mc68hc908gp32 Freescale Semiconductor, Inc, mc68hc908gp32 Datasheet - Page 113
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mc68hc908gp32
Manufacturer Part Number
mc68hc908gp32
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908GP32.pdf
(266 pages)
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11.3.3 Voltage Hysteresis Protection
Once the LVI has triggered (by having V
V
continually entering and exiting reset if V
V
11.3.4 LVI Trip Selection
The LVI5OR3 bit in the configuration register selects whether the LVI is configured for 5-V or 3-V
protection.
11.4 LVI Status Register
The LVI status register (LVISR) indicates if the V
LVIOUT — LVI Output Bit
11.5 LVI Interrupts
The LVI module does not generate interrupt requests.
Freescale Semiconductor
DD
TRIPF
This read-only flag becomes set when the V
(See
rises above the rising trip point voltage, V
by the hysteresis voltage, V
Table
Address:
11-1.) Reset clears the LVIOUT bit.
The microcontroller is guaranteed to operate at a minimum supply voltage.
The trip point (V
Chapter 19 Electrical Specifications
Reset:
Read:
Write:
LVIOUT
$FE0C
Bit 7
0
= Unimplemented
Figure 11-3. LVI Status Register (LVISR)
V
TRIPF
TRIPF
6
0
0
V
Table 11-1. LVIOUT Bit Indication
V
HYS
DD
MC68HC908GP32 Data Sheet, Rev. 10
DD
< V
[5 V] or V
V
> V
< V
.
DD
DD
DD
DD
TRIPR
TRIPF
< V
5
0
0
fall below V
is approximately equal to V
TRIPR
TRIPR
TRIPF
DD
NOTE
DD
voltage falls below the V
for the actual trip point voltages.)
4
0
0
. This prevents a condition in which the MCU is
voltage was detected below the V
[3 V]) may be lower than this. (See
TRIPF
Previous value
), the LVI will maintain a reset condition until
3
0
0
LVIOUT
0
1
2
0
0
TRIPF
TRIPF
. V
1
0
0
TRIPR
trip voltage.
is greater than
TRIPF
Bit 0
LVI Status Register
0
0
level.
113
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