INIT1 (DDRC) Register

Zynq UltraScale+ Devices Register Reference (UG1087)

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

INIT1 (DDRC) Register Description

Register NameINIT1
Offset Address0x00000000D4
Absolute Address 0x00FD0700D4 (DDRC)
Width32
TyperwNormal read/write
Reset Value0x00000000
DescriptionSDRAM Initialization Register 1

This register is static. Static registers can only be written when the controller is in reset.

INIT1 (DDRC) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
dram_rstn_x102424:16rwNormal read/write0x0DDR3/DDR4/LPDDR4: Number of cycles to assert SDRAM reset signal during init sequence. This should be set to a minimum of 1
final_wait_x3214:8rwNormal read/write0x0Cycles to wait after completing the SDRAM initialization sequence before starting the dynamic scheduler.
Unit: Counts of a global timer that pulses every 32 clock cycles.
There is no known specific requirement for this; it may be set to zero.
pre_ocd_x32 3:0rwNormal read/write0x0Wait period before driving the OCD complete command to SDRAM.
Unit: Counts of a global timer that pulses every 32 clock cycles.
There is no known specific requirement for this; it may be set to zero.