Coltech EMT707CTL From Clas Ohlson artid: 36-2897
Some discussions I don't understand in Finnish
To open this one up you need a 3 pointed "Nintendo" screwdriver
- LM7805 5Volt standard regulator
- 0053 Rebranded ADE7753 with 3.579545MHz crystal
- Atmel AT89S52 24AU with 12MHz crystal
- Reads from EEPROM
- communicates with ADE7753
- Reads buttons
- Sends LCD updates to PIC1621B
- 24LC03 I2C EEPROM for storing cost, power usage and probably calibration data
- PIC1621B - Only Used as LCD driver
- Uses separate Reset, Clock and Data lines (10 bit?) from AT89S52
| Name | Description |
|---|---|
| CLK | Program Clock |
| GND | |
| MISO | Program MISO |
| VCC | 5 Volt |
| RST | Reset |
| MOSI | Program MOSI |
| Pin | Name | Description |
|---|---|---|
| 1 | VCC | 5Volt from LM7805 |
| 2 | GND | |
| 3 | PWCHK | Goes high when power is stable |
| 4 | CF | ADE7753 CF Pin |
| 5 | ZERO | Toggles with line freq. see ADE7753 ZX Pin |
| 6 | DIN | SPI MOSI |
| 7 | DOUT | SPI MISO |
| 8 | SCLK | SPI Clock |
| 9 | CS | SPI ADE7753 Select |
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