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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 239 -
Revision V1.30
NUC97
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[16:12]
tRFC
AUTO REFRESH Period
This timing defines the minimum delay latency from AUTO-REFRESH command to any other
command.
tRFC = tHCLK * (tRFC+1).
HCLK: It’s the operating clock of SDRAM controller.
[11:8]
tRAS
ACTIVE to PRECHARGE Command Delay
This timing defines the minimum delay latency from a valid ACTIVE command to PRECHARGE
command.
tRAS = tHCLK * (tRAS+1).
HCLK: It’s the operating clock of SDRAM controller.
[7:5]
tRCD
Active to READ or WRITE Delay
This timing defines the minimum delay latency from a ACTIVE command to READ or WRITE
command.
tRCD = tHCLK * (tRCD+1).
HCLK: It’s the operating clock of SDRAM controller.
[4:2]
tRP
PRECHARGE Command Period
This timing defines the minimum delay latency from PRECHARGE command to any other
command.
tRP = tHCLK * (tRP+1).
HCLK: It’s the operating clock of SDRAM controller.
[1:0]
tWR
WRITE Recovery Time
This timing defines the minimum delay latency from last valid write data to PRECHARGE
command.
tWR = tHCLK * (tWR+1).
HCLK: It’s the operating clock of SDRAM controller.