HBD-E385, HBD-E390, HBD-T39 - Sony Audio Service Manual (repair manual). Page 73

A1

VDDQ

-

DQ Power Supply: 1.5V +/-0.075V

A2

DQU5

I/O

Data Input/output: Bi-directional data bus.

A3

DQU7

I/O

Data Input/output: Bi-directional data bus.

A4

NO_USE

-

Not used

A5

NO_USE

-

Not used

A6

NO_USE

-

Not used

A7

DQU4

I/O

Data Input/output: Bi-directional data bus.

A8

VDDQ

-

DQ Power Supply: 1.5V +/-0.075V

A9

VSS

-

Ground

B1

VSSQ

-

DQ Ground

B2

VDD

-

Power Supply: 1.5V +/-0.075

B3

VSS

-

Ground

B4

NO_USE

-

Not used

B5

NO_USE

-

Not used

B6

NO_USE

-

Not used

B7

DQSU

I/O

Data Strobe: Output with read data, input with write data. Edge-aligned with read data,
centered in write data. For the x16, DQSL: corresponds to the data on DQL0-DQL7; DQSU 
corresponds to the data on DQU0-DQU7. The data strobe DQS, DQSL and DQSU are paired 
with differential signals DQS, DQSL and DQSU, respectively, to provide differential pair 
signaling to the system during reads and writes. DDR3 SDRAM supports differential data 
strobe only and does not support single-ended.

B8

DQU6

I/O

Data Input/output: Bi-directional data bus.

B9

VSSQ

-

DQ Ground

C1

VDDQ

-

DQ Power Supply: 1.5V +/-0.075V

C2

DQU3

I/O

Data Input/output: Bi-directional data bus.

C3

DQU1

I/O

Data Input/output: Bi-directional data bus.

C4

NO_USE

-

Not used

C5

NO_USE

-

Not used

C6

NO_USE

-

Not used

C7

DQSU

I/O

Data Strobe: Output with read data, input with write data. Edge-aligned with read data,
centered in write data. For the x16, DQSL: corresponds to the data on DQL0-DQL7; DQSU 
corresponds to the data on DQU0-DQU7. The data strobe DQS, DQSL and DQSU are paired 
with differential signals DQS, DQSL and DQSU, respectively, to provide differential pair 
signaling to the system during reads and writes. DDR3 SDRAM supports differential data 
strobe only and does not support single-ended.

C8

DQU2

I/O

Data Input/output: Bi-directional data bus.

C9

VDDQ

-

DQ Power Supply: 1.5V +/-0.075V

D1

VSSQ

-

DQ Ground

D2

VDDQ

-

DQ Power Supply: 1.5V +/-0.075V

D3

DMU

I

Input Data Mask: DM is an input mask signal for write data. Input data is masked when DM 
is sampled HIGH coincident with that input data during a Write access. DM is sampled on 
both edges of DQS. For x8 device, the function of DM or TDQS/ TDQS is enabled by Mode 
Register A11 setting in MR1.

D4

NO_USE

-

Not used

D5

NO_USE

-

Not used

D6

NO_USE

-

Not used

D7

DQU0

I/O

Data Input/output: Bi-directional data bus.

D8

VSSQ

-

DQ Ground

D9

VDD

-

Power Supply: 1.5V +/-0.075

E1

VSS

-

Ground

E2

VSSQ

-

DQ Ground

E3

DQL0

I/O

Data Input/output: Bi-directional data bus.

E4

NO_USE

-

Not used

E5

NO_USE

-

Not used

E6

NO_USE

-

Not used

E7

DML

I

Input Data Mask: DM is an input mask signal for write data. Input data is masked when DM 
is sampled HIGH coincident with that input data during a Write access. DM is sampled on 
both edges of DQS. For x8 device, the function of DM or TDQS/ TDQS is enabled by Mode 
Register A11 setting in MR1.

E8

VSSQ

-

DQ Ground