PIC16LC73A-04/SO Microchip Technology, PIC16LC73A-04/SO Datasheet - Page 134

• Manufacturer Part Number: PIC16LC73A-04/SO
• Description: IC MCU OTP 4KX14 A/D PWM 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16LC73A-04/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 6 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

PIC16C7X
14.4
14.4.1
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
nate external RC components usually needed to create
a Power-on Reset. A maximum rise time for V
specified. See Electrical Specifications for details.
When the device starts normal operation (exits the
reset condition), device operating parameters (voltage,
frequency, temperature, ...) 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. Brown-out Reset may be used to meet the startup
conditions.
For additional information, refer to Application Note
AN607, " Power-up Trouble Shooting ."
14.4.2
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.
FIGURE 14-9: BROWN-OUT SITUATIONS
DS30390E-page 134
DD
rise is detected (in the range of 1.5V - 2.1V). To
Power-on Reset (POR), Power-up
Timer (PWRT) and Oscillator Start-up
Timer (OST), and Brown-out Reset
(BOR)
POWER-ON RESET (POR)
POWER-UP TIMER (PWRT)
Applicable Devices
72 73 73A 74 74A 76 77
Internal
Internal
Internal
Reset
Reset
Reset
V
V
V
DD
DD
DD
DD
to rise to an acceptable
DD
. This will elimi-
DD
is
<72 ms
72 ms
The power-up time delay will vary from chip to chip due
to V
parameters for details.
14.4.3
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.
14.4.4
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.
cal brown-out situations.
72 ms
72 ms
DD
DD
while the Power-up Timer is running, the chip will
, temperature, and process variation. See DC
OSCILLATOR START-UP TIMER (OST)
BROWN-OUT RESET (BOR)
Applicable Devices
72 73 73A 74 74A 76 77
DD
falls below 4.0V (3.8V - 4.2V range) for
1997 Microchip Technology Inc.
BV
BV
BV
BV
BV
BV
DD
DD
DD
DD
DD
DD
DD
rises above BV
Figure 14-9 shows typi-
DD
Max.
Min.
Max.
Min.
Max.
Min.
rises above BV
DD
DD
drops below
falls below
DD
. The
DD
,