2.2.4.5.1 Function
The TZC-400 is dedicated to DDR security settings. As the DDR controller features five client ports and the maximum number of ports on a TZC-400 is four, two TZC-400 controllers are integrated. A 1-port TZC-400 is used between the processor and the DDR, while the other four ports are secured through a 4-port TZC-400. See the following table for the association of TZC ports and DDR ports.
| TZC Controller | TZC Port | DDR Port |
|---|---|---|
| 0 | 0 | Port 1 (TZAESB, QSPI, USB, EBI, ICM) |
| 0 | 1 | Port 2 (DMA0, DMA1) |
| 0 | 2 | Port 3 (LCDC, GPU2DC) |
| 0 | 3 | Port 4 (GMAC[1:0], SDMMC[2:0], DMA2) |
| 1 | 0 | Port 0 (CPU) |