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6809E Data sheet

Contents

Introduction

ARCHITECTURAL FEATURES
HARDWARE FEATURES
SOFTWARE FEATURES
MAXIMUM RATINGS
THERMAL CHARACTERISTICS
POWER CONSIDERATIONS
DC ELECTRICAL CHARACTERISTICS
BUS TIMING CHARACTERISTICS (See Notes 1, 2, 3, and 4)
FIGURE 1 - READ/WRITE DATA TO MEMORY OR PERIPHERALS TIMING DIAGRAM
FIGURE 2 - EXPANDED BLOCK DIAGRAM
FIGURE 3 - BUS TIMING TEST LOAD
ORDERING INFORMATION

PROGRAMMlNG MODEL

ACCUMULATORS (A, B, D)
DIRECT PAGE REGISTER (DP)
FIGURE 4 - PROGRAMMING MODEL OF THE MICROPROCESSING UNIT
INDEX REGISTERS (X, Y)
STACK POINTER (U, S)
PROGRAM COUNTER
CONDITION CODE REGISTER
FIGURE 5 - CONDITION CODE REGISTER FORMAT
CONDITION CODE REGISTER DESCRIPTION
CARRY FLAG (C)
OVERFLOW FLAG (V)
ZERO FLAG (Z)
NEGATIVE FLAG (N)
!IRQ MASK (I)
HALF CARRY (H)
!FIRQ MASK (F)
ENTIRE FLAG (E)

PIN DESCRIPTIONS

POWER (Vss, Vcc)
ADDRESS BUS (A0-A15)
DATA BUS (D0-D7)
READ/WRITE (R/!W)
!RESET
!HALT
BUS AVAILABLE, BUS STATUS (BA, BS)
TABLE 1 - MEMORY MAP FOR INTERRUPT VECTORS
NON MASKABLE INTERRUPT (!NMI)
FAST-INTERRUPT REQUEST (!FIRQ)
INTERRUPT REQUEST (!IRQ)
CLOCK INPUTS E, Q
BUSY
AVMA
LIC
TSC

MPU OPERATION

FIGURE 10 - CLOCK GENERATOR
FIGURE 11 - READ-MODIFY-WRITE INSTRUCTION EXAMPLE (ASL EXTENDED INDIRECT)
ADDRESSING MODES
INHERENT (INCLUDES ACCUMULATOR)
IMMEDIATE ADDRESSING
EXTENDED ADDRESSING
EXTENDED INDIRECT
DIRECT ADDRESSING
REGISTER ADDRESSING
INDEXED ADDRESSING
FIGURE. 15 - INDEXED ADDRESSING POSTBYTE REGISTER BIT ASSIGNMENTS
ZERO-OFFSET INDEXED
CONSTANT OFFSET INDEXED
TABLE 2 - INDEXED ADDRESSING MODE
ACCUMULATOR-OFFSET INDEXED
AUTO INCREMENT/DECREMENT INDEXED
INDEXED INDIRECT
RELATIVE ADDRESSING
PROGRAM COUNTER RELATIVE

INSTRUCTION SET

FIGURE 17 - CYCLE-BY-CYCLE PERFORMANCE
TABLE 4 - 8-BIT ACCUMULATOR AND MEMORY INSTRUCTIONS
TABLE 5 - 16-BIT ACCUMULATOR AND MEMORY INSTRUCTIONS
TABLE 6 - INDEX REGISTER / STACK POINTER INSTRUCTIONS
TABLE 7 - BRANCH INSTRUCTIONS
TABLE 8 - MISCELLANEOUS INSTRUCTIONS
TABLE 9 - HEXADECIMAL VALUES OF MACHINE CODES
FIGURE 18 - PROGRAMMING AID
INDEXED ADDRESSING MODES
6809 Vectors

NB: this is a work in progress so not complete.