DSPIC30F4012 datasheet(188/236 Pages) MICROCHIP

188 / 236 page

dsPIC30F4011/4012

DS70135E-page 186

Confidential

FIGURE 24-6:

BAND GAP START-UP TIME CHARACTERISTICS

TABLE 24-20: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT RESET TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.5V to 5.5V

(unless otherwise stated)

Operating temperature

-40°C

≤ TA ≤ +85°C for Industrial

-40°C

≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic(1)

Min

Typ(2)

Max

Units

Conditions

SY10

TmcL

MCLR Pulse Width (low)

—

μs

-40°C to +85°C

SY11

TPWRT

Power-up Timer Period

-40°C to +85°C

User-programmable

SY12

TPOR

Power-on Reset Delay

μs

-40°C to +85°C

SY13

TIOZ

I/O High-Impedance from MCLR

Low or Watchdog Timer Reset

—0.8

1.0

μs

SY20

TWDT1

Watchdog Timer Time-out

Period (no prescaler)

1.4

2.1

2.8

VDD = 5V, -40°C to +85°C

TWDT21.4

2.1

2.8

VDD = 3V, -40°C to +85°C

SY25

TBOR

Brown-out Reset Pulse Width(3)

100

—

μsVDD ≤ VBOR (D034)

SY30

TOST

Oscillation Start-up Timer Period

—

1024 TOSC

——

TOSC = OSC1 period

SY35

TFSCM

Fail-Safe Clock Monitor Delay

—

500

900

μs

-40°C to +85°C

Note 1:

These parameters are characterized but not tested in manufacturing.

Data in “Typ” column is at 5V, 25°C unless otherwise stated.

Refer to Figure 24-1 and Table 24-10 for BOR.

VBGAP

Enable

Band Gap

Stable

Note 1:

Note: Band gap is enabled when FBORPOR<7> is set.

SY40

Band Gap(1)

TABLE 24-21: BAND GAP START-UP TIME REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.5V to 5.5V (unless otherwise stated)

Operating temperature

-40°C

≤ TA ≤ +85°C for Industrial

-40°C

≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic(1)

Min

Typ(2)

Max

Units

Conditions

SY40

TBGAP

Band Gap

Start-up Time

—4065

μs

Defined as the time between the instant

that the band gap is enabled and the

moment that the band gap reference

voltage is stable (RCON<13> status bit)

Note 1:

These parameters are characterized but not tested in manufacturing.

Data in “Typ” column is at 5V, 25°C unless otherwise stated.

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