參數(shù)資料
型號(hào)： SC28L198A1
廠商： NXP Semiconductors N.V.
英文描述： Octal UART for 3.3V and 5V supply voltage
中文描述： 八路的UART電源電壓為3.3V和5V
文件頁(yè)數(shù)： 2/56頁(yè)
文件大?。?/td> 345K
代理商： SC28L198A1
Philips Semiconductors
Product specification
SC28L198
Octal UART for 3.3V and 5V supply voltage
2
1999 Jan 14
853–2047 20654
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
3
3
4
4
6
6
7
7
7
7
7
7
7
8
8
8
8
8
8
9
9
9
9
9
9
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
10
10
10
10
10
10
11
11
12
9
8
8
12
12
12
12
13
13
13
13
14
14
15
15
15
18
18
18
13
30
31
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . . . .
Register Map Summary
Register Map Detail
Reset Conditions
Device Configuration after Hardware Reset or CRa cmd=x1F
Cleared registers:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clears Modes for:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disables:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halts:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limitations:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Specifications (5V)
AC Electrical Characteristic (5V)
DC Electrical Specifications (3.3V)
AC Electrical Characteristics (3.3V)
INDEX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
32
41
41
41
41
41
41
41
42
43
45
46
52
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .
. . . . . . . . . . . .
. . . . . . . . . .
. . . . . . . . . .
DESCRIPTION
The Philips 28L198 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.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC28L198A1A 功能描述:UART 接口集成電路 UART OCTAL W/FIFO 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
SC28L198A1A,512 功能描述:UART 接口集成電路 UART OCTAL W/FIFO 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
SC28L198A1A,518 功能描述:UART 接口集成電路 3V-5V 8CH UART INTEL/MOT INTRF 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
SC28L198A1A,529 功能描述:UART 接口集成電路 3V-5V 8CH UART 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
SC28L198A1A-S 功能描述:UART 接口集成電路 3V-5V 8CH UART INTEL/MOT INTRF 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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