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boards:ecb:4pio-i2c:development [2023/02/18 22:59]
b1ackmai1er |
boards:ecb:4pio-i2c:development [2023/02/18 23:19] (current)
b1ackmai1er |
| * On solder side connect pin 19 IC13 to pin 2 IC2 | * On solder side connect pin 19 IC13 to pin 2 IC2 |
| * On component side, cut track between IC16 pin 17 and IC13 pin 19. | * On component side, cut track between IC16 pin 17 and IC13 pin 19. |
| * 4PIO-I2Cd | * 4PIO-I2Cd |
| * Component placement, routing changes. | * Component placement, routing changes. |
| * Initial ROMWBW HBIOS support. | * Initial ROMWBW HBIOS support. |
| * Add jumper to connect DS1307 battery backup to backplane battery backup. | * Add jumper to connect DS1307 battery backup to backplane battery backup. |
| * Add support for 3.3v I2C peripherals using logic level translator. | * Add support for 3.3v I2C peripherals using logic level translator. |
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| ====== Board ====== | ====== Board ====== |
| ^WRITE|11010001 (D1)| | ^WRITE|11010001 (D1)| |
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| {{:boards:ecb:4pio-i2c:development:pcf8574.pdf|PCF8574}} > {{:boards:ecb:4pio-i2c:development:hd44780_lcd_driver_datasheet.pdf|LCD}} {{https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=842ba7&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=100ca2&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=10f051&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=5ed9e3&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=f3f91e&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=f46157&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=b40609&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=boards:ecb:4pio-i2c:development:i2c-lcd-backpack.png?linkonly|backpack}} | {{:boards:ecb:4pio-i2c:development:pcf8574.pdf|PCF8574}} > {{:boards:ecb:4pio-i2c:development:hd44780_lcd_driver_datasheet.pdf|LCD}} {{https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=0bc8fd&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=842ba7&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=100ca2&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=10f051&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=5ed9e3&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=f3f91e&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=f46157&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=b40609&media=https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=boards:ecb:4pio-i2c:development:i2c-lcd-backpack.png?linkonly|backpack}} |
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| A PCF8574 I2C 8-bit I/O expander is commonly used to driver LCD displays. | A PCF8574 I2C 8-bit I/O expander is commonly used to driver LCD displays. |
