Freescale Semiconductor, Inc.
November 5, 1998
GENERAL RELEASE SPECIFICATION
TABLE OF CONTENTS
Section
Page
SECTION 1
GENERAL DESCRIPTION
1.1
1.2
1.3
1.4
FEATURES...................................................................................................... 1-1
MASK OPTIONS.............................................................................................. 1-2
MCU STRUCTURE.......................................................................................... 1-2
FUNCTIONAL PIN DESCRIPTION.................................................................. 1-4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
1.4.9
V
and V ................................................................................................ 1-4
DD SS
OSC1, OSC2 ............................................................................................... 1-4
RESET......................................................................................................... 1-6
IRQ .............................................................................................................. 1-6
3.3V ............................................................................................................. 1-6
D+ and D– ................................................................................................... 1-6
PA0-PA7...................................................................................................... 1-6
PB0-PB2, PB3-PB7 ..................................................................................... 1-7
PC0-PC3...................................................................................................... 1-7
SECTION 2
MEMORY
2.1
2.2
2.3
2.4
I/O AND CONTROL REGISTERS ................................................................... 2-2
RAM ................................................................................................................. 2-2
ROM................................................................................................................. 2-2
I/O REGISTERS SUMMARY ........................................................................... 2-3
SECTION 3
CENTRAL PROCESSING UNIT
3.1
3.2
3.3
3.4
3.5
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
REGISTERS .................................................................................................... 3-1
ACCUMULATOR (A)........................................................................................ 3-2
INDEX REGISTER (X)..................................................................................... 3-2
STACK POINTER (SP).................................................................................... 3-2
PROGRAM COUNTER (PC) ........................................................................... 3-2
CONDITION CODE REGISTER (CCR)........................................................... 3-3
Half Carry Bit (H-Bit).................................................................................... 3-3
Interrupt Mask (I-Bit).................................................................................... 3-3
Negative Bit (N-Bit)...................................................................................... 3-3
Zero Bit (Z-Bit) ............................................................................................. 3-3
Carry/Borrow Bit (C-Bit)............................................................................... 3-4
SECTION 4
INTERRUPTS
4.1
4.2
4.3
4.4
INTERRUPT VECTORS .................................................................................. 4-1
INTERRUPT PROCESSING............................................................................ 4-2
RESET INTERRUPT SEQUENCE .................................................................. 4-4
SOFTWARE INTERRUPT (SWI)..................................................................... 4-4
MC68HC05JB3
REV 1
MOTOROLA
i
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