HT68F13 datasheet(18/161 Pages) HOLTEK

18 / 161 page

If the stack is overflow, the first Program Counter save in the stack will be lost.

Device

StackLevels

HT68F13

HT68F14

HT68F15

ArithmeticandLogicUnit

- ALU

The arithmetic-logic unit or ALU is a critical area of the microcontroller that carries out arithmetic

and logic operations of the instruction set. Connected to the main microcontroller data bus, the ALU

receives related instruction codes and performs the required arithmetic or logical operations after

which the result will be placed in the specified register. As these ALU calculation or operations may

result in carry, borrow or other status changes, the status register will be correspondingly updated to

reflect these changes. The ALU supports the following functions:

· Arithmetic operations: ADD, ADDM, ADC, ADCM, SUB, SUBM, SBC, SBCM, DAA

· Logic operations: AND, OR, XOR, , ORM, XORM, CPL, CPLA

· Rotation RRA, RR, RRCA, RRC, RLA, RL, RLCA, RLC

· Increment and Decrement INCA, INC, DECA, DEC

· Branch decision, JMP, SZ, SZA, SNZ, SIZ, SDZ, SIZA, SDZA, CALL, RET, RETI

Rev.1.10

February9,2011

HT68F13/HT68F14/HT68F15

EnhancedI/OFlashType MCU

P r o g r a m C o u n t e r

S t a c k L e v e l 1

S t a c k L e v e l 2

S t a c k L e v e l 3

S t a c k L e v e l N

P r o g r a m

M e m o r y

T o p o f S t a c k

S t a c k

P o i n t e r

B o t t o m o f S t a c k

HT68F13 Scheda tecnica(PDF) 18 Page - Holtek Semiconductor Inc