PIC16C72-04I/SO Microchip Technology, PIC16C72-04I/SO Datasheet - Page 63

• Manufacturer Part Number: PIC16C72-04I/SO
• Description: IC MCU OTP 2KX14 A/D PWM 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C72-04I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL309-1024 - ADAPTER 28-SOIC TO 28-DIP309-1023 - ADAPTER 28-SOIC TO 28-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

10.4
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
external RC components usually needed to create a
Power-on Reset. A maximum rise time for V
ified. See Electrical Specifications for details. For a
slow rise time, see Figure 10-6.
When the device starts normal operation (exits the
reset condition), device operating parameters (voltage,
frequency, temperature,...) must be met to ensure oper-
ation. If these conditions are not met, the device must
be held in reset until the operating conditions are met.
Brown-out Reset may be used to meet the startup con-
ditions.
FIGURE 10-6: EXTERNAL POWER-ON
Note 1: External Power-on Reset circuit is
DD
1998 Microchip Technology Inc.
rise is detected (in the range of 1.5V - 2.1V). To
2: R < 40 k is recommended to make sure
3: R1 = 100 to 1 k will limit any current
Power-On Reset (POR)
required only if V
slow. The diode D helps discharge the
capacitor quickly when V
that voltage drop across R does not violate
the device’s electrical specification.
flowing into MCLR from external capacitor
C in the event of MCLR/V
down due to Electrostatic Discharge
(ESD) or Electrical Overstress (EOS).
D
V
DD
RESET CIRCUIT (FOR SLOW
V
R
DD
C
POWER-UP)
R1
DD
power-up slope is too
DD
PIC16CXXX
MCLR
DD
PP
. This will eliminate
powers down.
pin break-
DD
is spec-
Preliminary
10.5
The Power-up Timer provides a fixed 72 ms nominal
time-out on power-up only, from the POR. The Power-
up Timer operates on an internal RC oscillator. The
chip is kept in reset as long as the PWRT is active. The
PWRT’s time delay allows V
level. A configuration bit is provided to enable/disable
the PWRT.
The power-up time delay will vary from chip to chip due
to V
parameters for details.
10.6
The Oscillator Start-up Timer (OST) provides 1024
oscillator cycle (from OSC1 input) delay after the
PWRT delay is over. This ensures that the crystal oscil-
lator 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.
10.7
A configuration bit, BODEN, can disable (if clear/pro-
grammed) or enable (if set) the Brown-out Reset cir-
cuitry. If V
greater than parameter #35, the brown-out situation will
reset the chip. A reset may not occur if V
4.0V for less than parameter #35. The chip will remain
in Brown-out Reset until V
Power-up Timer will now be invoked and will keep the
chip in RESET an additional 72 ms. If V
BV
go back into a Brown-out Reset and the Power-up
Timer will be initialized. Once V
the Power-up Timer will execute a 72 ms time delay.
The Power-up Timer should always be enabled when
Brown-out Reset is enabled.
DD
DD
while the Power-up Timer is running, the chip will
, temperature, and process variation. See DC
Power-up Timer (PWRT)
Oscillator Start-up Timer (OST)
Brown-Out Reset (BOR)
DD
PIC16C72 Series
falls below 4.0V (3.8V - 4.2V range) for
DD
DD
rises above BV
to rise to an acceptable
DD
rises above BV
DS39016A-page 63
DD
DD
drops below
falls below
DD
. The
DD
,