PIC16C433T-I/SO Microchip Technology, PIC16C433T-I/SO Datasheet - Page 58

• Manufacturer Part Number: PIC16C433T-I/SO
• Description: IC MCU CMOS 8BIT 10MHZ 2K 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C433T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN (Local Interconnect Network)
• Peripherals: POR, WDT
• Number Of I /o: 5
• 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
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-SOIC (7.5mm Width)
• For Use With: AC164030 - MODULE SKT PROMATEII 28DIP/SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

PIC16C433
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 a Power-
on Reset. A maximum rise time for V
See Electrical Specifications for details.
When the device starts normal operation (exits the
RESET condition), device operating parameters (volt-
age, 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.
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 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
able level. A configuration bit is provided to enable/dis-
able the PWRT.
The power-up time delay will vary from chip to chip due
to V
TABLE 9-4:
TABLE 9-5:
Legend: u = unchanged, x = unknown
DS41139B-page 56
DD
POR
DD
has reached a high enough level for proper oper-
Oscillator Configuration
0
0
0
1
1
1
1
, temperature and process variation.
Power-on Reset (POR), Power-up
Timer (PWRT) and Oscillator Start-up
Timer (OST)
POWER-ON RESET (POR)
POWER-UP TIMER (PWRT)
INTRC, EXTRC
XT, HS, LP
TO
1
0
x
0
0
u
1
TIMEOUT IN VARIOUS SITUATIONS
STATUS/PCON BITS AND THEIR SIGNIFICANCE
DD
PD
. This will eliminate exter-
1
x
0
u
0
u
0
DD
to rise to an accept-
Power-on Reset
Illegal, TO is set on POR
Illegal, PD is set on POR
WDT Reset
WDT Wake-up
MCLR Reset during normal operation
MCLR Reset during SLEEP or interrupt Wake-up from SLEEP
DD
72 ms + 1024T
is specified.
PWRTE = 0
72 ms
Preliminary
OSC
Power-up
9.4.3
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 timeout is invoked only for XT, LP and HS
modes and only on Power-on Reset or wake-up from
SLEEP.
9.4.4
On power-up, the timeout Sequence is as follows: first,
PWRT timeout is invoked after the POR time delay has
expired; then, OST is activated. The total timeout will
vary, based on oscillator configuration and the status of
the PWRT. For example, in RC mode with the PWRT
disabled, there will be no timeout at all. Figure 9-7,
Figure 9-8, and Figure 9-9 depict timeout sequences
on power-up.
Since the timeouts occur from the POR pulse, if MCLR
is kept low long enough, the timeouts will expire. Then
bringing MCLR high will begin execution immediately
(Figure 9-9). This is useful for testing purposes, or to
synchronize more than one PIC16C433 device operat-
ing in parallel.
9.4.5
The Power Control/Status Register, PCON (address
8Eh), has one bit.
Bit1 is POR (Power-on Reset). It is cleared on a Power-
on Reset and is unaffected otherwise. The user sets
this bit following a Power-on Reset. On subsequent
RESETS, if POR is ‘0’, it will indicate that a Power-on
Reset must have occurred.
PWRTE = 1
1024T
OSCILLATOR START-UP TIMER (OST)
TIMEOUT SEQUENCE
POWER CONTROL/STATUS REGISTER
(PCON)
—
OSC
 2002 Microchip Technology Inc.
Wake-up from SLEEP
1024T
—
OSC