PIC10F200T-E/P(2014) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC10F200T-E/P Datasheet PDF : 88 Pages
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PIC10F200/202/204/206
9.7 Time-out Sequence, Power-down
and Wake-up from Sleep Status
Bits (TO, PD, GPWUF, CWUF)
The TO, PD, GPWUF and CWUF bits in the STATUS
register can be tested to determine if a Reset condition
has been caused by a power-up condition, a MCLR,
Watchdog Timer (WDT) Reset, wake-up on comparator
change or wake-up on pin change.
TABLE 9-5: TO, PD, GPWUF, CWUF STATUS AFTER RESET
CWUF
GPWUF
TO
PD
Reset Caused By
0
0
0
0
WDT wake-up from Sleep
0
0
0
u
WDT time-out (not from Sleep)
0
0
1
0
MCLR wake-up from Sleep
0
0
1
1
Power-up
0
0
u
u
MCLR not during Sleep
0
1
1
0
Wake-up from Sleep on pin change
1
0
1
0
Wake-up from Sleep on comparator change
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: The TO, PD, GPWUF and CWUF bits maintain their status (u) until a Reset occurs. A low-pulse on the
MCLR input does not change the TO, PD, GPWUF or CWUF Status bits.
9.8 Reset on Brown-out
A Brown-out Reset is a condition where device power
(VDD) dips below its minimum value, but not to zero,
and then recovers. The device should be reset in the
event of a brown-out.
To reset PIC10F200/202/204/206 devices when a
Brown-out Reset occurs, external brown-out protection
circuits may be built, as shown in Figure 9-7 and
Figure 9-8.
FIGURE 9-7:
VDD
33k
10k
BROWN-OUT
PROTECTION CIRCUIT 1
VDD
Q1 MCLR(2) PIC10F20X
40k(1)
FIGURE 9-8:
VDD
R1
R2
BROWN-OUT
PROTECTION CIRCUIT 2
VDD
Q1 MCLR(2) PIC10F20X
40k(1)
Note 1:
This brown-out circuit is less expensive,
although less accurate. Transistor Q1 turns
off when VDD is below a certain level such
that:
VDD •
R1
= 0.7V
R1 + R2
2: Pin must be confirmed as MCLR.
Note 1:
2:
This circuit will activate Reset when VDD goes
below Vz + 0.7V (where Vz = Zener voltage).
Pin must be confirmed as MCLR.
DS40001239F-page 42
2004-2014 Microchip Technology Inc.
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