.. _rb_clk_info: ========================= Clock info register block ========================= The clock info register block has a header with type 0x0000C008, version 0x00000100, and contains information about clocks in the design. .. table:: =========== ============= ====== ====== ====== ====== ============= Address Field 31..24 23..16 15..8 7..0 Reset value =========== ============= ====== ====== ====== ====== ============= RBB+0x00 Type Vendor ID Type RO 0x0000C008 ----------- ------------- -------------- -------------- ------------- RBB+0x04 Version Major Minor Patch Meta RO 0x00000100 ----------- ------------- ------ ------ ------ ------ ------------- RBB+0x08 Next pointer Pointer to next register block RO - ----------- ------------- ------------------------------ ------------- RBB+0x0C Channel count Channel count RO - ----------- ------------- ------------------------------ ------------- RBB+0x10 Ref period Ref per num Ref per denom RO - ----------- ------------- -------------- -------------- ------------- RBB+0x18 Clk period Clk per num Clk per denom RO - ----------- ------------- -------------- -------------- ------------- RBB+0x1C Clk freq Core clock frequency (Hz) RO - ----------- ------------- ------------------------------ ------------- RBB+0x20+4n Channel freq Channel clock frequency (Hz) RO - =========== ============= ============================== ============= See :ref:`rb_overview` for definitions of the standard register block header fields. .. object:: Channel count The channel count field contains the number of clocks, excluding the core and reference clocks. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x0C Channel count RO - ======== ============================== ============= .. object:: Reference clock period The reference clock period field contains the nominal period of the reference clock in nanoseconds as a fractional value, consisting of a 16-bit numerator and a 16-bit denominator. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x10 Ref per num Ref per denom RO - ======== ============== ============== ============= .. object:: Core clock period The core clock period field contains the nominal period of the core clock in nanoseconds as a fractional value, consisting of a 16-bit numerator and a 16-bit denominator. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x18 Clk per num Clk per denom RO - ======== ============== ============== ============= .. object:: Core clock frequency The core clock frequency field contains the measured core clock frequency in Hz, measured relative to the reference clock. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x1C Core clock frequency (Hz) RO - ======== ============================== ============= .. object:: Channel clock frequency The channel clock frequency fields contain the measured channel clock frequency in Hz, measured relative to the reference clock. There is one register per channel. .. table:: =========== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value =========== ====== ====== ====== ====== ============= RBB+0x20+4n Channel clock frequency (Hz) RO - =========== ============================== =============