M65KG512AB8W9 datasheet(22/54 Pages) STMICROELECTRONICS

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Operating modes

M65KG526AB

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4.5

Auto Refresh

This command performs the auto refresh of the memory array. The bank and the row

addresses to be refreshed are internally determined by the internal refresh controller.

Issuing an Auto Refresh command, caused the device to execute an auto refresh (see

Section 3: Commands).

4.6

Power-Down

In Power-Down mode, the current is reduced to the active standby current (IDD3P).

The Power-Down mode is initiated by issuing a Power-Down Entry command. tPDEN (1 clock

cycle) after the cycle when this command was issued, the DDR LPSDRAM enters into

Power-Down mode. In Power-Down mode, power consumption is reduced by deactivating

the input initial circuit. There is no internal refresh when the device is in the Power-Down

mode.

The device can exit from Power-Down tPDEX (1 cycle minimum) after issuing a Power-Down

Exit command.

See Section 3: Commands for details on the Power-Down Entry and Exit commands.

4.7

Deep Power-Down

In Deep Power-Down mode, the power consumption is reduced to the standby current

(IDD7).

Before putting the device in the Deep Power-Down mode all the banks must be Idle or have

been precharged.

The Deep Power-Down mode is entered and exited by issuing a Deep Power-Down Entry

and a Deep Power-Down Exit command.

See Section 3: Commands for details on the Power-Down Entry and Exit commands.

Table 6.

Operating modes (1)

Operating mode

KEn-1

KEn

RAS

CAS

A10

A10,

A11

A0-A9

BA0-BA1

Burst Read

VIH

VIL

VIH

VIL

VIH VIL

(2)

Start Column

Address

Bank

Select

Burst Write

VIH

VIL

VIH

VIL

VIL VIL

(2)

Start Column

Address

Bank

Select

Self Refresh

VIH

VIL

VIH

Auto Refresh

VIH

VIL

VIH

Power-Down

VIH

VIL

VIH

Deep Power-Down

VIH

VIL

VIH

VIL

X = Don’t Care VIL or VIH.

If A10 = VIL the Burst Read or Write operation is not followed by an Auto Precharge cycle. If A10 = VIH, the Burst Read or

Write operation is followed by an Auto Precharge cycle to the bank selected by BA0-BA1.

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