PIC16CE625-04E/SO Microchip Technology, PIC16CE625-04E/SO Datasheet - Page 54

• Manufacturer Part Number: PIC16CE625-04E/SO
• Description: IC MCU OTP 2KX14 EE COMP 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16CE625-04E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 13
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Connectivity: -

PIC16CE62X
10.4
10.4.1
The on-chip POR circuit holds the chip in reset until
V
tion. To take advantage of the POR, just tie the MCLR
pin through a resistor to V
nal RC components usually needed to create Power-on
Reset. A maximum rise time for V
electrical specifications for details.
The POR circuit does not produce an internal reset
when V
When the device starts normal operation (exits the
reset condition), device operating parameters (voltage,
frequency, temperature, etc.) must be met to ensure
operation. If these conditions are not met, the device
must be held in reset until the operating conditions are
met.
For additional information, refer to Application Note
AN607, “Power-up Trouble Shooting”.
10.4.2
The Power-up Timer provides a fixed 72 ms (nominal)
time-out on power-up only, from POR or Brown-out
Reset. The Power-up Timer operates on an internal RC
oscillator. The chip is kept in reset as long as PWRT is
active. The PWRT delay allows the V
acceptable level. A configuration bit, PWRTE, can
disable (if set) or enable (if cleared or programmed) the
Power-up Timer. The Power-up Timer should always be
enabled when Brown-out Reset is enabled.
FIGURE 10-7: BROWN-OUT SITUATIONS
DS40182C-page 54
DD
has reached a high enough level for proper opera-
DD
Power-on Reset (POR), Power-up
Timer (PWRT), Oscillator Start-up
Timer (OST) and Brown-out Reset
(BOD)
POWER-ON RESET (POR)
POWER-UP TIMER (PWRT)
declines.
Internal
Internal
Internal
Reset
Reset
Reset
V
V
V
DD
DD
DD
DD
. This will eliminate exter-
DD
is required. See
DD
to rise to an
<72 ms
72 ms
The Power-Up Time delay will vary from chip-to-chip
and due to V
See DC parameters for details.
10.4.3
The Oscillator Start-Up Timer (OST) provides a 1024
oscillator cycle (from OSC1 input) delay after the
PWRT delay is over. This ensures that the crystal
oscillator or resonator has started and stabilized.
The OST time-out is invoked only for XT, LP and HS
modes and only on power-on reset or wake-up from
SLEEP.
10.4.4
The PIC16CE62X members have on-chip Brown-out
Reset circuitry. A configuration bit, BOREN, can disable
(if clear/programmed) or enable (if set) the Brown-out
Reset circuitry. If V
parameter D005) for greater than parameter (TBOR) in
Table 13-5, the brown-out situation will reset the chip. A
reset won’t occur if V
parameter (TBOR).
On any reset (Power-on, Brown-out, Watch-dog, etc.)
the chip will remain in reset until V
The Power-up Timer will then be invoked and will keep
the chip in reset an additional 72 ms.
If V
running, the chip will go back into a Brown-out Reset
and the Power-up Timer will be re-initialized. Once V
rises above BV
72 ms reset. The Power-up Timer should always be
enabled when Brown-out Reset is enabled. Figure 10-7
shows typical Brown-out situations.
72 ms
72 ms
DD
drops below BV
OSCILLATOR START-UP TIMER (OST)
BROWN-OUT RESET (BOD)
DD
DD
, temperature and process variation.
, the Power-Up Timer will execute a
DD
DD
DD
falls below 4.0V (refer to
falls below 4.0V for less than
1999 Microchip Technology Inc.
while the Power-up Timer is
BV
BV
BV
DD
DD
DD
DD
rises above BV
BV
DD
DD
DD
.