M67204H datasheet(3/20 Pages) ATMEL

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M67204H

4141J–AERO–04/07

Pin Description

Data In (I0 - I8)

Data inputs for 9-bit data

Reset (RS)

Reset occurs whenever the Reset (RS) input is taken to a low state. Reset returns both

internal read and write pointers to the first location. A reset is required after power-up

before a write operation can be enabled. Both the Read Enable (R) and Write Enable

(W) inputs must be in the high state during the period shown in Figure 1 (i.e. tRSS before

the rising edge of RS) and should not change until tRSR after the rising edge of RS. The

Half-Full Flag (HF) will be reset to high After Reset (RS).

Figure 1. Reset

Notes:

1. EF, FF and HF may change status during reset, but flags will be valid at tRSC.

2. W and R = VIH around the rising edge of RS.

Names

Description

Full Flag

XO/HF

Expansion Out/Half-Full Flag

Expansion IN

FL/RT

First Load/Retransmit

VCC

Power Supply

GND

Ground

I0-8

Inputs

Q0-8

Outputs

Write Enable

Read Enable

Reset

Empty Flag

M67204H Datasheet(PDF) 3 Page - ATMEL Corporation