s908gr32ag3vfa Freescale Semiconductor, Inc, s908gr32ag3vfa Datasheet - Page 129

• Manufacturer Part Number: s908gr32ag3vfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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
Table
rises above the rising trip point voltage, V
by the hysteresis voltage, V
11-1). Reset clears the LVIOUT bit.
Address:
The microcontroller is guaranteed to operate at a minimum supply voltage.
The trip point (V
Chapter 20 Electrical Specifications
Reset:
Read:
Write:
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
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
DD
< V
[5 V] or V
V
> V
< V
.
DD
DD
DD
DD
TRIPR
TRIPF
5
0
0
< V
fall below V
is approximately equal to V
TRIPR
TRIPR
TRIPF
DD
DD
NOTE
voltage falls below the V
4
0
0
for the actual trip point voltages.
. 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 (see
is greater than
Bit 0
TRIPF
0
0
LVI Status Register
level.
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