MAXQ613 Maxim, MAXQ613 Datasheet - Page 23

• Manufacturer Part Number: MAXQ613
• Description: The MAXQ613 is a low-power, 16-bit MAXQ® microcontroller designed for low-power applications including universal remote controls, consumer electronics, and white goods
• Manufacturer: Maxim

Table 4. Power-Fail Detection States During Normal Operation
STATE
G
A
B
C
D
H
E
F
I
16-Bit Microcontroller with Infrared Module
POWER-FAIL
(Periodically)
(Periodically)
On
On
On
On
On
On
On
On
Off
______________________________________________________________________________________
REGULATOR
INTERNAL
Off
On
On
On
On
Off
On
Off
Off
OSCILLATOR
CRYSTAL
Off
On
On
On
On
Off
On
Off
Off
RETENTION
SRAM
Yes
Yes
—
—
—
—
—
—
—
V
V
Crystal warmup time, t
CPU held in reset.
V
CPU normal operation.
Power drop too short.
Power-fail not detected.
V
PFI is set when V
maintains this state for at least t
which time a power-fail interrupt is gener-
ated (if enabled).
CPU continues normal operation.
V
Power-fail detected.
CPU goes into reset.
Power-fail monitor turns on periodically.
V
Crystal warmup time, t
CPU resumes normal operation from 8000h.
V
Power-fail detected.
CPU goes into reset.
Power-fail monitor turns on periodically.
V
Device held in reset. No operation allowed.
DD
POR
DD
RST
POR
DD
POR
DD
< V
> V
> V
< V
< V
< V
< V
< V
POR
RST
RST
POR
DD
DD
DD
DD
.
.
.
.
< V
< V
< V
< V
COMMENTS
PFW
RST
RST
RST
RST
.
.
.
.
< V
XTAL_RDY
XTAL_RDY
DD
< V
PFW
PFW
.
.
, at
and
23