MT47H512M4 datasheet(81/134 Pages) MICRON

部件名	MT47H512M4

功能描述	DDR2 SDRAM MT47H512M4 ??64 Meg x 4 x 8 banks MT47H256M8 ??32 Meg x 8 x 8 banks MT47H128M16 ??16 Meg x 16 x 8 banks

Download	134 Pages

Scroll/Zoom	100%

制造商	MICRON [Micron Technology]

网页	http://www.micron.com

标志

81 / 134 page

CAS Latency (CL)

The CAS latency (CL) is defined by bits M4–M6, as shown in Figure 36 (page 78). CL is

the delay, in clock cycles, between the registration of a READ command and the availa-

bility of the first bit of output data. The CL can be set to 3, 4, 5, 6, or 7 clocks, depending

on the speed grade option being used.

DDR2 SDRAM does not support any half-clock latencies. Reserved states should not be

used as an unknown operation otherwise incompatibility with future versions may re-

sult.

DDR2 SDRAM also supports a feature called posted CAS additive latency (AL). This fea-

ture allows the READ command to be issued prior to tRCD (MIN) by delaying the inter-

nal command to the DDR2 SDRAM by AL clocks. The AL feature is described in further

detail in Posted CAS Additive Latency (AL) (page 84).

Examples of CL = 3 and CL = 4 are shown in Figure 37; both assume AL = 0. If a READ

command is registered at clock edge n, and the CL is m clocks, the data will be available

nominally coincident with clock edge n + m (this assumes AL = 0).

Figure 37: CL

DO

n + 3

DO

n + 2

DO

n + 1

CK

CK#

Command

DQ

DQS, DQS#

CL = 3 (AL = 0)

READ

T0

T1

T2

Don’t care

Transitioning data

NOP

DO

n

T3

T4

T5

NOP

T6

NOP

DO

n + 3

DO

n + 2

DO

n + 1

CK

CK#

Command

DQ

DQS, DQS#

CL = 4 (AL = 0)

READ

T0

T1

T2

NOP

DO

n

T3

T4

T5

NOP

T6

NOP

Notes:

1. BL = 4.

2. Posted CAS# additive latency (AL) = 0.

3. Shown with nominal tAC, tDQSCK, and tDQSQ.

2Gb: x4, x8, x16 DDR2 SDRAM

Mode Register (MR)

PDF: 09005aef824f87b6

2Gb_DDR2.pdf – Rev. H 10/11 EN

81

Micron Technology, Inc. reserves the right to change products or specifications without notice.

类似零件编号 - MT47H512M4

制造商	部件名	数据表	功能描述
Micron Technology	MT47H512M4	1Mb / 134P	2Gb: x4, x8, x16 DDR2 SDRAM Features

More results

类似说明 - MT47H512M4

制造商	部件名	数据表	功能描述
Micron Technology	MT47H128M16RT-25EC	1Mb / 134P	DDR2 SDRAM MT47H512M4 ??64 Meg x 4 x 8 banks MT47H256M8 ??32 Meg x 8 x 8 banks MT47H128M16 ??16 Meg x 16 x 8 banks
	MT47H64M16HR-25EITH	9Mb / 134P	DDR2 SDRAM MT47H256M4 ??32 Meg x 4 x 8 banks MT47H128M8 ??16 Meg x 8 x 8 banks MT47H64M16 ??8 Meg x 16 x 8 banks
	MT47H64M16HR-25H	1Mb / 132P	DDR2 SDRAM MT47H256M4 ??32 Meg x 4 x 8 banks MT47H128M8 ??16 Meg x 8 x 8 banks MT47H64M16 ??8 Meg x 16 x 8 banks
	MT41J64M16JT-125G	2Mb / 214P	DDR3 SDRAM MT41J256M4 ??32 Meg x 4 x 8 banks MT41J128M8 ??16 Meg x 8 x 8 banks MT41J64M16 ??8 Meg x 16 x 8 banks
	MT41J128M16HA-15ED	2Mb / 211P	DDR3 SDRAM MT41J512M4 ??64 Meg x 4 x 8 Banks MT41J256M8 ??32 Meg x 8 x 8 Banks MT41J128M16 ??16 Meg x 16 x 8 Banks
	MT41J128M16JT-125K	2Mb / 211P	DDR3 SDRAM MT41J512M4 64 Meg x 4 x 8 Banks MT41J256M8 32 Meg x 8 x 8 Banks MT41J128M16 16 Meg x 16 x 8 Banks
	MT41J128M16HA-15EDTR	2Mb / 211P	DDR3 SDRAM MT41J512M4 ??64 Meg x 4 x 8 Banks MT41J256M8 ??32 Meg x 8 x 8 Banks MT41J128M16 ??16 Meg x 16 x 8 Banks
	MT47H64M8CF-25EG	9Mb / 132P	DDR2 SDRAM MT47H128M4 ??32 Meg x 4 x 4 banks MT47H64M8 ??16 Meg x 8 x 4 banks MT47H32M16 ??8 Meg x 16 x 4 banks
	MT48LC32M16A2P-75ITC	3Mb / 77P	SDR SDRAM MT48LC128M4A2 ??32 Meg x 4 x 4 banks MT48LC64M8A2 ??16 Meg x 8 x 4 banks MT48LC32M16A2 ??8 Meg x 16 x 4 banks
	MT48LC16M16A2P-75DTR	3Mb / 86P	SDR SDRAM MT48LC64M4A2 ??16 Meg x 4 x 4 banks MT48LC32M8A2 ??8 Meg x 8 x 4 banks MT48LC16M16A2 ??4 Meg x 16 x 4 banks

More results

MT47H512M4 数据表(PDF) 81 Page - Micron Technology

MT47H512M4 数据表(HTML) 81 Page - Micron Technology

类似零件编号 - MT47H512M4

类似说明 - MT47H512M4

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载

链接网址

MT47H512M4 数据表(PDF) 81 Page - Micron Technology

MT47H512M4 数据表(HTML) 81 Page - Micron Technology

类似零件编号 - MT47H512M4

类似说明 - MT47H512M4

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表 下载

链接网址

数据表下载