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MT40A512M8RH-083E Datasheet(PDF) 81 Page - Micron Technology

Part # MT40A512M8RH-083E
Description  Programmable data strobe preambles
Download  365 Pages
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Manufacturer  MICRON [Micron Technology]
Direct Link  http://www.micron.com
Logo MICRON - Micron Technology

MT40A512M8RH-083E Datasheet(HTML) 81 Page - Micron Technology

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When the CAL mode is enabled, additional time is required for the MRS command to
complete. The earliest the next valid command can be issued is tMOD_CAL, which
should be equal to tMOD + tCAL. The two following figures are examples.
Figure 25: CAL Enable Timing – tMOD_CAL
T0
T1
Ta0
Ta1
Ta2
CK_c
CK_t
Address
CS_n
Settings
Command
Ta3
Ta4
Old settings
MRS
Valid
DES
DES
DES
DES
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Don’t Care
Time Break
Tb0
Tb1
Tb2
Tb3
New settings
Valid
Valid
Valid
Valid
Valid
tMOD_CAL
tCAL
Updating settings
DES
DES
DES
Note:
1. CAL mode is enabled at T1.
Figure 26: tMOD_CAL, MRS to Valid Command Timing with CAL Enabled
T0
T1
Ta0
Ta1
Ta2
CK_c
CK_t
Address
CS_n
Settings
Command
Tb0
Tb1
Old settings
Valid
DES
DES
DES
DES
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Don’t Care
Time Break
Tb2
Tc0
Tc1
Tc2
New settings
Valid
Valid
Valid
tMOD_CAL
tCAL
tCAL
Updating settings
DES
DES
DES
MRS
Valid
Valid
Note:
1. MRS at Ta1 may or may not modify CAL, tMOD_CAL is computed based on new tCAL set-
ting if modified.
4Gb: x4, x8, x16 DDR4 SDRAM
Command Address Latency
09005aef84af6dd0
4gb_ddr4_dram.pdf - Rev. G 1/17 EN
81
Micron Technology, Inc. reserves the right to change products or specifications without notice.
2014 Micron Technology, Inc. All rights reserved.


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