PT=B_0x0
SPDIFRX data input register
| DR | data value |
| PE | parity error bit |
| V | validity bit |
| U | user bit |
| C | channel status bit |
| PT | preamble type 0 (B_0x0): not used 1 (B_0x1): Preamble B received 2 (B_0x2): Preamble M received 3 (B_0x3): Preamble W received |