Rainbow Electronics ATAR862-3 - Manual (Page 100)

100
ATAR862-3
4556B–4BMCU–02/03
Return Stack ................................................................................................. 15
Registers ............................................................................................................. 16
Program Counter (PC) ..................................................................................16
RAM Address Registers ................................................................................ 17
Expression Stack Pointer (SP) ...................................................................... 17
Return Stack Pointer (RP) ............................................................................17
RAM Address Registers (X and Y) ...............................................................17
Top of Stack (TOS) ....................................................................................... 17
Condition Code Register (CCR) .................................................................... 17
Carry/Borrow (C) ........................................................................................... 17
Branch (B) ..................................................................................................... 17
Interrupt Enable (I) ........................................................................................ 17
ALU ..................................................................................................................... 18
I/O Bus ................................................................................................................ 18
Instruction Set ..................................................................................................... 18
Interrupt Structure ...............................................................................................18
Interrupt Processing ...................................................................................... 19
Interrupt Latency ........................................................................................... 19
Software Interrupts ............................................................................................. 20
Hardware Interrupts ............................................................................................ 20
Master Reset ....................................................................................... 21
Power-on Reset and Brown-out Detection .........................................................21
Watchdog Reset ................................................................................................. 22
External Clock Supervisor ..................................................................................22
Voltage Monitor ................................................................................... 22
Voltage Monitor Control/ Status Register ...................................................... 23
Clock Generation ................................................................................ 24
Clock Module ......................................................................................................24
Oscillator Circuits and External Clock Input Stage ............................................. 25
RC-oscillator 1 Fully Integrated ..................................................................... 25
External Input Clock ...................................................................................... 26
RC-oscillator 2 with External Trimming Resistor ........................................... 26
4-MHz Oscillator ........................................................................................... 27
32-kHz Oscillator ........................................................................................... 27
Clock Management ............................................................................................. 28
Clock Management Register (CM) ................................................................ 28
System Configuration Register (SC) ............................................................. 29
Power-down Modes ............................................................................................ 29
Peripheral Modules ............................................................................. 30
Addressing Peripherals ....................................................................................... 30
Bi-directional Ports .............................................................................................. 33
Bi-directional Port 1 ....................................................................................... 33