Intel 8XC251SA Manuals

Manuals and User Guides for Intel 8XC251SA. We have 2 Intel 8XC251SA manuals available for free PDF download: User Manual, Hardware Description

Intel 8XC251SA User Manual (458 pages)

Embedded Microcontroller

Brand: Intel | Category: Microcontrollers | Size: 2.72 MB

Table of Contents
5
Chapter 1 Guide to this Manual

19
- Manual Contents
  21
- Notational Conventions and Terminology
  23
- Related Documents
  25
  - Data Sheet
    26
  - Application Notes
    26
- Application Support Services
  27
  - World Wide Web
    27
  - Compuserve Forums
    27
  - Faxback Service
    28
  - Bulletin Board System (BBS)
    28
Chapter 2 Architectural Overview

31
- 8Xc251Sa, Sb, Sp, Sq Architecture
  35
- Mcs 251 Microcontroller Core
  36
  - Cpu
    37
  - Clock and Reset Unit
    38
  - Interrupt Handler
    39
  - On-Chip Code Memory
    39
  - On-Chip RAM
    39
- On-Chip Peripherals
  39
Chapter 3 Address Spaces

41
Chapter 4 Device Configuration

63
Chapter 5 Programming

81
- Source Mode or Binary Mode Opcodes
  83
  - Data Types
    84
    
    Order of Byte Storage for Words and Double Words
    84
  - Register Notation
    84
  - Address Notation
    84
  - Addressing Modes
    86
- Data Instructions
  86
  - Data Addressing Modes
    86
    
    Register Addressing
    87
    
    Immediate
    87
    
    Direct
    87
    
    Indirect
    88
    
    Displacement
    90
  - Arithmetic Instructions
    90
  - Logical Instructions
    91
  - Data Transfer Instructions
    92
- Bit Instructions
  93
  - Bit Addressing
    93
- Control Instructions
  94
  - Addressing Modes for Control Instructions
    95
  - Conditional Jumps
    96
  - Unconditional Jumps
    97
  - Calls and Returns
    97
- Program Status Words
  98
Chapter 6 Interrupt System

103
- Overview
  105
- 8Xc251Sa, Sb, Sp, Sq Interrupt Sources
  107
  - External Interrupts
    107
  - Timer Interrupts
    108
- Programmable Counter Array (Pca) Interrupt
  109
- Serial Port Interrupt
  109
- Interrupt Enable
  109
- Interrupt Priorities
  111
- Interrupt Processing
  113
  - Minimum Fixed Interrupt Time
    114
  - Variable Interrupt Parameters
    114
    
    Response Time Variables
    114
    
    Computation of Worst-Case Latency with Variables
    116
    
    Latency Calculations
    117
    
    Blocking Conditions
    118
    
    Interrupt Vector Cycle
    118
  - Isrs in Process
    119
Chapter 7 Input/Output Ports

121
- Input/Output Port Overview
  123
- I/O Configurations
  124
- Port 1 and Port 3
  124
- Port 0 and Port 2
  124
- Read-Modify-Write Instructions
  127
- Quasi-Bidirectional Port Operation
  128
- Port Loading
  129
- External Memory Access
  129
Chapter 8 Timer/Counters and Watchdog Timer

133
- Timer/Counter Overview
  135
- Timer/Counter Operation
  135
- Timer 0
  137
  - Mode 0 (13-Bit Timer)
    138
  - Mode 1 (16-Bit Timer)
    138
  - Mode 2 (8-Bit Timer with Auto-Reload)
    139
  - Mode 3 (Two 8-Bit Timers)
    139
- Timer 1
  139
  - Mode 0 (13-Bit Timer)
    143
  - Mode 1 (16-Bit Timer)
    143
  - Mode 2 (8-Bit Timer with Auto-Reload)
    143
  - Mode 3 (Halt)
    143
- Timer 0/1 Applications
  143
  - Auto-Load Setup Example
    143
  - Pulse Width Measurements
    144
- Timer 2
  144
  - Capture Mode
    145
  - Auto-Reload Mode
    146
    
    Up Counter Operation
    146
    
    Up/Down Counter Operation
    147
  - Baud Rate Generator Mode
    148
  - Clock-Out Mode
    148
- Watchdog Timer
  150
  - Description
    150
  - Using the WDT
    152
  - WDT During Idle Mode
    152
  - WDT During Powerdown
    152
Chapter 9 Programmable Counter Array

