MAXQ610 Maxim, MAXQ610 Datasheet - Page 24

• Manufacturer Part Number: MAXQ610
• Description: The MAXQ610 is a low-power, 16-bit MAXQ® microcontroller designed for low-power applications including universal remote controls, consumer electronics, and white goods
• Manufacturer: Maxim

16-Bit Microcontroller with Infrared Module
Figure 12. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled
Table 5. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled
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STATE
A
B
C
D
E
F
______________________________________________________________________________________
INTERNAL RESET
(ACTIVE HIGH)
POWER-FAIL
(Periodically)
V
V
V
PFW
POR
RST
STOP
On
On
On
On
On
Off
V
DD
A
REGULATOR
INTERNAL
Off
Off
On
Off
Off
Off
B
t < t
PFW
OSCILLATOR
CRYSTAL
t ≥ t
Off
Off
On
Off
Off
Off
PFW
C
RETENTION
SRAM
Yes
Yes
Yes
Yes
Yes
—
Application enters stop mode.
V
CPU in stop mode.
Power drop too short.
Power-fail not detected.
V
Power-fail warning detected.
Turn on regulator and crystal.
Crystal warmup time, t
Exit stop mode.
Application enters stop mode.
V
CPU in stop mode.
V
Power-fail detected.
CPU goes into reset.
Power-fail monitor is turned on periodically.
V
Device held in reset. No operation allowed.
DD
RST
DD
POR
DD
> V
> V
< V
< V
< V
RST.
RST.
POR.
DD
DD
< V
< V
D
PFW.
RST.
COMMENTS
XTAL_RDY
t ≥ t
PFW
.
E
F