NT5SV16M8CT View Datasheet(PDF) - Nanya Technology

Part Name

Description

Manufacturer

NT5SV16M8CT

128Mb Synchronous DRAM

Nanya Technology 

NT5SV32M4CT

NT5SV16M8CT

NT5SV8M16CT

128Mb Synchronous DRAM

Clock Suspend Mode

During normal access mode, CKE is held high, enabling the clock. When CKE is registered low while at least one of the banks

is active, Clock Suspend Mode is entered. The Clock Suspend mode deactivates the internal clock and suspends or “freezes”

any clocked operation that was currently being executed. There is a one-clock delay between the registration of CKE low and

the time at which the SDRAM’s operation suspends. While in Clock Suspend mode, the SDRAM ignores any new commands

that are issued. The Clock Suspend mode is exited by bringing CKE high. There is a one clock cycle delay from when CKE

returns high to when Clock Suspend mode is exited.

When the operation of the SDRAM is suspended during the execution of a Burst Read operation, the last valid data output onto

the DQ pins will be actively held valid until Clock Suspend mode is exited.

Clock Suspend during a Read Cycle

T0

CK

CKE

COMMAND NOP

T1

T2

READ A

NOP

T3

NOP

(Burst Length = 4, CAS Latency = 2)

T4

T5

T6

T7

T8

A one clock delay before

suspend operation starts

A one clock delay to exit

the Suspend command

NOP

NOP

DQs

: “H” or “L”

DOUT A 0

DOUT A 1

DOUT element at the DQs when the

suspend operation starts is held valid

DOUT A2

If Clock Suspend mode is initiated during a burst write operation, the input data is masked and is ignored until the Clock Sus-

pend mode is exited.

Clock Suspend during a Write Cycle

(Burst Length = 4, CAS Latency = 2)

T0

T1

T2

T3

T4

T5

T6

T7

T8

CK

CKE

COMMAND NOP

WRITE A

NOP

NOP

A one clock delay before

suspend operation starts

A one clock delay to exit

the Suspend command

NOP

NOP

DQs

: “H” or “L”

DIN A0

DIN A1

DIN A2

DIN A3

DIN is masked during the Clock Suspend Period

REV 1.0

May, 2001

28

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NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.

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