Visible to Intel only — GUID: sfo1410069972586
Ixiasoft
Visible to Intel only — GUID: sfo1410069972586
Ixiasoft
26.3.4.2. Dedicated Configuration Registers
Configuration registers for each dedicated I/O pin allow software to control the corresponding I/O cell. These registers, configuration_dedicated_io_1 through configuration_dedicated_io_17, allow software to set the following characteristics:
- Termination
- Slew rate
- Input buffer settings
These registers are not affected by a warm reset.
One configuration register, configuration_dedicated_io_bank, is also provided to select the I/O voltage for the dedicated I/O bank. At cold reset this register defaults to 0x2 (2.5-3.0 volt operation). This register is not affected by a warm reset.
Typically, the boot code programs this register when the system boots up. The boot code reads the BOOTSEL0, BOOTSEL1, and BOOTSEL2 pins and then sets the dedicated I/O bank to either 1.8 or 2.5-3.0 volt operation, depending on the pin status.