NT5CB128M8GP-EKB datasheet(43/160 Pages) NANYA

43 / 160 page

Version 2.2

Nanya Technology Cooperation ©

04/2019

NTC Proprietary

Level: Property

DDR3(L) 1Gb SDRAM

NT5CB(C)128M8GN / NT5CB(C)64M16GP

Timing details of Write leveling sequence (For Information. Only Support prime DQ)

DQS -

 is capturing CK -  low at T1 and CK - 

high at T2

NOP

CMD

ODT

Di ff_ DQS

Prime DQ

Late

Re ma ini ng

DQs

tMOD

tWLMR D

tWLO

tWLS

t WLH

tWLOE

tWLS

t WLH

t WLO

NOP

M RS

tDQSH

tDQSL

tDQSH

t DQSL

Time

break

Do not

Care

On e Pri me DQ:

Earl y

Re ma ini ng

DQs

tWLO

t WLO

Undefined

Driving Mode

tWLOE

tWLO

t WLO

All DQs are Prime :

Late

Re ma ini ng

DQs

Earl y

Re ma ini ng

DQs

tWLMRD

tWLO

t WLO

t WLOE

tWLDQSEN

NOP

Note:

1. DRAM has the option to drive leveling feedback on a prime DQ or all DQs. If feedback is driven only on

one DQ, the remaining DQs must be driven low as shown in above Figure, and maintained at this state

through out the leveling procedure.

2. MRS: Load MR1 to enter write leveling mode

3. NOP: NOP or deselect

4. diff_DQS is the differential data strobe (DQS,

). Timing reference points are the zero crossings. DQS

is shown with solid line,

 is shown with dotted line.

6. DQS/

 needs to fulfill minimum pulse width requirements tDQSH(min) and tDQSL(min) as defined for

regular Writes; the max pulse width is system dependent.

Write Leveling Mode Exit

The following sequence describes how Write Leveling Mode should be exited:

1. After the last rising strobe edge (see ~T0), stop driving the strobe signals (see ~Tc0). Note: From now on, DQ pins are in

undefined driving mode, and will remain undefined, until tMOD after the respective MR command (Te1).

2. Drive ODT pin low (tIS must be satisfied) and keep it low (see Tb0).

3. After the RTT is switched off, disable Write Level Mode via MRS command (see Tc2).

4. After tMOD is satisfied (Te1), any valid command may be registered. (MR commands may be issued after tMRD (Td1).

NT5CB128M8GP-EKB Datasheet(PDF) 43 Page - Nanya Technology Corporation.

NT5CB128M8GP-EKB Datasheet(HTML) 43 Page - Nanya Technology Corporation.

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

Datasheet Download

Link URL