PIC16LC642-04/SO Microchip Technology, PIC16LC642-04/SO Datasheet - Page 60

• Manufacturer Part Number: PIC16LC642-04/SO
• Description: IC MCU OTP 4KX14 COMP 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16LC642-04/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, WDT
• Number Of I /o: 22
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 176 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: PIC16LC
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 176 B
• Interface Type: RS- 232
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit
• Data Rom Size: 176 B
• Height: 2.31 mm
• Length: 17.87 mm
• Supply Voltage (max): 6 V
• Supply Voltage (min): 3 V
• Width: 7.49 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

PIC16C64X & PIC16C66X
9.4
9.4.1
A Power-on Reset pulse is generated on-chip when
V
take advantage of the POR, just tie the MCLR pin
directly (or through a resistor) to V
eliminate external RC components usually needed to
create a Power-on Reset. A maximum rise time for V
is required. See Electrical Specifications for details.
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. ”
9.4.2
The Power-up Timer provides a fixed 72 ms (nominal)
delay on power-up only, from POR or BOR. 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 V
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 9-8:
DS30559A-page 60
DD
rise is detected (in the range of 1.6V to 1.8V). To
Power-on Reset (POR), Power-up
Timer (PWRT), Oscillator Start-up
Timer (OST), Brown-out Reset (BOR),
and Parity Error Reset (PER)
POWER-ON RESET (POR)
POWER-UP TIMER (PWRT)
Internal
Internal
Internal
Reset
Reset
Reset
BROWN-OUT SITUATIONS
V
V
V
DD
DD
DD
DD
to rise to an acceptable level.
DD
. This will
Preliminary
DD
<72 ms
72 ms
The power-up time delay will vary from chip to chip due
to V
parameters for details.
9.4.3
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.
9.4.4
PIC16C64X & PIC16C66X devices have on-chip
Brown-out Reset circuitry. A configuration bit, BODEN,
can disable (if clear/programmed) or enable (if set) the
Brown-out Reset circuitry. If V
(Parameter D005 in ES section) for greater than
parameter 35 in Table 12-6, the brown-out situation will
reset the chip. A reset is not guaranteed to occur if V
falls below 4.0V for less than parameter 35. The chip
will remain in Brown-out Reset until V
BV
keep the chip in reset an additional 72 ms. If V
below BV
chip will go back into a Brown-out Reset and the
Power-up Timer will be initialized. Once V
above BV
time delay. The Power-up Timer should always be
enabled when Brown-out Reset is enabled. Figure 9-8
shows typical Brown-out situations.
DD
72 ms
72 ms
DD
. The Power-up Timer will now be invoked and will
, temperature, and process variations. See DC
OSCILLATOR START-UP TIMER (OST)
BROWN-OUT RESET (BOR)
DD
DD
, the Power-up Timer will execute a 72 ms
while the Power-up Timer is running, the
1996 Microchip Technology Inc.
BV
BV
BV
BV
BV
BV
DD
DD
DD
DD
DD
DD
DD
Max.
Min.
Max.
Min.
Max.
Min.
falls below 4.0V
DD
rises above
DD
DD
drops
rises
DD