Datasheet

MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
MOTOROLA Configuration Register (CONFIG) 55
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Data Sheet — MC68HC908QY4
Section 5. Configuration Register (CONFIG)
5.1 Contents
5.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
5.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
5.2 Introduction
This section describes the configuration registers (CONFIG1 and
CONFIG2). The configuration registers enable or disable the following
options:
• Stop mode recovery time (32 × BUSCLKX4 cycles or
4096 × BUSCLKX4 cycles)
• STOP instruction
• Computer operating properly module (COP)
• COP reset period (COPRS): (2
13
–2
4
) × BUSCLKX4 or
(2
18
–2
4
) × BUSCLKX4
• Low-voltage inhibit (LVI) enable and trip voltage selection
• OSC option selection
• IRQ
pin
• RST pin
• Auto wake-up timeout period
5.3 Functional Description
The configuration registers are used in the initialization of various
options. The configuration registers can be written once after each reset.