MT41J64M16JT-15E AIT:G Micron, MT41J64M16JT-15E AIT:G Datasheet - Page 168

• Manufacturer Part Number: MT41J64M16JT-15E AIT:G
• Description: DRAM Chip DDR3 SDRAM 1G-Bit 64Mx16 1.5V 96-Pin FBGA
• Manufacturer: Micron

Extended Temperature Usage
Table 73: Self Refresh Temperature and Auto Self Refresh Description
Table 74: Self Refresh Mode Summary
PDF: 09005aef84491df3
1Gb_AIT_AAT_DDR3_SDRAM.pdf – Rev. C 8/11 EN
Field
Self Refresh Temperature (SRT)
Auto Self Refresh (ASR)
MR2[6]
(ASR)
ASR
SRT
0
0
1
1
MR2[7]
MR2 Bits
(SRT)
0
1
0
1
7
6
SELF REFRESH Operation
Self refresh mode is supported in the normal temperature
range
Self refresh mode is supported in normal and extended temper-
ature ranges; When SRT is enabled, it increases self refresh
power consumption
Self refresh mode is supported in normal and extended temper-
ature ranges; Self refresh power consumption may be tempera-
ture-dependent
Illegal
Description
If ASR is disabled (MR2[6] = 0), SRT must be programmed to indicate T
*MR2[7] = 0: Normal operating temperature range (0°C to 85°C)
*MR2[7] = 1: Extended operating temperature range (0°C to 95°C)
If ASR is enabled (MR2[7] = 1), SRT must be set to 0, even if the extended temperature range is
supported
*MR2[7] = 0: SRT is disabled
When ASR is enabled, the DRAM automatically provides SELF REFRESH power management func-
tions, (refresh rate for all supported operating temperature values)
* MR2[6] = 1: ASR is enabled (M7 must = 0)
When ASR is not enabled, the SRT bit must be programmed to indicate T
operation
* MR2[6] = 0: ASR is disabled; must use manual self refresh temperature (SRT)
Micron’s DDR3 SDRAM support the optional extended case temperature (T
0°C to 95°C. Thus, the SRT and ASR options must be used at a minimum.
The extended temperature range DRAM must be refreshed externally at 2x (double re-
fresh) anytime the case temperature is above 85°C (and does not exceed 95°C). The ex-
ternal refresh requirement is accomplished by reducing the refresh period from 64ms to
32ms. However, self refresh mode requires either ASR or SRT to support the extended
temperature. Thus, either ASR or SRT must be enabled when T
refresh cannot be used until T
ded temperature options and Table 74 summarizes how the two extended temperature
options relate to one another.
168
C
is at or below 85°C. Table 73 summarizes the two exten-
1Gb: x8, x16 Automotive DDR3 SDRAM
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Extended Temperature Usage
Permitted Operating Temperature
Range for Self Refresh Mode
Normal (0°C to 85°C)
Normal and extended (0°C to 95°C)
Normal and extended (0°C to 95°C)
OPER
‹ 2010 Micron Technology, Inc. All rights reserved.
C
OPER
is above 85°C or self
during self refresh:
during SELF REFRESH
C
) range of