GPIO Extension
As the two LEDs and buttons on the Zoom board cannot be used via normal GPIO, but are connected via the I²C expander bus, an additional board was produced for the J30 connector.
It should be noted that the pins of the OMAP processor are multiplexed, i.e. the GP0[2] used on the additional board is also a pin of the McBSP etc. If the McBSP is also to be used, this pin may not be configured as a GPIO.
| I/0 | pin | alternative function |
|---|
| GP0[0] | 92 | AXR8 / CLKS1 / ECAP1_APWM1 |
| GP0[1] | 81 | AXR9 / DX1 |
| GP0[2] | 23 | AXR10 / DR1 |
| GP0[6] | 17 | AXR14 / CLKR1 |
| GP0[13] | 73 | AFSR |
| GP0[15] | 77 | ACLKR |
Schema ZusatzboardSchematics.pdf
