MAXQ61CA MAXIM [Maxim Integrated Products], MAXQ61CA Datasheet - Page 23

• Manufacturer Part Number: MAXQ61CA
• Description: 16-Bit Microcontroller with Infrared Module
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 4. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled
Figure 11. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled
STATE
A
B
C
D
E
F
INTERNAL RESET
(ACTIVE HIGH)
16-Bit Microcontroller with Infrared Module
POWER-FAIL
(Periodically)
V
V
V
PFW
POR
RST
STOP
On
On
On
On
On
Off
______________________________________________________________________________________
V
DD
A
REGULATOR
INTERNAL
B
Off
Off
On
Off
Off
Off
t < t
PFW
OSCILLATOR
t ≥ t
CRYSTAL
PFW
C
Off
Off
On
Off
Off
Off
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 turns on periodically.
V
Device held in reset. No operation allowed.
DD
RST
DD
POR
DD
> V
> V
< V
D
< V
< V
RST
RST
POR
DD
DD
.
.
.
< V
< V
COMMENTS
PFW
t ≥ t
RST
PFW
.
.
XTAL_RDY
E
F
.
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