INS8257 Datasheet Programmable DMA Controller

Manufacturer: National Semiconductor (now Texas Instruments)

INS8257 programmable dma controller by National Semiconductor (now Texas Instruments) - Datasheet Preview

Datasheet Details

Part number	INS8257
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	943.71 KB
Description	Programmable DMA Controller
Download	INS8257 Download (PDF)

General Description

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The INS8257 is a Direct Memory Access (DMA) con· troller contained in a standard 40·pin dual·in·line The channel control registers consist of four 16·bit DMA address registers and four 16·bit terminal count 3 3 package.

The chip, which is fabricated using (TC) registers.

Overview

~National ~ Semiconductor Preliminary JULY 1978.

-Z ~ INS8257 Programmable DMA Controller "tJ c8.

Key Features

Four.
Channel DMA Controller.
Priority DMA Request Logic . . -a. g::. :s. CD registers (one pair per channel). A status register is also Included, which provides terminal count status.
Channel Inhibit Logic for each channel. The status register also contains a.
Terminal Count and Modulo 128 Outputs register programming flag, which is a valuable aid in maintaining byte synchronization when pJogram.
Auto Load Mode ming channel control regis.

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number	Description
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INS8250-B	Asynchronous Receiver/Transmitter
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INS8251	Programmable Communication Interface
INS8253	Programmable Interval Timer
INS8254	N-Channel Bit Programmable Peripherallnterface
INS8255	Programmable Peripheral Interface
INS8255N	Programmable Peripheral Interface
INS8259	Programmable Interrupt Controller
INS8202	Octal Buffers