MC68HC05C5 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC68HC05C5

SPECIFICATION (General Release)

Freescale Semiconductor 

Freescale SemicondMuCc6t8oHrC,0I5nCc5.Specification Rev. 1.2

SECTION 2

OPERATING MODES

The MCU has two modes of operation: Single-Chip Mode and Self-Check Mode. Table

2-1 shows the conditions required to go into each mode, where VTST = 2 x VDD.

Table 2-1: Operating Mode Conditions

RESET

IRQ

VSS to VDD

VTST

TCAP

VSS to VDD

VDD

MODE

Single-chip

Self-Check

2.1 SINGLE-CHIP MODE

In Single-Chip Mode, the address and data buses are not available externally, but there

are four 8-bit I/O ports. This mode allows the MCU to function as a self-contained

microcontroller, with maximum use of the pins for on-chip peripheral functions. All

address and data activity occurs within the MCU. Single-Chip Mode is entered on the

rising edge of RESET if the IRQ pin is within normal operating range.

Section 2: Operating Modes

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