參數(shù)資料
型號： MC68HC2681P
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 67/88頁
文件大小： 726K
代理商： MC68HC2681P
TABLE OF CONTENTS (Continued)
Paragraph
Page
Number
Title
Number
viii
MC68HC681 USER’S MANUAL
MOTOROLA
4.3.15.4
Channel B Transmitter Ready — ISR[4]....................... 4-23
4.3.15.5
Counter/Timer Ready — ISR[3].................................... 4-23
4.3.15.6
Channel A Change in Break — ISR[2]. ........................ 4-23
4.3.15.7
Channel A Receiver Ready or FIFO Full — ISR[1]. ..... 4-23
4.3.15.8
Channel A Transmitter Ready — ISR[0]....................... 4-23
4.3.16
Interrupt Mask Register (IMR).................................................. 4-23
4.3.17
Count Registers (CUR and CLR) ............................................. 4-24
4.3.18
Counter/Timer Preload Registers (CTUR and CTLR).............. 4-24
4.3.19
Interrupt Vector Register (IVR)................................................. 4-24
Section 5
Electrical Specifications
5.1
Absolute Maximum Ratings ................................................................. 5-1
5.2
Thermal Characteristics ....................................................................... 5-1
5.3
Power Considerations .......................................................................... 5-1
5.4
DC Electrical Characteristics................................................................ 5-2
5.5
AC Electrical Characteristics................................................................ 5-3
5.5.1
Clock Timing .............................................................................. 5-3
5.5.2
RESET Timing ........................................................................... 5-4
5.5.3
Read and Write Bus Cycle Timing ............................................. 5-4
5.5.4
Interrupt Bus Cycle Timing......................................................... 5-5
5.5.5
Port Timing................................................................................. 5-7
5.5.6
Interrupt Reset Timing................................................................ 5-8
5.5.7
Transmitter Timing ..................................................................... 5-8
5.5.8
Receiver Timing ......................................................................... 5-9
5.5.9
Transmit And Receive Operation ............................................. 5-10
Section 6
Mechanical Data and Ordering Information
6.1
Pin Assignments .................................................................................. 6-1
6.2
Ordering Information ............................................................................ 6-1
6.3
Package Dimensions ........................................................................... 6-2
6.4
Pin Assignment–40 Pin Dual-In-Line Plastic Package.......................... 6-3
6.5
Ordering Information ............................................................................. 6-3
6.6
Package Dimensions–40 Pin Dual-In-Line Package............................. 6-4
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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