Owner manual

102
T48C862-R8
4590B–4BMCU–02/03
Components of Microcontroller Core ............................................... 14
Program Memory ................................................................................................14
RAM ....................................................................................................................15
Expression Stack ..........................................................................................15
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