SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
The FSI is capable of transmitting and receiving data on two parallel data lines. When enabled, data bits are split between the data lines while the start of frame, frame type, frame tag, and end of frame fields are identical and complete on each line. The user data, data, and CRC fields are split between the data lines. Starting with the most-significant bit, the odd-numbered bits appear on D0 and even-numbered bits appear on D1.
In the following example, assume the following:
8-bit user data: u7u6u5u4u3u2u1u0
16-bit data: d15d14d13d12…d1d0
8-bit CRC: c7c6c5c4c3c2c1c0
Idle State | Preamble | SOF | Frame Type | User Data | Data Words | CRC Byte | Frame Tag | EOF | Postamble | Idle State |
---|---|---|---|---|---|---|---|---|---|---|
TXD0 | 1111 | 1001 | 0011 | u7u5u3u1 | d15d13…d1 | c7c5c3c1 | xxxx | 0110 | 1111 | |
TXD1 | 1111 | 1001 | 0011 | u6u4u2u0 | d14d12…d0 | c6c4c2c0 | xxxx | 0110 | 1111 |