PGCR7 (DDR_PHY) Register

Zynq UltraScale+ Devices Register Reference (UG1087)

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

PGCR7 (DDR_PHY) Register Description

Register NamePGCR7
Offset Address0x000000002C
Absolute Address 0x00FD08002C (DDR_PHY)
Width32
TypemixedMixed types. See bit-field details.
Reset Value0x00000000
DescriptionPHY General Configuration Register 7

PGCR7 (DDR_PHY) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Reserved31:8roRead-only0x0Reserved. Return zeroes on reads.
ACRSVD_7_6 7:6rwNormal read/write0x0These bits are reserved for future AC special PHY modes but the
registers are already connected to existing (unused) AC phy_mode
bits.
ACCALCLK 5rwNormal read/write0x0AC Calibration Clock Select: Valid values are:
1b0 = ddr_clk (x4 clock) is used for delay line calibration
1b1 = ctl_clk (x1 clock) is used for delay line calibration
ACRCLKMD 4rwNormal read/write0x0AC read Clock Mode: Valid values are:
1b0 = Read clock (ctl_rd_clk) is generated from AC ctl_rd_clk pin
1b1 = Read clock (ctl_rd_clk) is generated from AC ctl_clk pin
ACDLDT 3rwNormal read/write0x0AC DDL Load Type: Specifies how the delay select signal is applied to
the AC delay lines. This is only applicable to DDLs that have their
delay select signals pipelined, such address/command LCDL
1b0 = Apply the delay select signal to the delay line only when the
delay select load signal is active and by first loading the delay select
into the pipeline register
1b1 = Apply the delay select signal to the delay line directly, bypassing
any pipeline registers and ignoring the delay select load signal
ACRSVD_2 2rwNormal read/write0x0This bit is reserved for future AC special PHY modes but the register is
already connected to existing (unused) AC phy_mode bits.
ACDTOSEL 1rwNormal read/write0x0AC Digital Test Output Select: This is used to select the AC internal
signals that should be driven on the two AC digital test outputs
(phy_status[1:0]) signals.
Valid values for AC digital test output bit 0 (phy_status[0]) are:
1b0 = Reserved
1b1 = Controller delayed clock (after the LCDL delay) - ctl_dly_clk
Valid values for digital test out bit 1[1] (phy_status[1]) are:
1b0 =Reserved
1b1 = DDR delayed clock (after the LCDL delay) -ddr_dly_clk
ACTMODE 0rwNormal read/write0x0AC Test Mode: This is used to enable special test mode in the AC
macro. Valid values are:
1b0 = Normal mode
1b1 = Test mode