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Fig 9 . IA4420 Transceiver Repeater Demo Schematic
12
3,3V
Only rev. C or above!
They are not mounted.
It is not mounted.
123
ON
+-
P0.0
2
P0.1
1
P0.2
28
P0.3
27
P0.4
26
P0.5
25
P0.6
24
P0.7
23
P1.0
22
P1.1
21
P1.2
20
P1.3
19
P1.4
18
P1.5
17
P1.6
16
P1.7
15
P2.0
14
P2.1
13
P2.2
12
P2.3
11
P2.4
10
P2.5
9
P2.6
8
P2.7
7
P3.0/C2D
6
/RST/C2CK
5
VDD
4
GND
3
IC1
R1R2
R4
R5
R6
D1
D2
D3
C1
2
1
SJ1
R7
1
2
3
SERIAL
1
2
3
DEBUG
C2
Q1
1
2
34
5
IC3
GND
IN
ON
OUT
POK
R8
C3 C4
C5 C6 C7
L1L3
C8C9
X1
VLCD
1
VSS
2
VDD
3
SDA
4
POR
5
SCL
6
LCD
13
2
R3
R9
R10
R11
4
5
61
2
3
SW1
BATTERY
1
2
3
POWER
SDI
1
SCK
2
NSEL
3
SDO
4
NIRQ
5
FSK/DATA/NFFS
6
DCLK/CFIL/FFIT
7
NINT/VDI
16
XTL/REF
9
CLK
8
VSS
11
RF2
12
RF1
13
VDD
14
ARSSI
15
NRES
10
IC2
TX
TX
RX
RX
SEL
SEL
IRQ
IRQ
SCK
SCK
MISO
MISO
MOSI
MOSI
FFS
FFS
FFIT
FFIT
INT/VDI
INT/VDI
ARSSI
ARSSI
SCL
SCL
SDA
SDA
NRES
NRES
NRES
C8051F311
GND
VCC
820
820
820
Red
Green
Yellow
VCC
GND
GND
VCC
100nF
GND
GND
1k
4,7nF
10MHz
GND GND
GND
VCC
GND
IA2112-3.3V
100k
2,2uF 2,2uF
VCC
1uF 100pF 10pF
VCC
GND
VCC
GND
GND
GND
BT21605
10k
GND
GND
4,7k
4,7k
4,7k
GND
IA4420
SCHEMATIC: 50 OHM REPEATER DEMO