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Update CARTRIDGE_PINOUT.md

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Lukas Höppner
2026-08-19 16:12:09 +02:00
parent 03aae62f0b
commit 272619c2b8
1 changed files with 10 additions and 10 deletions
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CARTRIDGE_PINOUT.md
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@@ -25,8 +25,8 @@ A concise 32-pin cartridge interface for expansion modules, storage, I/O, and op
| 4 | USB_FLAG | USB-capable flag | pull-up |
| 5 | USB_DP | USB D+ | pull-down |
| 6 | USB_DM | USB D- | pull-down |
| 7 | USB_ID | USB host/device mode | pull-up |
| 8 | USB_VBUS | VBUS sense / optional power | pull-down |
| 7 | | | |
| 8 | | | |
| 9 | SD_CMD | SDMMC command / host->cartridge control | pull-up |
| 10 | SD_CLK | SDMMC clock / host->cartridge | pull-down |
| 11 | SD_D0 | SDMMC data0 (bi-directional) | pull-up |
@@ -35,11 +35,11 @@ A concise 32-pin cartridge interface for expansion modules, storage, I/O, and op
| 14 | SD_D3 | SDMMC data3 (bi-directional) | pull-up |
| 15 | I2C_SCL | I2C clock | pull-up |
| 16 | I2C_SDA | I2C data | pull-up |
| 17 | I2S_SCLK | I2S bit clock | pull-down |
| 18 | I2S_WS | I2S word select / frame clock | pull-down |
| 19 | I2S_SDOUT | I2S data out (cartridge->host) | pull-down |
| 20 | I2S_SDIN | I2S data in (host->cartridge) | pull-down |
| 21 | I2S_MCLK | I2S master clock | pull-down |
| 17 | | | |
| 18 | I2S_WS | I2S word select | pull-down |
| 19 | I2S_SD | I2S data out | pull-down |
| 20 | I2S_SCK | I2S clock | pull-down |
| 21 | I2S_MCLK | I2S master clock | |
| 22 | SPI_MOSI | SPI MOSI (host->cartridge) | pull-down |
| 23 | SPI_MISO | SPI MISO (cartridge->host) | pull-down |
| 24 | SPI_SCLK | SPI clock (host->cartridge) | pull-down |
@@ -50,15 +50,15 @@ A concise 32-pin cartridge interface for expansion modules, storage, I/O, and op
| 29 | UART_TX | UART TX (cartridge->host) | pull-up |
| 30 | VCC_5V | supply | N/A |
| 31 | GND | ground | grounded |
| 30 | 5V_EXT | external power supply (optional) | N/A |
| 30 | EXT_5V | external power supply (optional) | N/A |
## Signal Groups
- Ground: pins 1, 31
- 3.3V supply: pin 2
- Cartridge detection: pin 3
- USB flag: pin 4
- USB: pins 5-8
- USB detection: pin 4
- USB: pins 5-6
- SDMMC: pins 9-14
- I2C: pins 15-16
- I2S audio: pins 17-21