LH543611中文資料夏普微數(shù)據(jù)手冊PDF規(guī)格書

FUNCTIONAL DESCRIPTION

The LH543611 and LH543621 contain two FIFO buffers, FIFO #1 and FIFO #2. These operate in parallel, but in opposite directions, for bidirectional data buffering. FIFO #1 and FIFO #2 each are organized as 512 or 1024 by 36 bits. The LH543611 and LH543621 are ideal either for wide unidirectional applications or for bidirectional data applications; component count and board area are reduced.

FEATURES

? Pin-Compatible and Functionally Upwards-Compatible with Sharp LH5420 and LH543601, but Deeper

? Expanded Control Register that is Fully Readable as well as Writeable

? Fast Cycle Times: 18/20/25/30/35 ns

? Improved Input Setup and Flag Out Timing

? Two 512 × 36-bit FIFO Buffers (LH543611) or Two 1024 × 36-bit FIFO Buffers (LH543621)

? Full 36-bit Word Width

? Selectable 36/18/9-bit Word Width on Port B; Selection May be Changed Without Resetting the BiFIFO

? Programmable Byte-Order Reversal – ‘Big-Endian ? Little-Endian Conversion’

? Independently-Synchronized (‘Fully-Asynchronous’) Operation of Port A and Port B

? ‘Synchronous’ Enable-Plus-Clock Control at Both Ports

? R/W, Enable, Request, and Address Control Inputs are Sampled on the Rising Clock Edge

? Synchronous Request/Acknowledge ‘Handshake’ Capability; Use is Optional

? Device Comes Up Into a Known Default State at Reset; Programming is Allowed, but is not Required

? Asynchronous Output Enables

? Five Status Flags per Port: Full, Almost-Full, Half-Full, Almost-Empty, and Empty

? All Flags are Independently Programmable for Either Synchronous or Asynchronous Operation

? Almost-Full Flag and Almost-Empty Flag Have Programmable Offsets

? Mailbox Registers with Synchronized Flags

? Data-Bypass Function

? Data-Retransmit Function

? Automatic Byte Parity Checking with Programmable Parity Flag Latch

? Programmable Byte Parity Generation

? Programmable Byte, Half-Word, or Full-Word Oriented Parity Operations

? 8 mA-IOL High-Drive Three-State Outputs with Built-In Series Resistor

? TTL/CMOS-Compatible I/O

? Space-Saving PQFP and TQFP Packages