W631GG6KB12I datasheet(10/158 Pages) WINBOND

Part #	W631GG6KB12I

Description	Double Data Rate architecture: two data transfers per clock cycle

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W631GG6KB

Publication Release Date: Feb. 27, 2013

Revision A04

- 10 -

E3, F7, F2, F8, H3,

H8, G2, H7

DQL0

−DQL7

Input/Output

Data Input/Output: Lower byte of Bi-directional data bus.

D7, C3, C8, C2, A7,

A2, B8, A3

DQU0

−DQU7

Input/Output

Data Input/Output: Upper byte of Bi-directional data bus.

F3, G3

DQSL, DQSL#

Input/Output

Lower byte data Strobe: Data Strobe output with read data, input with

write data of DQL[7:0]. Edge-aligned with read data, centered in write

data. DQSL is paired with DQSL# to provide differential pair signaling

to the system during read and write data transfer. DDR3 SDRAM

supports differential data strobe only and does not support single-

ended.

C7, B7

DQSU, DQSU#

Input/Output

Upper byte data Strobe: Data Strobe output with read data, input with

write data of DQU[7:0]. Edge-aligned with read data, centered in write

data. DQSU is paired with DQSU# to provide differential pair signaling

to the system during read and write data transfer. DDR3 SDRAM

supports differential data strobe only and does not support single-

ended.

B2, D9, G7, K2, K8,

N1, N9, R1, R9

VDD

Supply

Power Supply: 1.5V ± 0.075V.

A9, B3, E1, G8, J2,

J8, M1, M9, P1, P9,

T1, T9

VSS

Supply

Ground.

A1, A8, C1, C9, D2,

E9, F1, H2, H9

VDDQ

Supply

DQ Power Supply: 1.5V ± 0.075V.

B1, B9, D1, D8, E2,

E8, F9, G1, G9

VSSQ

Supply

DQ Ground.

H1

VREFDQ

Supply

Reference voltage for DQ.

M8

VREFCA

Supply

Reference voltage for Control, Command and Address inputs.

L8

ZQ

Supply

External reference ball for output drive and On-Die Termination

Impedance calibration: This ball needs an external 240

Ω ± 1%

external resistor (RZQ), connected from this ball to ground to perform

ZQ calibration.

J1, J9, L1, L9, M7,

T3, T7

NC

No Connect: No internal electrical connection is present.

Note:

Input only balls (BA0-BA2, A0-A12, RAS#, CAS#, WE#, CS#, CKE, ODT and RESET#) do not supply termination.

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