PIC16C774-I/L Microchip Technology, PIC16C774-I/L Datasheet - Page 132
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PIC16C774-I/L
Manufacturer Part Number
PIC16C774-I/L
Description
IC MCU OTP 4KX14 A/D PWM 44PLCC
Manufacturer
Microchip Technology
Series
PIC® 16Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16C773SO.pdf
(201 pages)
3.PIC16C774P.pdf
(13 pages)
4.PIC16C774P.pdf
(16 pages)
Specifications of PIC16C774-I/L
Core Size
8-Bit
Program Memory Size
7KB (4K x 14)
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Core Processor
PIC
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Number Of I /o
33
Program Memory Type
OTP
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 10x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Controller Family/series
PIC16C
No. Of I/o's
33
Ram Memory Size
256Byte
Cpu Speed
20MHz
No. Of Timers
3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164309 - MODULE SKT FOR PM3 44PLCCISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMING444-1001 - DEMO BOARD FOR PICMICRO MCUDVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
PIC16C774-04I/L
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16C774-I/L
Manufacturer:
Microchip Technology
Quantity:
10 000
PIC16C77X
12.4
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
nate external RC components usually needed to create
a Power-on Reset. A maximum rise time for V
specified. See Electrical Specifications for details. For
a slow rise time, see
Two delay timers have been provided which hold the
device in reset after a POR (dependant upon device
configuration) so that all operational parameters have
been met prior to releasing to device to resume/begin
normal operation.
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, or if necessary an external POR circuit may be
implemented to delay end of reset for as long as
needed.
FIGURE 12-6: EXTERNAL POWER-ON
DS30275A-page 132
Note 1: External Power-on Reset circuit is required
DD
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)
only if V
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
DD
R
DD
C
Figure
power-up slope is too slow. The
POWER-UP)
DD
R1
12-6.
powers down.
PIC16C77X
MCLR
DD
PP
. This will elimi-
pin break-
Advance Information
DD
is
12.5
The Power-up Timer provides a fixed 72 ms nominal
time-out on power-up type resets only. For a POR, the
PWRT is invoked when the POR pulse is generated.
For a BOR, the PWRT is invoked when the device exits
the reset condition (V
The Power-up Timer operates on an internal RC oscil-
lator. The chip is kept in reset as long as the PWRT is
active. The PWRT’s time delay is designed to allow V
to rise to an acceptable level. A configuration bit is pro-
vided to enable/disable the PWRT for the POR only. For
a BOR the PWRT is always available regardless of the
configuration bit setting.
The power-up time delay will vary from chip to chip due
to V
parameters for details.
12.6
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 a power-up type reset or a wake-up
from SLEEP.
12.7
The Brown-out Reset module is used to generate a
reset when the supply voltage falls below a specified
trip voltage. The trip voltage is configurable to any one
of four voltages provided by the BORV1:BORV0 config-
uration word bits.
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 in the electrical specifica-
tions section, the brown-out situation will reset the chip.
A reset may not occur if V
less than parameter #35. The chip will remain in Brown-
out Reset until V
Timer will be invoked at that point 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 re-initialized. Once V
BV
time delay. Even though the PWRT is always enabled
when brown-out is enabled, the PWRT configuration
word bit should be cleared (enabled) when brown-out is
enabled.
DD
DD
DD
, the Power-up Timer will again begin a 72 ms
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
falls below the specified trippoint for
DD
rises above BV
DD
DD
1999 Microchip Technology Inc.
rises above BOR trippoint).
falls below the trippoint for
DD
DD
DD
. The Power-up
drops below
rises above
DD