PIC16C622A-20I/P Microchip Technology, PIC16C622A-20I/P Datasheet - Page 52

• Manufacturer Part Number: PIC16C622A-20I/P
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,DIP,18PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C622A-20I/P

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 13
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGDVA16XP180 - ADAPTER DEVICE FOR MPLAB-ICEAC164010 - MODULE SKT PROMATEII DIP/SOIC
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16C62X
9.4
9.4.1
The on-chip POR circuit holds the chip in RESET until
V
operation. To take advantage of the POR, just tie the
MCLR pin through a resistor to V
external RC components usually needed to create
Power-on Reset. A maximum rise time for V
required. See 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 (volt-
age, 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)
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 9-7:
DS30235J-page 50
DD
has reached a high enough level for proper
DD
Power-on Reset (POR), Power-up
Timer (PWRT), Oscillator Start-up
Timer (OST) and Brown-out Reset
(BOR)
declines.
POWER-ON RESET (POR)
POWER-UP TIMER (PWRT)
INTERNAL
INTERNAL
INTERNAL
RESET
RESET
RESET
V
V
V
DD
DD
DD
BROWN-OUT SITUATIONS
DD
. This will eliminate
DD
to rise to an
DD
is
<72 ms
72 ms
The Power-up Time delay will vary from chip-to-chip
and due to V
See DC 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
The PIC16C62X members 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
to V
parameter (T
tion will RESET the chip. A RESET won’t occur if V
falls below 4.0V for less than parameter (T
On any RESET (Power-on, Brown-out, Watchdog, etc.)
the chip will remain in RESET until V
BV
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 9-7
shows typical Brown-out situations.
DD
72 ms
72 ms
DD
BOR
. The Power-up Timer will now be invoked and will
drops below BV
parameter D005 (V
OSCILLATOR START-UP TIMER
(OST)
BROWN-OUT RESET (BOR)
BOR
DD
DD
, temperature and process variation.
) in Table 12-5. The brown-out situa-
, the Power-Up Timer will execute a
DD
 2003 Microchip Technology Inc.
while the Power-up Timer is
BV
BV
BV
DD
BOR
DD
DD
DD
falls below 4.0V refer
) for greater than
DD
BOR
rises above
).
DD
DD