VCC |
VCC
SCHEMATIC:
R1 | SEL |
|
SJ1
NRES 1 2 R2
IRQ
GND
SCK
MISO
MOSI
IC1
| 2 | P0.0 | P2.0 | |
| 1 | |||
| P0.1 | P2.1 | ||
| 28 | |||
| P0.2 | P2.2 | ||
| 27 | |||
| P0.3 | P2.3 | ||
TX | 26 | |||
P0.4 | P2.4 | |||
RX | 25 | |||
P0.5 | P2.5 | |||
| 24 | |||
| P0.6 | P2.6 | ||
| 23 | |||
| P0.7 | P2.7 | ||
|
| |||
| 22 | P1.0 | P3.0/C2D | |
| 21 | |||
| P1.1 |
| ||
| 20 |
| ||
| P1.2 | /RST/C2CK | ||
| 19 | |||
| P1.3 |
| ||
|
|
|
14 | 1 |
13 | 4 |
12 | 3 |
11 | 6 |
10
9
8
7
6
5
SW1 | D1 |
5
R3 GND
820R4
R5 820
D3
Green
D2
Red
R6
820
Red
D4
Yellow
IC2
MOSI | 1 | SDI | NINT/VDI |
SCK | 2 | SCK | ARSSI |
|
| ||
SEL | 3 | NSEL | VDD |
|
| ||
MISO | 4 | SDO | RF1 |
|
| ||
IRQ | 5 | NIRQ | RF2 |
|
| ||
FFS | 6 | FSK/DATA/NFFS VSS | |
|
| ||
16INT/VDI
15 
ARSSI
14VCC
13
12
11 | GND |
L1 
C9C8
GND
X1
50 OHM
FFS
FFIT
INT/VDI
ARSSI
3 TX 2 RX 1
J1
GND
18 | P1.4 | VDD | |
17 | |||
P1.5 |
| ||
16 |
| ||
P1.6 |
| ||
15 |
| ||
P1.7 | GND | ||
|
C8051F311
4
VCC
C1
R7
3NRES 100nF
1k
GND GND
3
2
1
DEBUG
GND
FFIT | 7 | DCLK/CFIL/FFIT NRES | |
| 8 | CLK | XTL/REF |
|
| ||
IA4420
Only rev. C or above!
10 |
9 |
|
| |
C2 | Q1 | GND | |
L3 | |||
| 10MHz | ||
4,7nF |
| ||
|
| ||
GND | GND | VCC |
REPEATER DEMO
BATTERY
1
6V 
2
C3 2,2uFR8
GND
100k
IC3
1IN OUT 5
2 GND
3ON POK 4
VCC
3,3V
C4
2,2uF
|
| VCC |
C5 | C6 | C7 |
1uF | 100pF | 10pF |
GND
Fig 12. IA4420 Transceiver Repeater Demo
14
