HC805K3GRSSLASHD datasheet(36/119 Pages) NXP

Part #	HC805K3GRS/D

Description	The low-cost MC68HC805K3 microcontroller is a member of the M68HC805 Family of microprocessors.

PDF	119 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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36 / 119 page

General Release Speciﬁcation

Registers

MC68HC805K3 — Rev. 1.0

Central Processing Unit Core

3.3 Registers

The MCU contains five registers that are hard-wired within the CPU and

are not part of the memory map. These five registers are shown in

Figure 3-1.

Figure 3-1. M68HC05 Programming Model

For a more complete description of the M68HC05 CPU functions, refer

M6805 HMOS, M146805 CMOS Family User’s Manual

(M6805UM(AD3),

HC05 Applications Guide (M68HC05AG/AD), or

Understanding Small Microcontrollers (M68HC05TB/D). Any specific

differences in the operation of all CPU registers or bits is described in the

following sections.

CONDITION CODE REGISTER

STACK POINTER

111

HALF-CARRY BIT (FROM BIT 3)

INTERRUPT MASK

NEGATIVE BIT

ZERO BIT

CARRY BIT

PROGRAM COUNTER

INDEX REGISTER

ACCUMULATOR

000000

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC805K3GRS/D Datasheet(PDF) 36 Page - NXP Semiconductors