Resumen del contenido incluido en la página 1
8XC251SA, 8XC251SB, 8XC251SP, 8XC251SQ
Embedded Microcontroller Users Manual
27279502.qxd 6/18/96 9:25 AM Page 1
8XC251SA, 8XC251SB,
8XC251SP, 8XC251SQ
Embedded Microcontroller
Users Manual
Resumen del contenido incluido en la página 2
Resumen del contenido incluido en la página 3
8XC251SA, 8XC251SB, 8XC251SP, 8XC251SQ Embedded Microcontroller User’s Manual May 1996 Order Number 272795-002
Resumen del contenido incluido en la página 4
Information in this document is provided in connection with Intel products. Intel assumes no liability whatsoever, including in- fringement of any patent or copyright, for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products. Intel retains the right to make changes to these specifications at any time, without notice. Microcontroller products may have minor variations to this specification known as errata. *Other brands and names are the pro
Resumen del contenido incluido en la página 5
CONTENTS CHAPTER 1 GUIDE TO THIS MANUAL 1.1 MANUAL CONTENTS ................................................................................................... 1-1 1.2 NOTATIONAL CONVENTIONS AND TERMINOLOGY ................................................ 1-3 1.3 RELATED DOCUMENTS .............................................................................................. 1-5 1.3.1 Data Sheet ......................................................................................................
Resumen del contenido incluido en la página 6
8XC251SA, SB, SP, SQ USER’S MANUAL 3.3.2.3 Extended Stack Pointer, SPX ............................................................................3-15 3.4 SPECIAL FUNCTION REGISTERS (SFRS) ............................................................... 3-16 CHAPTER 4 DEVICE CONFIGURATION 4.1 CONFIGURATION OVERVIEW .................................................................................... 4-1 4.2 DEVICE CONFIGURATION .....................................................................
Resumen del contenido incluido en la página 7
CONTENTS 5.4 BIT INSTRUCTIONS ................................................................................................... 5-11 5.4.1 Bit Addressing .........................................................................................................5-11 5.5 CONTROL INSTRUCTIONS ....................................................................................... 5-12 5.5.1 Addressing Modes for Control Instructions .............................................................5-13 5.
Resumen del contenido incluido en la página 8
8XC251SA, SB, SP, SQ USER’S MANUAL 8.2 TIMER/COUNTER OPERATION................................................................................... 8-1 8.3 TIMER 0......................................................................................................................... 8-3 8.3.1 Mode 0 (13-bit Timer) ...............................................................................................8-4 8.3.2 Mode 1 (16-bit Timer) ..........................................................
Resumen del contenido incluido en la página 9
CONTENTS 10.2 MODES OF OPERATION............................................................................................ 10-4 10.2.1 Synchronous Mode (Mode 0) ..................................................................................10-4 10.2.1.1 Transmission (Mode 0) ......................................................................................10-4 10.2.1.2 Reception (Mode 0) ............................................................................................10-5 10.
Resumen del contenido incluido en la página 10
8XC251SA, SB, SP, SQ USER’S MANUAL 12.2.2 Power Off Flag ........................................................................................................12-1 12.3 IDLE MODE ................................................................................................................. 12-4 12.3.1 Entering Idle Mode ..................................................................................................12-4 12.3.2 Exiting Idle Mode ..............................................
Resumen del contenido incluido en la página 11
CONTENTS CHAPTER 14 PROGRAMMING AND VERIFYING NONVOLATILE MEMORY 14.1 GENERAL.................................................................................................................... 14-1 14.1.1 Programming Considerations for On-chip Code Memory .......................................14-2 14.1.2 EPROM Devices .....................................................................................................14-3 14.2 PROGRAMMING AND VERIFYING MODES....................................
Resumen del contenido incluido en la página 12
8XC251SA, SB, SP, SQ USER’S MANUAL FIGURES Figure Page 2-1 Functional Block Diagram of the 8XC251SA, SB, SP, SQ...........................................2-2 2-2 The CPU.......................................................................................................................2-5 2-3 Clocking Definitions......................................................................................................2-6 3-1 Address Spaces for MCS® 251 Microcontrollers .............................
Resumen del contenido incluido en la página 13
CONTENTS FIGURES Figure Page 8-12 T2CON: Timer 2 Control Register ..............................................................................8-17 9-1 Programmable Counter Array.......................................................................................9-3 9-2 PCA 16-bit Capture Mode ............................................................................................9-6 9-3 PCA Software Timer and High-speed Output Modes...................................................9-8 9
Resumen del contenido incluido en la página 14
8XC251SA, SB, SP, SQ USER’S MANUAL FIGURES Figure Page 13-23 Bus Diagram for Example 4: 87C251SB/83C251SB in Nonpage Mode ..................13-24 13-24 Address Space for Example 4..................................................................................13-25 13-25 Bus Diagram for Example 5: 80C251SB in Nonpage Mode.....................................13-27 13-26 Address Space for Examples 5 and 6 ......................................................................13-28 13-27 Bus Diagra
Resumen del contenido incluido en la página 15
CONTENTS TABLES Table Page 1-1 Intel Application Support Services................................................................................1-7 2-1 8XC251SA, SB, SP, SQ Features................................................................................2-3 3-1 Address Mappings........................................................................................................3-4 3-2 Minimum Times to Fetch Two Bytes of Code..............................................................
Resumen del contenido incluido en la página 16
8XC251SA, SB, SP, SQ USER’S MANUAL TABLES Table Page 10-4 Timer 1 Generated Baud Rates for Serial I/O Modes 1 and 3..................................10-12 10-5 Selecting the Baud Rate Generator(s) .....................................................................10-13 10-6 Timer 2 Generated Baud Rates ...............................................................................10-14 12-1 Pin Conditions in Various Modes.........................................................................
Resumen del contenido incluido en la página 17
CONTENTS TABLES Table Page C-4 Serial I/O SFRs ...........................................................................................................C-4 C-5 Timer/Counter and Watchdog Timer SFRs .................................................................C-4 C-6 Programmable Counter Array (PCA) SFRs.................................................................C-5 C-7 Register File .......................................................................................................
Resumen del contenido incluido en la página 18
Resumen del contenido incluido en la página 19
1 Guide to This Manual
Resumen del contenido incluido en la página 20
