LH543601 datasheet(2/43 Pages) SHARP

Part #	LH543601

Description	256 x 36 x 2 Bidirectional FIFO

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Manufacturer	SHARP [Sharp Corporation]

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FUNCTIONAL DESCRIPTION (cont’d)

Two mailbox registers provide a separate path for

passing control words or status words between ports.

Each mailbox has a New-Mail-Alert Flag, which is syn-

chronized to the reading port’s clock. This mailbox func-

tion facilitates the synchronization of data transfers

between asynchronous systems.

Data-bypass mode allows Port A to directly transfer

data to or from Port B at reset. In this mode, the device

acts as a registered transceiver under the control of

Port A. For instance, a master processor on Port A can

use the data bypass feature to send or receive initializa-

tion or configuration information directly, to or from a

peripheral device on Port B, during system startup.

A word-width-select option is provided on Port B for

36-bit, 18-bit, or 9-bit data access. This feature allows

word-width matching between Port A and Port B, with no

additional logic needed. It also ensures maximum utiliza-

tion of bus bandwidths.

A Byte Parity Check Flag at each port monitors data

integrity. Control-Register bit 0 (zero) selects the parity

mode, odd or even. This bit is initialized for odd data parity

at reset; but it may be reprogrammed for even parity, or

back again to odd parity, as desired.

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VCCO

D10A

D9A

D8A

VSSO

D7A

D6A

D5A

D4A

D3A

D2A

D1A

D0A

RS

RT1

D1B

D2B

D3B

D4B

D5B

D6B

D7B

D8B

D9B

D10B

D11B

VCCO

VSSO

VCCO

VSSO

VCCO

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50

D0B

VCCO

D24A

D25A

D26A

VSSO

D27A

D28A

D29A

D30A

D31A

D32A

D33A

D34A

D35A

RT2

D35B

D34B

D33B

D32B

D31B

D30B

D29B

D28B

D27B

D26B

D25B

VCCO

VSSO

VSS

VSSO

VCCO

VSSO

VCCO

543601-30

TOP VIEW

CHAMFERED

EDGE

Figure 1. Pin Connections for 132-Pin PQFP Package

(Top View)

PIN CONNECTIONS

LH543601

256

× 36 × 2 Bidirectional FIFO

2

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Manufacturer	Part #	Datasheet	Description
Sharp Corporation	LH543611	475Kb / 57P	512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO
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	LH543621	475Kb / 57P	512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO

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Sharp Corporation	LH5420	2Mb / 35P	256 x 36 x 2 Bidirectional FIFO
Sharp Corporation	LH543611	475Kb / 57P	512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO
Integrated Device Techn...	IDT723622	294Kb / 26P	CMOS SyncBiFIFOO 256 x 36 x 2, 512 x 36 x 2, 1024 x 36 x 2
Renesas Technology Corp	IDT723622	370Kb / 25P	CMOS SyncBiFIFOTM 256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2 FEBRUARY 2015
Integrated Device Techn...	IDT72V3622	217Kb / 29P	3.3 VOLT CMOS SyncBiFIFO 256 x 36 x 2 512 x 36 x 2 1,024 x 36 x 2
Renesas Technology Corp	IDT72V3622	385Kb / 30P	3.3 VOLT CMOS SyncBiFIFOTM 256 x 36 x 2 512 x 36 x 2 1,024 x 36 x 2 FEBRUARY 2015
Integrated Device Techn...	IDT72V3624	362Kb / 34P	3.3 VOLT CMOS SyncBiFIFO WITH BUS-MATCHING 256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2
Renesas Technology Corp	IDT723626	404Kb / 36P	CMOS TRIPLE BUS SyncFIFOTM WITH BUS-MATCHING 256 x 36 x 2, 512 x 36 x 2 1,024 x 36 x 2 MARCH 2018
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	IDT72V3626	742Kb / 37P	3.3 VOLT CMOS TRIPLE BUS SyncFIFOTM WITH BUS-MATCHING 256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2 FEBRUARY 2009

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LH543601 Datasheet(PDF) 2 Page - Sharp Corporation

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