Document Outline

• Z8® CPU
  • Revision History
  • Table of Contents
  • Z8® CPU Product Overview
    • Key Features
    • Product Development Support
  • Address Space
    • Introduction
    • Z8® CPU Standard Register File
      • General-Purpose Registers
      • RAM Protect
      • Working Register Groups
      • Error Conditions
    • Z8 Expanded Register File
    • Z8® Control and Peripheral Registers
      • Standard Z8 Registers
      • Expanded Z8 Registers
    • Program Memory
    • Z8® External Memory
      • External Data Memory
    • Z8® Stacks
  • Clock
    • Frequency Control
    • Clock Control
      • SCLK ÷ TCLK Divide-By-16 Select
      • External Clock Divide-By-Two
    • Oscillator Control
    • Oscillator Operation
      • Layout
      • Indications of an Unreliable Design
      • Circuit Board Design Rules
      • Crystals and Resonators
    • LC Oscillator
    • RC Oscillator
  • Reset
    • Reset Pin, Internal POR Operation
  • Watchdog Timer
    • Power-On Reset
  • Input/Output Ports
    • Mode Registers
    • Input and Output Registers
    • Port 0
      • General I/O Mode
      • Read/Write Operations
      • Handshake Operation
    • Port 1
      • General I/O Mode
      • Read/Write Operations
      • Handshake Operations
    • Port 2
      • General Port I/O
      • Read/Write Operations
      • Handshake Operation
    • Port 3
      • General Port I/O
      • Read/Write Operations
      • Special Functions
    • Port Handshake
    • I/O Port Reset Conditions
      • Full Reset
    • Analog Comparators
      • Comparator Description
      • Comparator Programming
      • Comparator Operation
      • Interrupts
      • Comparator Definitions
      • Run Mode
      • Halt Mode
      • Stop Mode
    • Open-Drain Configuration
    • Low EMI Emission
    • Input Protection
    • Z8® CMOS Autolatches
      • Autolatch Model
      • Design Considerations
  • Counters and Timers
    • Prescalers and Counter/Timers
    • Counter/Timer Operation
      • Load and Enable Count Bits
      • Prescaler Operations
    • TOUT Modes
    • TIN Modes
      • External Clock Input Mode
      • Gated Internal Clock Mode
      • Triggered Input Mode
      • Retriggerable Input Mode
    • Cascading Counter/Timers
    • Reset Conditions
  • Interrupts
    • Interrupt Sources
      • External Interrupt Sources
      • Internal Interrupt Sources
    • Interrupt Request Register Logic and Timing
    • Interrupt Initialization
      • Interrupt Priority Register Initialization
      • Interrupt Mask Register Initialization
      • Interrupt Request Register Initialization
    • IRQ Software Interrupt Generation
    • Vectored Processing
      • Vectored Interrupt Cycle Timing
      • Nesting of Vectored Interrupts
    • Polled Processing
    • Reset Conditions
  • Power-Down Modes
    • Halt Mode Operation
    • Stop Mode Operation
    • Stop Mode Recovery Register
  • Serial Input/Output
    • UART Introduction
    • UART Bit-Rate Generation
    • UART Receiver Operation
      • Receiver Shift Register
      • Overwrites
      • Framing Errors
      • Parity
    • Transmitter Operation
      • Overwrites
      • Parity
    • UART Reset Conditions
    • Serial Peripheral Interface
    • SPI Operation
    • SPI Compare
    • SPI Clock
    • Receive Character Available and Overrun
  • External Interface
    • Introduction
    • Pin Descriptions
    • External Addressing Configuration
    • External Stacks
    • Data Memory
    • Bus Operation
      • Address Strobe
      • Data Strobe
    • Extended Bus Timing
    • Instruction Timing
    • Z8® Reset Conditions
  • Instruction Set
    • Processor Flags
      • Carry Flag
      • Zero Flag
      • Sign Flag
      • Overflow Flag
      • Decimal Adjust Flag
      • Half Carry Flag
    • Condition Codes
    • Notation and Binary Encoding
      • Assembly Language Syntax
    • Z8® Instruction Summary
      • Op Code Map
  • Instruction Description
    • Add
    • Add With Carry
    • Call Procedure
    • Complement Carry Flag
    • Clear
    • Complement
    • Compare
    • Decimal Adjust
    • Decrement
    • Decrement and Jump if Non-Zero
    • Decrement Word
    • Disable Interrupts
    • Enable Interrupts
    • Halt
    • Increment
    • Increment Word
    • Interrupt Return
    • Jump
    • Jump Relative
    • Load
    • Load Constant
    • Load Constant Autoincrement
    • Load External Data
    • Load External Data Autoincrement
    • No Operation
    • Logical AND
    • Logical OR
    • Logical Exclusive OR
    • POP
    • PUSH
    • Reset Carry Flag
    • Return
    • Rotate Left
    • Rotate Left Through Carry
    • Rotate Right
    • Rotate Right Through Carry
    • Set Carry Flag
    • Set Register Pointer
    • Shift Right Arithmetic
    • STOP
    • Subtract
    • Subtract With Carry
    • Swap Nibbles
    • Test Complement Under Mask
    • Test Under Mask
    • Watchdog Timer
    • Watchdog Timer Enable During Halt Mode
  • Index
  • Customer Support