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PC87108VJE PDF预览

PC87108VJE

更新时间： 2024-11-09 21:54:59
品牌 Logo 应用领域
美国国家半导体 - NSC 控制器
页数 文件大小 规格书
2页 73K
描述
Advanced UART and Infrared Controller

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中文翻译

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PC87108VJE 技术参数

生命周期：Obsolete包装说明：,
Reach Compliance Code：unknown风险等级：5.83
Base Number Matches：1

PC87108VJE 数据手册

 浏览型号PC87108VJE的Datasheet PDF文件第2页 
ADVANCE INFORMATION  
November 1995  
PC87108  
Advanced UART and Infrared Controller  
General Description  
Features  
Y
Fully compatible with 16550 and 16450 devices  
The PC87108 is a serial communications device with infra-  
red capability. It supports 6 modes or 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 Remote Control (commonly referred to  
as TV Remote).  
Y
Enhanced UART mode  
Y
Sharp-IR with selectable internal or external  
modulation  
Y
IrDA 1.0 SIR with up to 115.2 kbps data rate  
Y
IrDA 1.1 MIR and FIR with 1.152 and 4.0 Mbps data  
rates  
Two methods are provided to access the internal registers:  
an internal 16-bit address decoder, or an externally generat-  
ed chip select in combination with an internal 4-bit address  
decoder are used to generate the internal register select.  
When the internal 16-bit address decoder is used, any one  
of four PC COMM port legacy addresses can be selected as  
the base address.  
Y
Consumer remote control mode  
Y
UART mode baud rates up to 1.5 Mbps  
Y
Back-to-back infrared frame transmission and reception  
Y
Full duplex infrared capability for diagnostics  
Y
Transmit deferral  
Y
Automatic fallback to 16550 compatibility mode  
In order to support existing legacy software using the 16550  
UART, the PC87108 provides a special fallback mechanism  
that automatically switches the device to 16550 compatibil-  
ity mode when the standard baud generator divisor registers  
are accessed.  
Y
IrDA modes pipelining  
Y
Selectable 16 or 32 level FIFOs  
Y
Multiple optical transceiver support  
Y
Automatic or manual transceiver configuration  
Y
12-bit timer for infrared protocol support  
The device architecture has been optimized to meet the  
requirements of a variety of UART and infrared based appli-  
cations. DMA support for all operational modes has been  
incorporated into the architecture. Routing for interrupt and  
DMA handshake signals is provided to meet Plug-and-Play  
as well as PC’95 requirements.  
Y
4 general purpose I/O pins  
Y
Interrupt signal routing to 1 of 7 output pins  
Y
DMA handshake signal routing for either 1 or 2  
channels  
Y
Full 16-bit address decode  
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.  
Y
Selectable base address or chip select mode  
Y
Power management support  
Y
3.3V and 5V operation  
Y
ISA compatible interface  
Y
80-pin PQFP or TQFP package  
To further ease driver design and simplify the implementa-  
tion of infrared protocols, a 12-bit timer with 1 ms resolution  
has also been included.  
Block Diagram  
TL/XX/0249–1  
C
1996 National Semiconductor Corporation  
TL/XX/0249  
RRD-B30M66/Printed in U. S. A.  
12

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