3.4.5. DCC_AID Register
The DCC_AID Register characteristics are:
- Purpose
-
The Daughterboard Configuration Controller reads this information and uses it to determine the number of DCC_CFGx registers, and the registers that are supported that can be read from the motherboard SYS-CFG register interface. If this register is not implemented, the Daughterboard Configuration Controller does not support user switches or LEDs, lock, or
user config
commands.If a SCC interface is not implemented in the FPGAs, the FPGA CFGDATAOUT signal must be pulled to a logic LOW to signal to the Daughterboard Configuration Controller that no data is transferred.
- Usage constraints
-
There are no usage constraints.
- Configurations
-
Available in all LogicTile Express 20MG configurations.
- Attributes
Figure 3.5 shows the bit assignments.
Table 3.6 shows the bit assignments.
Bits | Name | Function |
---|---|---|
[31:24] | Build | FPGA build number. |
[23:16] | - | Reserved. |
[15:11] | - | Reserved. |
[10] | SW_ENABLE | This bit indicates whether the DCC_SW_READ command is supported. |
[9] | LED_ENABLE | This bit indicates whether the DCC_LED_READ command is supported. |
[8] | LOCK_ENABLE | This bit indicates whether the DCC_LOCK_READ command is supported. |
[7:0] | CFGREGNUM | These bits indicate the number of user config commands. The maximum number supported is 64. |