參數(shù)資料
型號(hào)： SC68C198
廠商： NXP Semiconductors N.V.
英文描述： Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 50 psi, Absolute, Cell with body o-ring, 10 Vdc excitation
中文描述： 八路與TTL兼容的UART在3.3V和5V電源電壓
文件頁(yè)數(shù)： 1/49頁(yè)
文件大小： 358K
代理商： SC68C198
Philips Semiconductors
Product specification
SC26C198 SC68C198
SC26L198 SC68L198
Octal UART with TTL compatibility at 3.3V
and 5V supply voltages
336
1995 May 1
853-1756 15179
Table of Contents
Description
Uses
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Configurations
. . . . . . . . . . . . . . . . . . . . . . . . .
Pinout
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings
Block Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description
Conceptual Overview
. . . . . . . . . . . . . . . . . . . . . . .
Host Interface
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Asynchronous bus cycle
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Synchronous bus cycle
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Circuits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crystal Oscillator
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sclk – System Clock
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baud Rate Generator BRG
BRG Counters (Used for random baud rate generation)
Channel Blocks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Character Recognition
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupt Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Global Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Ports
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detailed Descriptions
. . . . . . . . . . . . . . . . . . . . . . .
Receiver and Transmitter
Transmitter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Status Bits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission of ”break”
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
1x and 16x modes, Transmitter
Transmitter FIFO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1x and 16x mode, Receiver
Receiver Status Bits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver FIFO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RxFIFO Status: Status reporting modes
I/O ports
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose Pins
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Global Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Character Recognition
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Xon Xoff Characters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi-drop or Wake up or 9 bit mode
Character Stripping
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupt Arbitration and IRQN generation
IACKN Cycle, Update CIR
Polling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enabling and Activating Interrupt sources
Setting Interrupt Priorities
Modes of Operation
. . . . . . . . . . . . . . . . . . . . . . . .
Major Modes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minor Modes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Watch-dog Timer Time–out Mode
Wake Up Mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Xon/Xoff Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REGISTER DEfiniTIONS
MR – Mode Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UCIR – Update CIR
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose Output Pin Control
Register Maps
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Map Summary
336
337
337
338
338
339
339
340
340
340
340
340
340
341
341
341
341
341
341
341
342
342
342
342
342
342
342
343
343
343
343
343
343
344
344
344
345
345
345
345
345
345
345
346
346
346
346
347
347
348
348
348
349
351
351
360
361
363
363
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
Register Map Detail
Reset Conditions
Device Configuration after Hardware Reset or CRa cmd=x1F 372
Cleared registers:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clears Modes for:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disables:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halts:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limitations:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Specifications
. . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Specifications
(26L198 and 68L198)
. . . . . . . . . . . . . . . . . . . . . . .
AC Electrical Characteristics5 (26L198 and
68L198)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INDEX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
364
372
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
372
372
372
372
373
373
376
377
383
DESCRIPTION
The Philips 26C198 Octal UART is a single chip CMOS–LSI
communications device that provides 8 full-duplex asynchronous
channels with significantly deeper 16 byte FIFOs, Automatic
in–band flow control using Xon/Xoff characters defined by the user
and address recognition in the wake up mode. Synchronous bus
interface is used for all communication between host and OCTART.
It is fabricated using Philips 1.0 micron CMOS technology that
combines the benefits of low cost, high density and low power
consumption.
The operating speed of each receiver and transmitter can be
selected independently from one of 22 fixed baud rates, a 16X clock
derived from one of two programmable baud rate counters or one of
three external 16X clocks (1 available at 1x clock rate). The baud
rate generator and counter can operate directly from a crystal or
from seven other external or internal clock inputs. The ability to
independently program the operating speed of the receiver and
transmitter makes the Octal UART particularly attractive for dual
speed full duplex channel applications such as clustered terminal
systems. The receivers and transmitters are buffered with FIFOs of
16 characters to minimize the potential for receiver overrun and to
reduce interrupt overhead. In addition, a handshaking capability and
in–band flow control are provided to disable a remote UART
transmitter when the receiver buffer is full or nearly so.
To minimize interrupt overhead an interrupt arbitration system is
included which reports the context of the interrupting UART via
direct access or through the modification of the interrupt vector. The
context of the interrupt is reported as channel number, type of
device interrupting ( receiver COS etc.) and, for transmitters or
receivers, the fill level of the FIFO.
The Octal UART provides a power down mode in which the
oscillator is stopped but the register contents are maintained. This
results in reduced power consumption of several orders of
magnitudes. The Octal UART is fully TTL compatible when
operating from a single +5V power supply. Operation at 3.3 volts is
maintained with CMOS interface levels.
The device also offered in a version which maintains TTL input and
output levels while operating with a 3.3 volt power supply.
相關(guān)PDF資料
PDF描述
SC68C198A1A Octal UART with TTL compatibility at 3.3V and 5V supply voltages
SC68C198C1A Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 50 psi, Absolute, flush mount, 10 Vdc excitation
SC68L198 Octal UART with TTL compatibility at 3.3V and 5V supply voltages
SC68L198A1A Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 50 psi, Gage, flush mount with flange, 10 Vdc excitation
SC68L198C1A Octal UART with TTL compatibility at 3.3V and 5V supply voltages
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC68C198A1A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Octal UART with TTL compatibility at 3.3V and 5V supply voltages
SC68C198C1A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Octal UART with TTL compatibility at 3.3V and 5V supply voltages
SC68C2550B 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs and 68 mode mP interface
SC68C2550BIB48 功能描述:UART 接口集成電路 2.5V-5V 2CH UART 16B FIFO MOT RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC68C2550BIB48,128 功能描述:UART 接口集成電路 2.5V-5V 2CH UART 16B RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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