puf_shut (CSU) Register Description
| Register Name | puf_shut |
|---|---|
| Offset Address | 0x000000400C |
| Absolute Address | 0x00FFCA400C (CSU) |
| Width | 32 |
| Type | rwNormal read/write |
| Reset Value | 0x01000020 |
| Description | PUF Configuration 2 |
puf_shut (CSU) Register Bit-Field Summary
| Field Name | Bits | Type | Reset Value | Description |
|---|---|---|---|---|
| soset | 31:24 | rwNormal read/write | 0x1 | Shutter Offset Time. Program this vlaue to 0x01. |
| sopen | 23:0 | rwNormal read/write | 0x20 | Shutter Open Time SOPEN * 16 is the number of PUF clock cycles (200MHz +/-10%) where the "shutter" is open. The oscillator values can be captured only while the "shutter" is open. The minimum valud to program is 0x20, which means that each PUF oscillator is on for 32 PUF clock cycles. A starting recommneded value is between 10us and 40us. The four least significant bits are ignored This should be programmed to 0x0005E, and might be adjusted depending on overflow conditions in STATUS register. |