10

COMMERCIAL AND INDUSTRIAL

TEMPERATURE RANGES

IDT72V01/72V02/72V03/72V04/72V05/72V06 3.3V ASYNCHRONOUS FIFO

512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9, 8,192 x 9 and 16,384 x 9

Figure 15. Compound FIFO Expansion

R, W, RS

3033 drw 17

IDT

72V01/72V02/72V03/

72V04/72V05/72V06

DEPTH

EXPANSION

BLOCK

IDT

72V01/72V02/72V03/

72V04/72V05/72V06

DEPTH

EXPANSION

BLOCK

IDT

72V01/72V02/72V03/

72V04/72V05/72V06

DEPTH

EXPANSION

BLOCK

TABLE 2 — RESET AND FIRST LOAD TRUTH TABLE

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)

LocationZero

LocationZero

0

1

Reset All Other Devices

0

1

(1)

LocationZero

LocationZero

0

1

Read/Write

1

X

(1)

X

X

X

X

NOTE:

1. XI is connected to XO of previous device. See Figure 14. RS = Reset Input, FL/RT = First Load/Retransmit, EF = Empty Flag Output, FF = Full Flag Output,

XI = Expansion Input, HF = Half-Full Flag Output

Figure 14. Block Diagram of 1,536 x 9, 3,072 x 9, 6,144 x 9, 12,288 x 9, 24,576 x 9 and 49,152 x 9 FIFO Memory (Depth Expansion)

D

W

IDT

72V01

72V02

72V03

72V04

72V05

72V06

FF

EF

FL

XO

RS

FULL

EMPTY

R

9

9

9

9

XI

9

Q

FF

EF

FL

XO

XI

FF

EF

FL

XO

XI

IDT

72V01

72V02

72V03

72V04

72V05

72V06

IDT

72V01

72V02

72V03

72V04

72V05

72V06

NOTES:

1. For depth expansion block see section on Depth Expansion and Figure 14.

2. For Flag detection see section on Width Expansion and Figure 13.