mc68hc908ey16a Freescale Semiconductor, Inc, mc68hc908ey16a Datasheet - Page 64

• Manufacturer Part Number: mc68hc908ey16a
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Configuration Registers (CONFIG1, CONFIG2, CONFIG3)
COPRS — COP Rate Select Bit
LVISTOP — LVI Enable in Stop Mode Bit
LVIRSTD — LVI Reset Disable Bit
LVIPWRD — LVI Power Disable Bit
LVI5OR3 — LVI 5-V or 3-V Operating Mode Bit
SSREC — Short Stop Recovery Bit
64
COPRS selects the COP timeout period. Reset clears COPRS. See
Properly.
When the LVIPWRD bit is clear, setting the LVISTOP bit enables the LVI to operate during stop mode.
Reset clears LVISTOP.
LVIRSTD disables the reset signal from the LVI module. See
Module.
LVIPWRD disables the LVI module. See
LVI5OR3 selects the voltage operating mode of the LVI module. See
(LVI)
to operate the LVI in 3-V mode if desired. See
trip points for each of the modes.
SSREC enables the CPU to exit stop mode with a delay of 32 CGMXCLK cycles instead of a
4096-CGMXCLK cycle delay.
1 = COP timeout period = 8176 CGMXCLK cycles
0 = COP timeout period = 262,128 CGMXCLK cycles
1 = LVI enabled during stop mode
0 = LVI disabled during stop mode
1 = LVI module resets disabled
0 = LVI module resets enabled
1 = LVI module power disabled
0 = LVI module power enabled
1 = LVI operates in 5-V mode.
0 = LVI operates in 3-V mode.
1 = Stop mode recovery after 32 CGMXCLK cycles
0 = Stop mode recovery after 4096 CGMXCLCK cycles
Module. The voltage mode selected for the LVI will typically be 5 V. However, users may choose
Address:
Reset:
The LVI5OR3 bit is cleared by a power-on reset (POR) only. Other resets
will leave this bit unaffected.
Exiting stop mode by an LVI reset will result in the long stop recovery.
Read:
Write:
COPRS
1. The LVI5OR3 bit is cleared only by a power-on reset (POR).
$001F
Bit 7
0
Figure 5-1. Configuration Register 1 (CONFIG1)
MC68HC908EY16A • MC68HC908EY8A Data Sheet, Rev. 1
LVISTOP
6
0
LVIRSTD
5
0
Chapter 11 Low-Voltage Inhibit (LVI)
Chapter 20 Electrical Specifications
NOTE
NOTE
LVIPWRD
4
0
LVI5OR3
3
0
Chapter 11 Low-Voltage Inhibit (LVI)
(1)
SSREC
Chapter 6 Computer Operating
2
0
Chapter 11 Low-Voltage Inhibit
STOP
1
0
Module.
Freescale Semiconductor
for the LVI’s voltage
COPD
Bit 0
0