VCC |
SCL | VCC |
SDA |
|
SCHEMATIC:
mounted. | R1 |
They are not | R2 |
| GND |
SEL |
|
| IC1 | ||
|
|
|
| ||
|
| 2 | P0.0 | P2.0 | |
|
| 1 | |||
|
| P0.1 | P2.1 | ||
SJ1 |
| 28 | |||
| P0.2 | P2.2 | |||
NRES 1 | 2 | 27 | |||
P0.3 | P2.3 | ||||
| TX | 26 | |||
| P0.4 | P2.4 | |||
| RX | 25 | |||
| P0.5 | P2.5 | |||
IRQ |
| 24 | |||
| P0.6 | P2.6 | |||
|
| 23 | |||
|
| P0.7 | P2.7 | ||
|
|
| |||
SCK |
| 22 | P1.0 | P3.0/C2D | |
MISO |
| 21 | |||
| P1.1 |
| |||
MOSI |
| 20 |
| ||
| P1.2 | /RST/C2CK | |||
|
| 19 | |||
|
|
|
| ||
14
13
12
11
10
9
8
7
6
5
SW1
6 | ON | 1 | 1 |
5 |
| 2 | 2 |
4 |
| 3 | |
| 3 | ||
|
|
|
GND
R4
R5 820
820
D1
R6
820
Yellow
D3
Green
D2
Red
MOSI
SCK
SEL
MISO
IRQ
FFS
IC2
1 | SDI | NINT/VDI |
| ||
2 | SCK | ARSSI |
| ||
3 | NSEL | VDD |
| ||
4 | SDO | RF1 |
| ||
5 | NIRQ | RF2 |
|
6FSK/DATA/NFFS VSS
16INT/VDI 
15
ARSSI
14
VCC
13
12
11 | GND |
C8 |
|
|
| GND |
|
| |||
L1 |
| |||
|
| |||
C9 |
| X1 | ||
|
| |||
50 OHM
FFS | 18 | P1.3 |
| |
P1.4 | VDD | |||
FFIT | 17 | |||
P1.5 |
| |||
INT/VDI | 16 |
| ||
P1.6 |
| |||
ARSSI | 15 |
| ||
P1.7 | GND | |||
|
|
4 
VCC
| C1 | R7 | NRES |
|
|
| |
3 | 100nF | 1k |
|
|
| ||
|
|
|
FFIT
7DCLK/CFIL/FFIT NRES
8 | CLK | XTL/REF |
|
10NRES
9
C2 | Q1 |
GND |
L3 |
C8051F311
It is not mounted. |
GND GND
IA4420
Only rev. C or above!
4,7nF
10MHz
3 TX
2RX
1
SERIAL
GND
3
2
1
DEBUG
GND
GND GND
|
| VCC |
C5 | C6 | C7 |
1uF | 100pF | 10pF |
1 |
|
|
|
|
| VCC | 3,3V |
|
|
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|
|
|
|
POWER |
|
|
|
| IC3 |
|
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| |
2 |
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| 1 IN OUT | 5 |
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| |
3 |
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| C3 |
| 2 | GND |
| C4 |
|
|
|
|
|
|
|
BATTERY | 100k |
|
|
|
| R9 | 4,7k R10 | 4,7k R11 | 4,7k |
|
| |||
2,2uFR8 | 3 | ON POK | 4 | 2,2uF | 3 |
|
| |||||||
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| LCD |
|
|
|
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|
|
|
|
| 2 |
|
|
| 1 | VLCD |
|
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|
|
|
|
| R3 10k | 1 |
|
|
|
| 2 | |
|
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|
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|
| VSS | |||
|
| GND |
|
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| 3 | |
|
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| VDD | ||
|
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|
| SDA |
|
|
| 4 | |
|
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| SDA | ||
| GND |
|
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| 5 | |
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| POR | ||
|
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|
| GND | SCL |
|
|
| 6 | |
|
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| SCL | |||
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| |
BT21605
GND
GND
REPEATER DEMO
Fig 9 . IA4420 Transceiver Repeater Demo Schematic
12