AMBA APB Revisions
| APB2 | APB3 | APB4 | Signal Direction |
|---|---|---|---|
| PADDR[31:0] | PADDR[31:0] | PADDR[31:0] | MoSi |
| PRPOT[2:0] | MoSi | ||
| PSEL | PSEL | PSEL | MoSi |
| PENABLE | PENABLE | PENABLE | MoSi |
| PWRITE | PWRITE | PWRITE | MoSi |
| PWDATA[31:0] | PWDATA[31:0] | PWDATA[31:0] | MoSi |
| PSTRB[3:0] | MoSi | ||
| PREADY | PREADY | SoMi | |
| PRDATA[31:0] | PRDATA[31:0] | PRDATA[31:0] | SoMi |
| PSLVERR | PSLVERR | SoMi |