SCHEMATIC: PUSH BUTTON DEMO TX BOARD
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SW1 |
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1 |
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2 |
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| D1 |
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3 |
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| C2 | C3 | B1 | + |
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R2 |
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10 | 100p | 100n | - | ||
IC2
4 |
| SCK | 7 | HOLD\ | EEPROM Array | GND |
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| 6 | VCC |
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| 6k8 | 3 | WP\ |
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| SI | 5 | SCK |
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| GND |
| SI |
| SO | 10u | ||||
| CS | 1 | CS\ |
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| C1 |
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| 8 |
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3k3 | R5 |
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GND
1
VCC | 3k3 | R4 |
| R3 |
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R1 | 470 |
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| LED |
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SO
IC1
1 | SDI | FSK | 16 |
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2 | SCK | VDD | 15 |
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3 | SEL | IRQ | 14 |
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4 | WS1 | RFP | 13 |
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5 | WS2 | RFN | 12 |
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6 | WS3 | MOD | 11 |
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7 | WS4 | VSS | 10 |
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8 | CLK/SDO | XTL | 9 |
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XTL | 10 MHz |
GND
SMDRET S1 | 3 1 | 4 2 |
SMDRET S2 | 3 1 | 4 2 | SMDRET S3 | 3 1 4 2 | SMDRET S4 | 3 1 | 4 2 |
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| GND |
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Fig 4. IA4220 434 MHz Push Button Transmitter Schematic
Antenna configuration, along with the configuration/frequency setting commands denote operating frequency. Examples of the physical board differences can be seen on the following pages. It can be noted from these layouts that only the antenna is different.
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