CM68HC05C4ACFB Motorola / Freescale Semiconductor, CM68HC05C4ACFB Datasheet - Page 91

• Manufacturer Part Number: CM68HC05C4ACFB
• Description: Microcontroller
• Manufacturer: Motorola / Freescale Semiconductor

General Release Specification — MC68HC05C4A
11.1 Contents
11.2 Introduction
11.3 User Mode
MC68HC05C4A
MOTOROLA
—
Rev. 4.0
11.2
11.3
11.4
11.4.1
11.4.2
The MCU has two modes of operation: user mode and self-check mode.
Table 11-1
where V
In user mode, the address and data buses are not available externally,
but there are three 8-bit input/output (I/O) ports and one 7-bit input-only
port. 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. User
mode is entered on the rising edge of RESET if the IRQ pin is within
normal operating range.
RESET
Introduction ...............................................................................91
User Mode ................................................................................91
Self-Check Mode ......................................................................92
TST
Self-Check Tests .................................................................92
Self-Check Results..............................................................93
shows the conditions required to enter into each mode,
= 2 x V
Table 11-1. Operating Mode Conditions
Operating Modes
DD
Section 11. Operating Modes
.
V
SS
V
IRQ
to V
TST
DD
V
SS
TCAP
V
to V
DD
General Release Specification
DD
Self-Check
Mode
User
91