mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 51

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

5.1 Introduction
5.2 Functional Description
MC68HC908QF4 — Rev. 1.0
MOTOROLA
Data Sheet — MC68HC908QF4
This section describes the configuration registers (CONFIG1 and CONFIG2). The
configuration registers enable or disable the following options:
The configuration registers are used in the initialization of various options. The
configuration registers can be written once after each reset. Exceptions are bits
LVDLVR and LVIRSTD which may be written at any time. Most of the configuration
register bits are cleared during reset. Since the various options affect the operation
of the microcontroller unit (MCU) it is recommended that this register be written
immediately after reset. The configuration registers are located at $001E and
$001F, and may be read at anytime.
Address: $001E
•
•
•
•
•
•
•
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Reset:
Read:
Write:
POR:
Stop mode recovery time (32 × BUSCLKX4 cycles or
4096 × BUSCLKX4 cycles)
STOP instruction
Computer operating properly module (COP)
COP reset period (COPRS): (2
(2
Low-voltage inhibit (LVI) enable and trip voltage selection
OSC option selection
IRQ pin
RST pin
Auto wakeup timeout period
Freescale Semiconductor, Inc.
18
For More Information On This Product,
IRQPUD
–2
Bit 7
R
0
0
4
) × BUSCLKX4
Figure 5-1. Configuration Register 2 (CONFIG2)
Configuration Register (CONFIG)
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= Reserved
IRQEN
Section 5. Configuration Register (CONFIG)
6
0
0
R
5
0
0
U = Unaffected
OSCOPT1
13
4
0
0
–2
4
) × BUSCLKX4 or
OSCOPT0
3
0
0
R
2
0
0
R
1
0
0
Data Sheet
RSTEN
Bit 0
U
0
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