Asserted when a software CSRNG request has completed.

Asserted when a FIFO error occurs.

Enable interrupt when INTR_STATE.edn_cmd_req_done is set.

Enable interrupt when INTR_STATE.edn_fatal_err is set.

Write 1 to force INTR_STATE.edn_cmd_req_done to 1.

Write 1 to force INTR_STATE.edn_fatal_err to 1.

Write 1 to trigger one alert event of this kind.

Write 1 to trigger one alert event of this kind.

When true, the CTRL can be written by software. When false, this field read-only. Defaults true, write zero to clear. Note that this needs to be cleared after initial configuration at boot in order to lock in the listed register settings.

Setting this field to kMultiBitBool4True enables the EDN module. The modules of the entropy complex may only be enabled and disabled in a specific order, see Programmers Guide for details.

Setting this field to kMultiBitBool4True will enable the feature where the EDN block will automatically send a boot-time request to the CSRNG application interface. The purpose of this feature is to request entropy as fast as possible after reset, and during chip boot-time.

Setting this field to kMultiBitBool4True will enable the EDN block to automatically send another request to CSRNG application interface. It is assumed that a CSRNG instantiate command will be issued using the SW_CMD_REQ register interface. When this command has an command ack returned from CSRNG, a new generate command will be send out again without software intervention. It is expected that the generate command will be sent repeatedly so that a continuous supply of entropy can be delivered to the endpoints. Reseed commands will be sent on a programmable basic between generate commands. The GENERATE_CMD, RESEED_CMD, and MAX_NUM_REQS_BETWEEN_RESEEDS registers must set up before the SW_CMD_REQ register command is issued.

Setting this field to kMultiBitBool4True clears the two command FIFOs: the RESEED_CMD FIFO and the GENERATE_CMD FIFO. This field must be set to the reset state by software before any further commands can be issued to these FIFOs.

This field is used as the value for Instantiate command at boot time.

This field is used as the value for generate command at boot time.

Any CSRNG action can be initiated by writing a CSRNG command to this register. The application interface must wait for the "ack" to return before issuing new commands. This interface is intended to be controlled solely by software.

If CTRL.AUTO_REQ_MODE is set, only the first instantiate command has any effect. After that command has been processed, writes to this register register will have no effect on operation. Note that CSRNG command format details can be found in the CSRNG documentation.

This bit indicates when the command interface is ready to accept commands.

This one bit field is the status code returned with the application command ack. It is updated each time a command ack is asserted on the CSRNG interface. 0b0: Request completed successfully 0b1: Request completed with an error

Writing this register will fill a FIFO with up to 13 command words (32b words). This FIFO will be used to automatically send out a reseed command to the CSRNG application interface when in CTRL.AUTO_REQ_MODE. This command will be sent only after the MAX_NUM_REQS_BETWEEN_RESEEDS counter value has reached zero.

If more than 13 entires are written to the FIFO, the design will automatically generate a fatal alert.

Note that CSRNG command format details can be found in the CSRNG documentation.

Writing this register will fill a FIFO with up to 13 command words (32b words). This FIFO will be used to automatically send out a generate command to the CSRNG appl interface when in CTRL.AUTO_REQ_MODE. This command will be sent only after receiving a command ack from the previous command.

If more than 13 entires are written to the FIFO, the design will automatically generate a fatal alert.

Note that CSRNG command format details can be found in the CSRNG documentation.

Setting this field will set the number of generate requests that can be made to CSRNG before a reseed request is made. This value only has meaning when in CTRL.AUTO_REQ_MODE. This register supports a maximum of 2^32 requests between reseeds. This register will be used by a counter that counts down, triggering an automatic reseed when it reaches zero.

This bit is set when the EDN_ENABLE field is set to an illegal value, something other than kMultiBitBool4True or kMultiBitBool4False. Writing a zero resets this status bit.

This bit is set when the BOOT_REQ_MODE field is set to an illegal value, something other than kMultiBitBool4True or kMultiBitBool4False. Writing a zero resets this status bit.

This bit is set when the CTRL.AUTO_REQ_MODE field is set to an illegal value, something other than kMultiBitBool4True or kMultiBitBool4False. Writing a zero resets this status bit.

This bit is set when the CMD_FIFO_RST field is set to an illegal value, something other than kMultiBitBool4True or kMultiBitBool4False. Writing a zero resets this status bit.

This bit is set when the interal entropy bus value is equal to the prior valid value on the bus, indicating a possible attack. Writing a zero resets this status bit.

This bit will be set to one when an error has been detected for the reseed command FIFO. The type of error is reflected in the type status bits (bits 28 through 30 of this register). When this bit is set, a fatal error condition will result.

This bit will be set to one when an error has been detected for the generate command FIFO. The type of error is reflected in the type status bits (bits 28 through 30 of this register). When this bit is set, a fatal error condition will result. This bit will stay set until the next reset.

This bit will be set to one when an error has been detected for the output FIFO. The type of error is reflected in the type status bits (bits 28 through 30 of this register). When this bit is set, a fatal error condition will result.

This bit will be set to one when an illegal state has been detected for the EDN ack stage state machine. This error will signal a fatal alert. This bit will stay set until the next reset.

This bit will be set to one when an illegal state has been detected for the EDN main stage state machine. This error will signal a fatal alert. This bit will stay set until the next reset.

This bit will be set to one when a hardened counter has detected an error condition. This error will signal a fatal alert. This bit will stay set until the next reset.

This bit will be set to one when any of the source bits (bits 0 through 1 of this this register) are asserted as a result of an error pulse generated from any full FIFO that has been recieved a write pulse. This bit will stay set until the next reset.

This bit will be set to one when any of the source bits (bits 0 through 1 of this this register) are asserted as a result of an error pulse generated from any empty FIFO that has recieved a read pulse. This bit will stay set until the next reset.

This bit will be set to one when any of the source bits (bits 0 through 1 of this this register) are asserted as a result of an error pulse generated from any FIFO where both the empty and full status bits are set. This bit will stay set until the next reset.

Setting this field will set the bit number for which an error will be forced in the hardware. This bit number is that same one found in the ERR_CODE register. The action of writing this register will force an error pulse. The sole purpose of this register is to test that any error properly propagates to either an interrupt or an alert.

This is the state of the EDN main state machine. See the RTL file edn_main_sm for the meaning of the values.