M65KA128AL datasheet(6/53 Pages) STMICROELECTRONICS

6 / 53 page

Summary description

M65KA128AL

6/53

Summary description

The M65KA128AL is a 128 Mbit Low Power Synchronous DRAM (SDRAM) organized as 4

Banks of 2,097,152 Words of 16 bits each.

The Low Power SDRAM achieves low power consumption and high-speed data transfer

using the pipeline architecture. It is well suited for handheld battery powered applications

like PDAs, 2.5 and 3G mobile phones and handheld computers.

The device architecture is illustrated in Figure 2: Functional Block Diagram. The device uses

Burst mode to read and write data. It is capable of one, two, four, eight-word and full page,

sequential and interleaved Burst.

To minimize current consumption during self-refresh operations, the M65KA128AL includes

three system-accessible mechanisms configured via the Extended Mode Register:

●

Automatic Temperature Compensated Self Refresh (TCSR) is used to adapts the

refresh rate according to the operating temperature.

●

Partial Array Self Refresh (PASR) performs a limited refresh of a half bank, a quarter of

bank, one bank, two banks or all banks.

●

The Deep Power-Down (DPD) mode completely halts the refresh operation and

achieves minimum current consumption by cutting off the supply voltage from the

whole memory array.

The M65KA128AL is programmable through two registers, the Mode Register and the

Extended Mode Register:

●

The Mode Register is used to select the CAS Latency, the Burst Type (sequential or

interleaved) and the Burst Length. For more details, refer to Table 4: Mode Register

Definition, and to Section 4.1: Mode Register Set command.

●

The Extended Mode Register is used to program the Low Power features (PASR and

Driver Strength) to reduce the current consumption during the Self Refresh operations.

For more details, refer to Table 5: Extended Mode Register Definition, and to

Section 4.2: Extended Mode Register Set command.

The M65KA128AL is offered in unsawn wafer.

M65KA128AL датащи(PDF) 6 Page - STMicroelectronics