Datasheet > IS82C237-12

IS82C237-12

更新时间： 2024-11-16 22:10:59

品牌	Logo	应用领域
英特矽尔 - INTERSIL		外围集成电路控制器时钟
页数	文件大小	规格书
25页	161K
描述
CMOS High Performance Programmable DMA Controller

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数据手册

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IS82C237-12 数据手册

82C237

CMOS High Performance

Programmable DMA Controller

March 1997

Features

Description

• Fully Compatible with Intersil 82C37A

The 82C237 is a modiﬁed version of the 82C37A. The

82C237 is fully software and pin for pin compatible with the

82C37A but provides an additional mode for 16-bit DMA

transfers, as well as enhanced speed. Each channel may be

individually programmed for 8-bit or 16-bit data transfers.

- 82C237 May be Used in 8MHz and 12.5MHz 82C37A

Sockets

• Optimized for 10MHz and 12.5MHz 80C286 Systems

• Special Mode Permits 16-Bit, Zero Wait State DMA

Transfers

The 82C237 controller can improve system performance by

allowing external devices to transfer data directly to or from

system memory. Memory-to-memory transfer capability is

also provided, along with a memory block initialization fea-

ture. DMA requests may be generated by either hardware or

software, and each channel is independently programmable

with a variety of features for ﬂexible operation.

• High Speed Data Transfers:

- Up to 6.25MBytes/sec with 12.5MHz Clock in

Normal Mode

- Up to 12.5MBytes/sec with 12.5MHz Clock in 16-Bit

Mode

The 82C237 is designed to be used with an external address

latch, such as the 82C82, to demultiplex the most signiﬁcant

8 bits of address. An additional latch is required to

temporarily store the most signiﬁcant 8 bits of data if 16-bit

memory-to-memory transfers are desired. The 82C237 can

be used with industry standard microprocessors such as

80C286, 80286, 80C86, 80C88, 8086, 8088, 8085, Z80,

NSC800, 80186 and others. Multimode programmability

allows the user to select from three basic types of DMA

services, and reconﬁguration under program control is

possible even with the clock to the controller stopped. Each

channel has a full 64K address and word count range, and

may be programmed to autoinitialize these registers

following DMA termination (end of process).

• Compatible with the NMOS 8237A

• Four Independent Maskable Channels with Autoinitial-

ization Capability

• Cascadable to any Number of Channels

• Memory-to-Memory Transfers

• Static CMOS Design Permits Low Power Operation

- ICCSB = 10µA Maximum

- ICCOP = 2mA/MHz Maximum

• Fully TTL/CMOS Compatible

• Internal Registers may be Read from Software

Ordering Information

TEMPERATURE

PACKAGE

PDIP

RANGE

8MHz

CP82C237

12.5MHz

CP82C237-12

IP82C237-12

PKG. NO.

0 C to +70 C

E40.6

-40 C to +85 C

IP82C237

PLCC

0 C to +70 C

CS82C237

CS82C237-12

IS82C237-12

N44.65

F40.6

J44.A

-40 C to +85 C

IS82C237

SBDIP

0 C to +70 C

CD82C237

CD82C237-12

ID82C237-12

-40 C to +85 C

ID82C237

-55 C to +125 C

MD82C237/B

5962-9054304MQA

MR82C237/B

5962-9054304MXA

MD82C237-12/B

5962-9054305MQA

MR82C237-12/B

5962-9054305MXA

SMD#

CLCC

SMD#

-55 C to +125 C

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

File Number 2965.1

12 3 4 5 6 7...25

中文翻译

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与IS82C237-12相关器件

型号	品牌	获取价格	描述	数据表
IS82C37A	INTERSIL	获取价格	CMOS High Performance Programmable DMA Controller
IS82C37A	HARRIS	获取价格	CMOS High Performance Programmable DMA Controller
IS82C37A-12	INTERSIL	获取价格	CMOS High Performance Programmable DMA Controller
IS82C37A-12	HARRIS	获取价格	CMOS High Performance Programmable DMA Controller
IS82C37A-5	HARRIS	获取价格	CMOS High Performance Programmable DMA Controller
IS82C37A-5	INTERSIL	获取价格	CMOS High Performance Programmable DMA Controller
IS82C50A	ETC	获取价格	UART
IS82C50A-5	INTERSIL	获取价格	CMOS Asynchronous Communications Element
IS82C50A-5Z	INTERSIL	获取价格	CMOS Asynchronous
IS82C52	INTERSIL	获取价格	CMOS Serial Controller Interface

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