Datasheet > PC87108AVHG

PC87108AVHG

更新时间： 2024-11-08 03:43:07

品牌	Logo	应用领域
美国国家半导体 - NSC		外围集成电路数据传输控制器通信时钟
页数	文件大小	规格书
56页	427K
描述
Advanced UART and Infrared Controller

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数据手册

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PC87108AVHG 数据手册

PRELIMINARY

August 1998

PC87108AVHG/PC87108AVJE

Advanced UART and Infrared Controller

General Description

Features

n Fully compatible with 16550 and 16450 devices

n Extended UART mode

The PC87108A is a serial communications device with infra-

red capability. It supports 6 modes of operation and is back-

ward compatible with the 16550 and 16450. The operational

modes are: UART, Sharp-IR, IrDA 1.0 SIR, IrDA 1.1 MIR and

FIR, and Consumer Electronics IR (also referred to as TV

Remote or Consumer Remote Control).

n Sharp-IR with selectable internal or external modulation/

demodulation

n IrDA 1.0 SIR with up to 115.2 kbaud data rate

n IrDA 1.1 MIR and FIR with 0.576, 1.152 and 4.0 Mbps

data rates

The device provides two methods to allow its internal regis-

ters to be accessed. It can either directly decode a 16-bit ad-

dress, or it can accept an externally generated chip select in

combination with a 4-bit address. When a 16-bit address is

used, any one of four PC COMM port legacy addresses can

be selected as the base address.

n CEIR mode

n UART mode data rates up to 1.5 Mbps

n Back-to-Back infrared frame transmission and reception

n Full duplex infrared frame transmission and reception

n Transmit deferral

n Automatic fallback to 16550 compatibility mode

n IrDA modes pipelining

In order to support existing legacy software based upon the

16550 UART, the PC87108A provides a special fallback

mechanism that automatically switches the device to 16550

compatibility mode when the baud generator divisor is ac-

cessed through the legacy ports in bank 1.

n Selectable 16 or 32 level FIFOs

n Support for Plug-n-Play infrared adapters

n Automatic or manual transceiver configuration

n 12-bit timer for infrared protocol support

n 4 general purpose I/O pins

n Interrupt signal routing to 1 of 7 output pins

n DMA handshake signal routing for either 1 or 2 channels

n Full 16-bit address decode

The device architecture has been optimized to meet the re-

quirements of a variety of UART and infrared based applica-

tions. DMA support for all operational modes has been incor-

porated into the architecture. Routing for interrupt and DMA

handshake signals is provided to meet Plug-and-Play as well

as PC’ 95 requirements.

The device can use either 1 or 2 DMA channels. One chan-

nel is required for infrared based applications, since infrared

communications work in half duplex fashion. Two channels

would normally be needed to handle high-speed full duplex

UART based applications.

n Selectable base address or chip select mode

n Support for power management

n 5V or 3.3V operation

n ISA compatible interface

n 80-pin PQFP or TQFP package

To further ease driver design and simplify the implementa-

tion of infrared protocols, a 12-bit timer with 125 µs resolu-

tion has also been included.

Block Diagram

DS012549-1

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

DS012549

www.national.com

12 3 4 5 6 7...56

中文翻译

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与PC87108AVHG相关器件

型号	品牌	获取价格	描述	数据表
PC87108AVHG/PC87108AVJE	ETC	获取价格	Advanced UART and Infrared Controller Preliminary
PC87108AVJE	NSC	获取价格	Advanced UART and Infrared Controller
PC87108AVJE	TI	获取价格	暂无描述
PC87108VHG	NSC	获取价格	Advanced UART and Infrared Controller
PC87108VJE	NSC	获取价格	Advanced UART and Infrared Controller
PC87109	ETC	获取价格
PC87109EB	TI	获取价格	1 CHANNEL(S), 4Mbps, SERIAL COMM CONTROLLER, PQFP32, TQFP-32
PC87109VBE	NSC	获取价格	PC87109VBE Advanced UART and Infrared Controller
PC87120	NSC	获取价格	PC87120 SuperAT⑩
PC87200	NSC	获取价格	PC87200 PCI to ISA Bridge

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