Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
General (GENERAL) – Offset 208
General Register
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31 | 0h | RW | sda_mux_sel (sda_mux_sel) sda_mux_sel, 1 = SW override, 0 = native mode |
| 30 | 0h | RW | sda_signal_state (sda_signal_state) sda_signal_state, sda line control from SW reg (0 high impedance, 1 output driver enabled (drives |
| 29 | 0h | RW | scl_mux_sel (scl_mux_sel) scl_mux_sel, 1= SW override, 0 = native mode |
| 28 | 0h | RW | scl_signal_state (scl_signal_state) scl_signal_state, scl line control from SW reg (0 high impedance, 1 output driver enabled (drives low)) |
| 27 | 0h | RO | i2c_sda_rd_pre_drive (i2c_sda_rd_pre_drive) i2c_sda_rd_pre_drive, sda line control from IP (0 high impedance, 1 output driver enabled (drives low)) |
| 26 | 1h | RO | i2c_sda_rd_post_drive (i2c_sda_rd_post_drive) i2c_sda_rd_post_drive, sda line state (0 output drives low, 1 high impedance) |
| 25 | 0h | RO | i2c_scl_rd_pre_drive (i2c_scl_rd_pre_drive) i2c_scl_rd_pre_drive, scl line control from IP (0 high impedance, 1 output driver enabled (drives low)) |
| 24 | 1h | RO | i2c_scl_rd_post_drive (i2c_scl_rd_post_drive) i2c_scl_rd_post_drive, scl line state (0 output drives low, 1 high impedance) |
| 23:5 | 0h | RO | Reserved |
| 4 | 0h | RW | tx_lastbyte_flag (tx_lastbyte_flag) The TX Completion function provides a separate capability to generate a TX |
| 3 | 0h | RW | io_voltage_select (io_voltage_select) io voltage select bit in i2c GENERAL reg |
| 2 | 0h | RW | i2c_ltr_mode (i2c_ltr_mode) i2c ltr mode bit in i2c GENERAL reg |
| 1:0 | 0h | RO | Reserved |