153
- Pca Description
  155
  - Alternate Port Usage
    156
- Pca Timer/Counter
  156
- Pca Compare/Capture Modules
  159
  - 16-Bit Capture Mode
    159
  - Compare Modes
    161
  - 16-Bit Software Timer Mode
    161
  - High-Speed Output Mode
    162
  - PCA Watchdog Timer Mode
    163
  - Pulse Width Modulation Mode
    165
Chapter 10 Serial I/O Port

171
- Overview
  173
- Modes of Operation
  176
  - Synchronous Mode (Mode 0)
    176
    
    Transmission (Mode 0)
    176
    
    Reception (Mode 0)
    177
  - Asynchronous Modes (Modes 1, 2, and 3)
    178
    
    Transmission (Modes 1, 2, 3)
    178
    
    Reception (Modes 1, 2, 3)
    178
- Framing Bit Error Detection (Modes 1, 2, and 3)
  179
- Multiprocessor Communication (Modes 2 and 3)
  179
- Automatic Address Recognition
  179
  - Given Address
    180
  - Broadcast Address
    181
  - Reset Addresses
    182
- Baud Rates
  182
Chapter 11 Minimum Hardware Setup

187
- Electrical Environment
  190
  - Power and Ground Pins
    190
  - Unused Pins
    190
  - Noise Considerations
    190
- Clock Sources
  191
  - On-Chip Oscillator (Crystal)
    191
  - On-Chip Oscillator (Ceramic Resonator)
    192
  - External Clock
    192
- Reset
  193
  - Externally Initiated Resets
    194
  - WDT Initiated Resets
    194
  - Reset Operation
    194
  - Power-On Reset
    195
Chapter 12 Special Operating Modes

197
- General
  199
- Power Control Register
  199
  - Serial I/O Control Bits
    199
  - Power off Flag
    199
- Idle Mode
  202
  - Entering Idle Mode
    202
  - Exiting Idle Mode
    203
- Powerdown Mode
  203
  - Entering Powerdown Mode
    204
  - Exiting Powerdown Mode
    204
- On-Circuit Emulation (Once) Mode
  205
  - Entering ONCE Mode
    205
  - Exiting ONCE Mode
    205
Chapter 13 External Memory Interface

207
Chapter 14

241
- Programming and Verifying
  241
- Nonvolatile Memory
  241
- General
  241
  - Programming Considerations for On-Chip Code Memory
    242
  - EPROM Devices
    243
- Programming and Verifying Modes
  243
- General Setup
  243
- Programming Algorithm
  245
- Verify Algorithm
  246
- Programmable Functions
  246
  - On-Chip Code Memory
    247
  - Configuration Bytes
    247
  - Lock Bit System
    247
  - Encryption Array
    248
  - Signature Bytes
    248
- Verifying the 83C251Sa, Sb, Sp, Sq (Rom)
  249
Appendix A Instruction Set Reference

251
- Instruction Set Summary
  263
  - Execution Times for Instructions that Access the Port Sfrs
    263

Intel 8XC251SA Hardware Description (20 pages)

Addendum to the 8xC251SA, 8xC251SB, 8xC251SP, 8xC251SQ, User’s Manual

Brand: Intel | Category: Computer Hardware | Size: 0.58 MB

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More Intel Manuals

Intel 8XC251SA Manuals

Intel 8XC251SA User Manual (458 pages)

Table of Contents

Chapter 1 Guide to this Manual

Chapter 2 Architectural Overview

Chapter 3 Address Spaces

Chapter 4 Device Configuration

Chapter 5 Programming

Chapter 6 Interrupt System

Chapter 7 Input/Output Ports

Chapter 8 Timer/Counters and Watchdog Timer

Chapter 9 Programmable Counter Array

Chapter 10 Serial I/O Port

Chapter 11 Minimum Hardware Setup

Chapter 12 Special Operating Modes

Chapter 13 External Memory Interface

Chapter 14

Appendix A Instruction Set Reference

Intel 8XC251SA Hardware Description (20 pages)

Table of Contents

1 INTRODUCTION to the 8Xc251Tx

2 Signal Summary

3 The Second Serial I/O Port

4 Extended Data Float Timing

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