{
    "_description": "PTB Kasli variant with backplane adapter and 4 Urukuls",
    "target": "kasli",
    "variant": "ptb3",
    "hw_rev": "v1.1",
    "base": "standalone",
    "ext_ref_frequency": 100e6,
    "peripherals": [
        {
            "type": "dio",
            "ports": [0],
            "bank_direction_low": "input",
            "bank_direction_high": "output"
        },
        {
            "type": "dio",
            "ports": [1],
            "bank_direction_low": "output",
            "bank_direction_high": "output"
        },
        {
            "type": "dio",
            "ports": [2],
            "bank_direction_low": "output",
            "bank_direction_high": "output"
        },
        {
            "type": "sampler",
            "ports": [3]
        },
        {
            "type": "urukul",
            "ports": [5, 4],
            "dds": "ad9912",
            "clk_sel": 1
        },
        {
            "type": "urukul",
            "ports": [6],
            "clk_sel": 1
        },
        {
            "type": "zotino",
            "ports": [7]
        },
        {
            "type": "urukul",
            "ports": [9, 8],
            "dds": "ad9912",
            "clk_sel": 1
        },
        {
            "type": "urukul",
            "ports": [11, 10],
            "clk_sel": 1
        }
   ]
}