pin21sel
HPS Pinmux Select for IO21
| Module Instance | Base Address | Register Address |
|---|---|---|
| i_dedio_pinmux_csr | 0xFFD13000 | 0xFFD13054 |
Size: 32
Offset: 0x54
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
|
Reserved |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|
Reserved |
val RW 0x9 |
||||||||||||||
pin21sel Fields
| Bit | Name | Description | Access | Reset |
|---|---|---|---|---|
| 3:0 | val |
Select value determines which interface has been selected for IO21. It also determines the output_enable for the respective interface. Its value can range from 0 to 9. 0000 (0) -- Pin connected to emac0.txd3 0001 (1) -- Pin connected to usb1.data5 0010 (2) -- Pin connected to trace.d1 0011 (3) -- Pin connected to nand.adq13 0100 (4) -- Pin connected to i2c1.scl 0101 (5) -- Pin connected to uart0.rts_n 0110 (6) -- Pin connected to spis0.mosi 0111 (7) -- Pin connected to spim1.mosi 1000 (8) -- Pin connected to gpio0.io21 Note: Platform Designer also programs this encoding value if you select this pin as the clock manager external oscillator input. 1001 (9) -- reserved |
RW | 0x9 |