OSC OUT
OSC IN
AF OUT
QUAD
IF OUT
RSSI
GND
MIX IN
1 Local oscillator input
2 Local oscillator output
3 Mix output
4 Power supply
5 2nd IF input
6 Decoupling for bias
7 INVERTER AMP output
8 INVERTER AMP input
2 Local oscillator output
3 Mix output
4 Power supply
5 2nd IF input
6 Decoupling for bias
7 INVERTER AMP output
8 INVERTER AMP input
9 Demodulate signal output
10 Phase shift signal input of FM demodulator
11 Output terminal of IF AMP
12 Output is DC vs Signal level (RSSI)
15 GND
16 1st IF signal input
16 1st IF signal input
NC
NC
NC
13 No Connection
14 No Connection
14 No Connection
NC
2 x SYNTH (N300)
1
2
3
4
5
6
7
8
9
10
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
19
18
17
16
15
14
13
12
11
N300
FAST
CPPF
CPP
VDD1
VDD2
PRI
DGND
FXTAL
PDN
NC
A0N
VCC
CPA
AGND
AUX
ISET
E
DATA
CLK
A0N
VCC
CPA
AGND
AUX
ISET
E
DATA
CLK
NC
1 Control input to speed–up main synth
2 Principal synth speed–up charge–pump output
3 Principal synth normal charge–pump output
2 Principal synth speed–up charge–pump output
3 Principal synth normal charge–pump output
4 Digital power supply 1
5 Digital power supply 2
6 1 GHz principal synth RF divider input
6 1 GHz principal synth RF divider input
7 Digital ground
8 Common reference freq input from chrystal ascillator
9 Principal synth power–on input
8 Common reference freq input from chrystal ascillator
9 Principal synth power–on input
10 No Connection
11 Serial clock input
12 Serial data input
13 RX_LE Programming bus enable input (active LOW)
13 RX_LE Programming bus enable input (active LOW)
14 Regulator pin to set the charge–pump currents
15 Auxiliary synth frequency input
16 Analog ground
17 180MHz Auxiliary synth charge–pump output
18 Supply for charge–pump and DAC circuits
19 Auxiliary synth power–on input
20 No Connection
16 Analog ground
17 180MHz Auxiliary synth charge–pump output
18 Supply for charge–pump and DAC circuits
19 Auxiliary synth power–on input
20 No Connection