MC705L16CFUE datasheet(21/146 Pages) FREESCALE

Part #	MC705L16CFUE

Description	Microcontrollers

PDF	146 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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21 / 146 page

Modes of Operation

MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1

Freescale Semiconductor

Figure 1-5. Mode Entry Diagram

1.6.2 Single-Chip Mode (SCM)

In this mode, all address and data bus activity occurs within the MCU. Thus, no external pins are required

for these functions. The single-chip mode allows the maximum number of I/O pins for on-chip peripheral

functions, for example, ports A through E, and LCD drivers.

1.6.3 Self-Check Mode

In this mode, the reset vector is fetched from a 496-byte internal self-check ROM at $FE00–$FFEF. The

self-check ROM contains a self-check program to test the functions of internal modules.

Since this mode is not a normal user mode, all of the privileged control bits are accessible. This allows

the self-check mode to be used for self- test of the device.

VTST

VDD

VSS

VDD

VSS

IRQ2

IRQ1

RESET

SINGLE-CHIP MODE

VTST = 2 x VDD

VDD

VSS

MC705L16CFUE Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc