M67025E datasheet(8/27 Pages) ATMEL

Part #	M67025E

Description	Rad. Tolerant High Speed 8 Kb x 16 Dual Port RAM

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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8 / 27 page

8

4146N–AERO–04/07

M67025E

Truth Table

Note:

1. AOL - A12 ≠ AOR n- A12R

Note:

1. Inputs Signals are for Semaphore Flags set and test (Write and Read) operations.

Table 1. Non Contention Read/Write Control

Note: Inputs(1)

Outputs

Mode

CS

R/W

OE

UB

LB

SEM

IO8 - IO15

I/O0- I/O7

H

X

H

Hi-Z

Deselected: Power Down

X

H

Hi-Z

Deselected: Power Down

L

X

L

H

DATAIN

Hi-Z

Write to Upper Byte Only

L

X

H

L

H

Hi-Z

DATAIN

Write to Lower Byte Only

L

X

L

H

DATAIN

Write to Both Bytes

L

H

L

H

DATAOUT

Hi-Z

Read Upper Byte Only

L

H

L

H

L

H

Hi-Z

DATAOUT

Read Lower Byte Only

L

H

L

H

DATAOUT

Read Both Bytes

X

H

X

Hi-Z

Outputs Disabled

H

L

X

L

DATAOUT

Read Data in Sema. Flag

X

H

L

H

L

DATAOUT

Read Data in Sema. Flag

H

X

L

DATAIN

Write DIN0 into Sema. Flag

X

H

L

DATAIN

Write DIN0 into Sema. Flag

L

X

L

X

L

–

Not Allowed

L

X

L

–

Not Allowed

Table 2. Arbitration Options

Options

Inputs

Outputs

CS

UB

LB

M/S

SEM

BUSY

INT

Busy Logic Master

L

X

L

H

Output

–

L

X

H

Signal

Busy Logic Slave

L

X

L

H

Input

–

L

X

L

H

Signal

–

Interrupt Logic

L

X

L

X

H

–

Output

L

X

H

Signal

Semaphore Logic(1)

H

X

H

L

H

–

H

X

L

Hi-Z

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