mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 307

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

17.4.1 Polled LVI Operation
17.4.2 Forced Reset Operation
17.4.3 False Reset Protection
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
$FE0F
Addr.
LVI Status and Control Regis-
Register Name
See page 308.
In applications that can operate at V
monitor V
LVIPWR bit must be at logic 1 to enable the LVI module, and the LVIRST
bit must be at logic 0 to disable LVI resets. TRPSEL in the LVISCR
selects V
In applications that require V
resets allows the LVI module to reset the MCU when V
V
consecutive CPU cycles. In the CONFIG register, the LVIPWR and
LVIRST bits must be at logic 1 to enable the LVI module and to enable
LVI resets. TRPSEL in the LVISCR selects V
The V
supply noise. In order for the LVI module to reset the MCU, V
remain at or below V
must be above V
out of reset. TRPSEL in the LVISCR selects V
(LVISCR)
LVRX
Figure 17-2. LVI I/O Register Summary
DD
ter
level and remains at or below that level for nine or more
LVRX
pin level is digitally filtered to reduce false resets due to power
Read
DD
Write
Re-
set:
by polling the LVIOUT bit. In the configuration register, the
Low-Voltage Inhibit (LVI)
:
:
. See
Bit 7
OUT
LVI-
LVRX
R
R
0
5.4 CONFIG
LVRX
+ V
= Reserved
R
6
0
0
LVHX
for nine or more consecutive CPU cycles. V
DD
TRPS-
for only one CPU cycle to bring the MCU
EL
5
0
to remain above V
Bits.
DD
levels below V
R
4
0
0
LVRX
R
3
0
0
LVRX
.
LVRX
Low-Voltage Inhibit (LVI)
+ V
LVRX
Functional Description
R
2
0
0
DD
LVHX
, enabling LVI
, software can
falls to the
Technical Data
.
R
1
0
0
DD
must
Bit 0
R
0
0
307
DD