A-Data

ADS8608A8A

Pin Description

PIN

NAME

FUNCTION

CLK

System Clock

Active on the positive edge to sample all inputs.

CKE

Clock Enable

Masks system clock to freeze operation from the next clock cycle. CKE

should be enabled at least on cycle prior new command. Disable input

buffers for power down in standby

/CS

Chip Select

Disables or Enables device operation by masking or enabling all input

except CLK, CKE and L(U)DQM

A0~A12

Address

Row / Column address are multiplexed on the same pins.

Row address : A0~A12

Column address : A0~A9

BS0~BS1 Banks Select

Selects bank to be activated during row address latch time.

Selects bank for read / write during column address latch time.

DQ0~DQ7 Data

Data inputs / outputs are multiplexed on the same pins.

/RAS

Row Address Strobe

Latches row addresses on the positive edge of the CLK with /RAS low

/CAS

Column Address Strobe

Latches Column addresses on the positive edge of the CLK with /CAS low

/WE

Write Enable

Enables write operation and row recharge.

VCC/VSS Power Supply/Ground

Power and Ground for the input buffers and the core logic.

Power supply for output buffers.

NC

No Connection

This pin is recommended to be left No Connection on the device.

Block Diagram

CLK

CKE

Clock

Generator

Address

/CS

/RAS

/CAS

/WE

DQM

Mode

Register

Address

Buffer

&

Refresh

Counter

Column

Address

Buffer

&

Refresh

Counter

Bank0

Bank2

Bank3

Bank1

Amplifier

Column Decoder

Data Control Circuit

DQ

Rev 1.0 December, 2001

2