IDT72521L35G datasheet(10/28 Pages) IDT

Part #	IDT72521L35G

Description	PARALLEL BIDIRECTIONAL FIFO 512 x 18 & 1024 x 18

Download	28 Pages

Scroll/Zoom	100%

Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

Logo

10 / 28 page

5.32

10

IDT72511/IDT72521

BIDIRECTIONAL FIRST-IN FIRST-OUT MEMORY

MILITARY AND COMMERCIAL TEMPERATURE RANGES

CONFIGURATION REGISTER FORMATS

2668 tbl 11

Table 9. Configuration Register 4 Internal Flag Assignments to

External Flag Pins

Assignment

Code

Internal Flag Assigned to Flag Pin

0000

A

→B

Empty

0001

A

→B

Almost-Empty

0010

A

→B

Full

0011

A

→B

Almost-Full

0100

B

→A

Empty

0101

B

→A

Almost-Empty

0110

B

→A

Full

0111

B

→A

Almost-Full

1000

A

→B Empty

1001

A

→B Almost-Empty

1010

A

→B Full

1011

A

→B Almost-Full

1100

B

→A Empty

1101

B

→A Almost-Empty

1110

B

→A Full

1111

B

→A Almost-Full

EXTERNAL FLAG ASSIGNMENT CODES

Programmable Flags

The IDT BiFIFO has eight internal flags. Associated with

each FIFO memory array are four internal flags, Empty,

Almost-Empty, Almost-Full and Full, for the total of eight

internal flags. The Almost-Empty and Almost-Full offsets can

be set to any depth through the Configuration Registers 0-3

(see Table 8). The flags are asserted at the depths shown in

Table 11. After a hardware reset or a software Reset All, the

almost flag offsets are set to 0. Even though the offsets are

equivalent, the Empty and Almost-Empty flags have different

timing which means that the flags are not coincident. Similarly,

the Full and Almost-Full flags are not coincident after reset

because of timing.

These eight internal flags can be assigned to any of four

external flag pins (FLGA-FLGD) through Configuration Regis-

ter 4 (see Table 9). For the specific flag timings, see Figures

20-23.

The current state of all eight flags is available in the Status

Register.

Config. Reg. 0

Config. Reg. 1

Config. Reg. 2

Config. Reg. 3

Config. Reg. 4

Config. Reg. 5

Config. Reg. 6

Config. Reg. 7

X

A

→B FIFO Almost Empty Flag Offset

A

→B FIFO Almost Full Flag Offset

B

→A FIFO Almost Empty Flag Offset

B

→A FIFO Almost Full Flag Offset

Flag D Pin Assignment

Flag C Pin Assignment

Flag B Pin Assignment

Flag A Pin Assignment

General Control

I/O Data

I/O Direction Control

15

10

9

12

11

8

7

4

3

0

2668 drw 02

2668 tbl 10

NOTE:

1.

Bit 9 of Configuration Registers 0-3 must be set to 0 on the IDT72511.

Table 8. The BiFIFO Configuration Register Formats

Similar Part No. - IDT72521L35G

Manufacturer	Part #	Datasheet	Description
Integrated Device Techn...	IDT72520	440Kb / 32P	BUS-MATCHING BIDIRECTIONAL FIFO 512 x 18-BIT . 1024 x 9-BIT 1024 x 18-BIT . 2048 x 9-BIT
	IDT72520L25J	440Kb / 32P	BUS-MATCHING BIDIRECTIONAL FIFO 512 x 18-BIT . 1024 x 9-BIT 1024 x 18-BIT . 2048 x 9-BIT
	IDT72520L35J	440Kb / 32P	BUS-MATCHING BIDIRECTIONAL FIFO 512 x 18-BIT . 1024 x 9-BIT 1024 x 18-BIT . 2048 x 9-BIT
	IDT72520L50J	440Kb / 32P	BUS-MATCHING BIDIRECTIONAL FIFO 512 x 18-BIT . 1024 x 9-BIT 1024 x 18-BIT . 2048 x 9-BIT

More results

Similar Description - IDT72521L35G

Manufacturer	Part #	Datasheet	Description
Sharp Corporation	LH540215	423Kb / 48P	512 x 18 / 1024 x 18 Synchronous FIFO
Integrated Device Techn...	IDT72510	440Kb / 32P	BUS-MATCHING BIDIRECTIONAL FIFO 512 x 18-BIT . 1024 x 9-BIT 1024 x 18-BIT . 2048 x 9-BIT
Integrated Device Techn...	IDT72205LB	181Kb / 16P	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
Sharp Corporation	LH543611	475Kb / 57P	512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO
Texas Instruments	SN74V215	590Kb / 43P	[Old version datasheet] 512 X 18, 1024 X 18, 2048 X 18, 4096 X 18 DSP-SYNC FIRST-IN, FIRST-OUT MEMORIES
	SN74V215	600Kb / 43P	[Old version datasheet] 512 X 18, 1024 X 18, 2048 X 18, 4096 X 18 DSP-SYNC FIRST-IN, FIRST-OUT MEMORIES
	SN74V215	555Kb / 40P	[Old version datasheet] 512 X 18, 1024 X 18, 2048 X 18, 4096 X 18 DSP-SYNC FIRST-IN, FIRST-OUT MEMORIES
Integrated Device Techn...	IDT72105	179Kb / 12P	CMOS PARALLEL-TO-SERIAL FIFO 256 x 16, 512 x 16, 1024 x 16
Integrated Device Techn...	IDT72V205	214Kb / 25P	3.3 VOLT CMOS SyncFIFO 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18, and 4,096 x 18
Renesas Technology Corp	IDT72255LA	404Kb / 28P	CMOS SuperSync FIFO™ 8,192 x 18 16,384 x 18 NOVEMBER 2017

More results

IDT72521L35G Datasheet(PDF) 10 Page - Integrated Device Technology

IDT72521L35G Datasheet(HTML) 10 Page - Integrated Device Technology

Similar Part No. - IDT72521L35G

Similar Description - IDT72521L35G

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Download

Link URL