
Operating Modes
Contents
MC68HC(7)05H12
—
Rev. 1.0
General Release Specification
MOTOROLA
Operating Modes
75
L
G
R
6.1 Contents
6.2
6.3
6.4
6.5
6.5.1
6.5.2
6.5.3
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
WAIT Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Data Retention Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Slow Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
6.2 Introduction
The normal operating mode of the MC68HC(7)05H12 is user (or single
chip) mode. There is also a monitor (or bootloader) mode, primarily for
programming and evaluation purpose. In addition to these modes, there
are three low power modes which may be entered and exited at will from
user mode: WAIT, Data Retention and Slow Mode.
Table 6-1
shows the
conditions required to enter the modes of operation on the rising edge of
RESET, were V
TST
= 2 x V
DD
.
Table 6-1. Operating Mode Entry Conditions
6.3 User Mode
This is the intended mode of operation for executing user firmware. All
user mode functions are explained in this specification.
General Release Specification — MC68HC(7)05H12
Section 6. Operating Modes
IRQ
PB0
Mode
V
SS
to V
DD
V
SS
to V
DD
User
V
TST
V
DD
Monitor