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S4 control will be enabled on power on sequence or Reset reset (S2-Button), if one of the three S4-DIP switches is set to one.
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S4 control will be disabled on power on sequence or Reset reset (S2-Button), if all of the three S4-DIP switches is set to OFF or older PCB revision is used.
| Note |
|---|
Do not set S4-Switches to ON, if REV05- or I2C control is enabled. |
| S3-M1 | S3-M2 | Description |
|---|---|---|
| OFF | OFF | VADJ: 1.8V |
| OFF | ON | VADJ: 2.5V |
| ON | OFF | VADJ: 3.3V |
| On | ON | I2C controlled |
I2C VADJ Control use TE0701 HDMI I2C Bus (HDMI_SCL and HDMI_SDA) connected to module FPGA PL side.I2C-GPIO controller device address is 0x22.
| Bit | Access | Default | Description |
|---|---|---|---|
| 7 | R/W | 0 | FMC - Enable |
| 6 | R/W | 0 | VID2 |
| 5 | R/W | 0 | VID1 |
| 4 | R/W | 0 | VID0 |
| 3 | R/W | 0 | PG_C2M - Enable |
| 2 | R | x | POK_FMC (EN5335QI Power OK) |
| 1 | R | x | one: I2C Mode, zero: DIP Mode, |
| 0 | R | x | VID Mode (zero: S4-DIP-controlled, one: REV05-/I2C controlled) |
| VID2 | VID1 | VID0 | Description |
|---|---|---|---|
| 0 | 0 | 0 | VADJ: 3.3V |
| 0 | 0 | 1 | VADJ: 2.5V |
| 0 | 1 | 0 | VADJ: 1.8V |
| 0 | 1 | 1 | VADJ: 1.5V |
| 1 | 0 | 0 | VADJ: 1.25V |
| 1 | 0 | 1 | VADJ: 1.2V |
| 1 | 1 | 0 | VADJ: 0.8V |
| 1 | 1 | 1 | reserved |
To read I2C with petalinux use i2cget -y 0 0x22.
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