PIC16C432T-I/SS Microchip Technology, PIC16C432T-I/SS Datasheet - Page 50

• Manufacturer Part Number: PIC16C432T-I/SS
• Description: IC MCU CMOS 8BIT 20MHZ 2K 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C432T-I/SS

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: LIN (Local Interconnect Network)
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 12
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: AC164029 - MODULE SKT PROMATEII 20DIP/SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

PIC16C432
9.4
9.4.1
The on-chip POR circuit holds the chip in RESET until
V
ation. 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 (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 condi-
tions 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)
timeout 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:
DS41140B-page 48
DD
has reached a high enough level for proper oper-
DD
Power-on Reset (POR), Power-up
Timer (PWRT), Oscillator Start-up
Timer (OST) and Brown-out Reset
(BOD)
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 exter-
DD
is required. See
DD
to rise to an
Preliminary
<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 timeout is invoked only for XT, LP and HS
modes and only on Power-on Reset or wake-up from
SLEEP.
9.4.4
The PIC16C432 has an on-chip Brown-out Reset cir-
cuitry. A configuration bit, BOREN, can disable (if clear/
programmed), or enable (if set) the Brown-out Reset
circuitry. If V
eter D005) for greater than parameter (T
Table 12-6, the brown-out situation will reset the chip.
A RESET won’t occur if V
than parameter (T
On any RESET (Power-on, Brown-out, Watchdog,
etc.), the chip will remain in RESET until V
above BV
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
above BV
RESET. The Power-up Timer should always be enabled
when Brown-out Reset is enabled. Figure 9-7 shows
typical Brown-out situations.
72 ms
72 ms
DD
drops below BV
DD
DD
OSCILLATOR START-UP TIMER
(OST)
BROWN-OUT RESET (BOD)
DD
. The Power-up Timer will then be invoked
, the Power-up Timer will execute a 72 ms
DD
falls below 4.0V (refer to BV
, temperature and process variation.
BOR
).
DD
2002 Microchip Technology Inc.
while the Power-up Timer is
DD
BV
BV
BV
falls below 4.0V for less
DD
DD
DD
DD
DD
BOR
DD
param-
rises
rises
) in