Datasheet > 72841L10PF

72841L10PF

更新时间： 2022-12-01 20:35:03

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
16页	339K
描述
TQFP-64, Tray

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数据手册

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72841L10PF 数据手册

IDT72801/728211/72821/72831/72841/72851 DUAL CMOS SyncFIFO^TM

DUAL 256 x 9, DUAL 512 x 9, DUAL 1K x 9, DUAL 2K x 9, DUAL 4K x 9, DUAL 8K x 9

COMMERCIAL AND INDUSTRIAL

TEMPERATURERANGES

Programmable Almost–Full Flag (PAFA, PAFB) — PAFA (PAFB) will

ProgrammableAlmost–EmptyFlag(PAEA,PAEB)—PAEA(PAEB)will

goLOWwhentheamountofdatainArrayA(B)reachesthealmost-fullcondition. goLOWwhenthereadpointeris"n+1"locationslessthanthewritepointer. The

IfnoreadsareperformedafterReset,PAFA(PAFB)willgoLOWafter(256-m) offset"n"isdefinedintheEmptyOffset registers. Ifnoreadsareperformedafter

writes to the IDT72801's FIFO A (B); (512-m) writes to the IDT72811's FIFO Reset,PAEA(PAEB)willgoHIGHafter"n+1"writestoFIFOA(B).

A(B);(1,024-m)writestotheIDT72821'sFIFOA(B);(2,048-m)writestothe

IDT72831's FIFO A (B); (4,096-m) writes to the IDT72841's FIFO A (B); or words.

(8,192-m) writes to the IDT72851's FIFO A (B).

FFA(FFB)issynchronizedwithrespecttotheLOW-to-HIGHtransitionofthe of the Read Clock RCLKA (RCLKB).

Write Clock WCLKA (WCLKB). The offset “m” is defined in the Full Offset

IfthereisnoEmptyoffsetspecified,PAEA(PAEB)willgoLOWatEmpty+7

PAEA(PAEB)issynchronizedwithrespecttotheLOW-to-HIGHtransition

Data Outputs (QA0 –QA8, QB0 – QB8 ) — QA0 - QA8 are the nine data

registers.

outputsformemoryarrayA,QB0 -QB8aretheninedataoutputsformemory

array B.

IfthereisnoFulloffsetspecified,PAFA(PAFB)willgoLOWatFull-7words.

PAFA(PAFB)issynchronizedwithrespecttotheLOW-to-HIGHtransition

ofWCLKA(WCLKB).

TABLE 1: STATUS FLAGS FOR A AND B FIFOS

NUMBER OF WORDS IN ARRAY A

FFA

FFB

PAFA

PAFB

PAEA

PAEB

EFA

EFB

NUMBER OF WORDS IN ARRAY B

72801

72811

72821

1 to n⁽¹⁾

(n+1) to (256-(m+1))

(256-m)⁽²⁾to 255

256

(n+1) to (512-(m+1))

(512-m)⁽²⁾to 511

512

(n+1) to (1,024-(m+1))

(1,024-m)⁽²⁾to 1,023

1,024

NUMBER OF WORDS IN ARRAY A

FFA

FFB

PAFA

PAFB

PAEA

PAEB

EFA

EFB

NUMBER OF WORDS IN ARRAY B

72831

72841

72851

1 to n⁽¹⁾

(n+1) to (2,048-(m+1))

(2,048-m)⁽²⁾to 2,047

2,048

(n+1) to (4,096-(m+1))

(4,096-m)⁽²⁾to 4,095

4,096

(n+1) to (8,192-(m+1))

(8,192-m)⁽²⁾to 8,191

8,192

NOTES:

1. n = Empty Offset (n = 7 default value)

2. m = Full Offset (m = 7 default value)

MARCH2013

1...5 6 789 10 11...16

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