MAXQ610_09 MAXIM [Maxim Integrated Products], MAXQ610_09 Datasheet - Page 23

• Manufacturer Part Number: MAXQ610_09
• Description: 16-Bit Microcontroller with Infrared Module
• Manufacturer: MAXIM [Maxim Integrated Products]

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
STATE
A
B
C
D
E
F
INTERNAL RESET
(ACTIVE HIGH)
POWER-FAIL
(Periodically)
V
V
V
16-Bit Microcontroller with Infrared Module
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
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