IDT7207(1996) 查看數據表（PDF） - Integrated Device Technology

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IDT7207
(Rev.:1996)

CMOS ASYNCHRONOUS FIFO 32,768 x 9

Integrated Device Technology 

IDT7207 CMOS ASYNCHRONOUS FIFO

32,768 x 9

MILITARY AND COMMERCIAL TEMPERATURE RANGES

TRUTH TABLES

TABLE I – RESET AND RETRANSMIT

SINGLE DEVICE CONFIGURATION/WIDTH EXPANSION MODE

Inputs

Internal Status

Outputs

Mode

RS

RT

XI Read Pointer Write Pointer

EF

FF

Reset

0

X

0 Location Zero Location Zero

0

1

Retransmit

1

0

0 Location Zero Unchanged

X

X

Read/Write

1

1

0 Increment (1)

Increment (1)

X

X

NOTE:

1. Pointer will Increment if flag is HIGH.

HF

1

X

X

3140 tbl 09

TABLE II – RESET AND FIRST LOAD

DEPTH EXPANSION/COMPOUND EXPANSION MODE

Inputs

Internal Status

Outputs

Mode

RS

FL

XI

Read Pointer

Write Pointer

EF

FF

Reset First Device

0

0

(1)

Location Zero

Location Zero

0

1

Reset all Other Devices 0

1

(1)

Location Zero

Location Zero

0

1

Read/Write

1

X

(1)

X

X

X

X

NOTES:

3140 tbl 10

1. XI is connected to XO of previous device. See Figure 14.

2. RS = Reset Input, FL/RT = First Load/Retransmit, EF = Empty Flag Output, FF = Full Flag Output, XI = Expansion Input, HF = Half-Full Flag Output

W

D

FULL

RS

XO

FF

IDT

EF

7207

9

9

9

FL

XI

FF

9

XO

IDT

EF

7207

FL

FF

9

XI

XO

IDT

EF

7207

FL

XI

Figure 14. Block Diagram of 98,304 x 9 FIFO Memory (Depth Expansion)

5.05

R

Q

VCC

EMPTY

3140 drw 17

10

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