emac_global 

         Controls the L3 master ARCACHE and AWCACHE AXI signals.
These register bits should be updated only during system initialization prior to removing the peripheral from reset. They may not be changed dynamically during peripheral operation
All fields are reset by a cold or warm reset.
Module Instance Base Address Register Address
i_sys_mgr_core 0xFFD12000 0xFFD12040

Size: 32

Offset: 0x40

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

ptp_clk_sel

RW 0x0

emac_global Fields

Bit Name Description Access Reset
0 ptp_clk_sel 
Selects the source of the PTP reference clock between emac_ptp_clk from the Clock Manager or f2s_ptp_ref_clk from the FPGA Fabric.
Value Description
0 emac_ptp_clk
1 f2s_ptp_ref_clk
RW 0x0