PTR1 (DDR_PHY) Register

Zynq UltraScale+ Devices Register Reference (UG1087)

Document ID
UG1087
Release Date
2024-03-13
Revision
1.10

PTR1 (DDR_PHY) Register Description

Register NamePTR1
Offset Address0x0000000044
Absolute Address 0x00FD080044 (DDR_PHY)
Width32
TypemixedMixed types. See bit-field details.
Reset Value0xD05612C0
DescriptionPHY Timing Register 1

PTR1 (DDR_PHY) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
tPLLLOCK31:16rwNormal read/write0xD056PLL Lock Time: Number of ctl_clk cycles for the PLL to stabilize and lock,
i.e. number of clock cycles from when the PLL reset pin is de-asserted to
when the PLL has lock and is ready for use.
The default value, 0d53334, is set for 100uS at CTL_CLK = 533 MHz and
may be changed to a value that meets, or exceeds, the PLL Lock time,
Tlock = 25us.
Reserved15:13roRead-only0x0Returns zeroes on reads.
tPLLRST12:0rwNormal read/write0x12C0PLL Reset Time: Number of ctl_clk cycles that the PLL must remain in
reset mode, i.e. number of clock cycles from when PLL power-down pin is
de-asserted and PLL reset pin is asserted to when PLL reset pin is de-
asserted. This must correspond to a value that is equal to or more than
9us. Default value corresponds to 9us.