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AMS73CAG02408RAUJI9E 数据表(PDF) 9 Page - Advanced Monolithic Systems Ltd

部件名 AMS73CAG02408RAUJI9E
功能描述  HIGH PERFORMANCE 1Gbit DDR3 SDRAM
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制造商  AMS [Advanced Monolithic Systems Ltd]
网页   http://www.ams-semitech.com
标志 AMS - Advanced Monolithic Systems Ltd

AMS73CAG02408RAUJI9E 数据表(HTML) 9 Page - Advanced Monolithic Systems Ltd

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AMS73CAG01808RA Rev. 1.0 December 2010
Mode Register MR2
The Mode Register MR2 stores the data for controlling refresh related features, RTT_WR impedance and
CAS write latency (CWL). The Mode Register 2 is written by asserting low on CS, RAS, CAS, WE, high on
BA1, low on BA0 and BA2, while controlling the states of address pins according to the table below.
Mode Register 2
Address Field
BA
1
BA
0
A
11
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
1
A13
0*1
BA
2
0*1
A
12
PASR*2
A2 A1 A0
Partial Array Self Refresh (Optional)
000
Full Array
0
0
1
HalfArray (BA[2:0]=000,001,010, &011)
0
1
0
Quarter Array (BA[2:0]=000, & 001)
0
1
1
1/8th Array (BA[2:0] = 000)
1
0
0
3/4 Array (BA[2:0] = 010,011,100,101,110, & 111)
1
0
1
HalfArray (BA[2:0] = 100, 101, 110, &111)
1
1
0
Quarter Array (BA[2:0]=110, &111)
1
1
1
1/8th Array (BA[2:0]=111)
* 1 : BA2, A8, A11 ~ A13 are RFU and must be programmed to 0 during MRS.
* 2 : The Rtt_WR value can be applied during writes even when Rtt_Nom is disabled.
During write leveling, Dynamic ODT is not available.
SRT
A5 A4 A3
CAS write Latency (CWL)
00
0
5 (tCK(avg)
≥2.5ns)
0
0
1
6 (2.5ns
>tCK(avg) ≥1.875ns)
01
0
7 (1.875ns
>tCK(avg) ≥1.5ns)
01
1
8 (1.5ns
>tCK(avg) ≥1.25ns)
1
0
0
Reserved
1
0
1
Reserved
1
1
0
Reserved
1
1
1
Reserved
A7
Self-refresh temperature range (SRT)
0
Normal operating temperature range
1
Extend temperature self-refresh (Optional)
0*1
Rtt_WR
A10 A9
Rtt_WR *2
00
Dynamic ODT off
(Write does not affect Rtt value)
01
RZQ/4
10
RZQ/2
1
1
Reserved
BA1
BA0
MRS mode
00
MR0
01
MR1
10
MR2
11
MR3
0
CWL
ASR
A6
Auto Self-refresh (ASR)
0
1
ASR enable (Optional)
Manual SR Reference (SRT)
AMS73CAG01808RA


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