PIC17C756A-16I/L Microchip Technology, PIC17C756A-16I/L Datasheet - Page 17
![IC, 8BIT MCU, PIC17C, 33MHZ, PLCC-64](/photos/12/13/121323/c04-049_l_sml.jpg)
PIC17C756A-16I/L
Manufacturer Part Number
PIC17C756A-16I/L
Description
IC, 8BIT MCU, PIC17C, 33MHZ, PLCC-64
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC17C752-16L.pdf
(304 pages)
3.PIC17C752-16L.pdf
(6 pages)
Specifications of PIC17C756A-16I/L
Controller Family/series
PIC17
No. Of I/o's
50
Ram Memory Size
902Byte
Cpu Speed
33MHz
No. Of Timers
4
Interface
I2C, SPI, USART
Core Size
8 Bit
Program Memory Size
32KB
Core Processor
PIC
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
50
Program Memory Type
OTP
Ram Size
902 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
68-PLCC
Embedded Interface Type
I2C, SPI, USART
Rohs Compliant
Yes
Processor Series
PIC17C
Core
PIC
Data Bus Width
8 bit
Data Ram Size
902 B
Interface Type
I2C, MSSP, RS- 232, SCI, SPI, USART
Maximum Clock Frequency
33 MHz
Number Of Programmable I/os
50
Number Of Timers
8
Operating Supply Voltage
3 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164308 - MODULE SKT FOR PM3 68PLCCDVA17XL681 - DEVICE ADAPTER FOR PIC17C752DM173001 - KIT DEVELOPMENT PICDEM17AC174007 - MODULE SKT PROMATEII 68PLCCAC164024 - ADAPTER PICSTART PLUS 68PLCC
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC17C756A-16I/L
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC17C756A-16I/L
Manufacturer:
MICROCH
Quantity:
20 000
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4.0
The internal oscillator circuit is used to generate the
device clock. Four device clock periods generate an
internal instruction clock (T
There are four modes that the oscillator can operate in.
They are selected by the device configuration bits dur-
ing device programming. These modes are:
• LF
• XT
• EC
• RC
There are two timers that offer necessary delays on
power-up. One is the Oscillator Start-up Timer (OST),
intended to keep the chip in RESET until the crystal
oscillator is stable. The other is the Power-up Timer
(PWRT), which provides a fixed delay of 96 ms (nomi-
nal) on POR and BOR. The PWRT is designed to keep
the part in RESET while the power supply stabilizes.
With these two timers on-chip, most applications need
no external RESET circuitry.
SLEEP mode is designed to offer a very low current
power-down mode. The user can wake from SLEEP
through external RESET, Watchdog Timer Reset, or
through an interrupt.
Several oscillator options are made available to allow
the part to better fit the application. The RC oscillator
option saves system cost while the LF crystal option
saves power. Configuration bits are used to select var-
ious options.
4.1
4.1.1
The PIC17CXXX can be operated in four different oscil-
lator modes. The user can program two configuration
bits (FOSC1:FOSC0) to select one of these four
modes:
• LF
• XT
• EC
• RC
The main difference between the LF and XT modes is
the gain of the internal inverter of the oscillator circuit,
which allows the different frequency ranges.
For more details on the device configuration bits, see
Section 17.0.
2000 Microchip Technology Inc.
ON-CHIP OSCILLATOR
CIRCUIT
Oscillator Configurations
Low Frequency (F
Standard Crystal/Resonator Frequency
(2 MHz
External Clock Input
(Default oscillator configuration)
External Resistor/Capacitor
(F
Low Power Crystal
Crystal/Resonator
External Clock Input
Resistor/Capacitor
OSCILLATOR TYPES
OSC
4 MHz)
F
OSC
CY
33 MHz)
).
OSC
2 MHz)
4.1.2
In XT or LF modes, a crystal or ceramic resonator is con-
nected to the OSC1/CLKIN and OSC2/CLKOUT pins to
establish oscillation (Figure 4-2). The PIC17CXXX oscil-
lator design requires the use of a parallel cut crystal. Use
of a series cut crystal may give a frequency out of the
crystal manufacturers specifications.
For frequencies above 24 MHz, it is common for the
crystal to be an overtone mode crystal. Use of overtone
mode crystals require a tank circuit to attenuate the
gain at the fundamental frequency. Figure 4-3 shows
an example circuit.
4.1.3
As the device voltage increases from Vss, the oscillator
will start its oscillations. The time required for the oscil-
lator to start oscillating depends on many factors.
These include:
• Crystal/resonator frequency
• Capacitor values used (C1 and C2)
• Device V
• System temperature
• Series resistor value (and type) if used
• Oscillator mode selection of device (which selects
Figure 4-1 shows an example of a typical oscillator/
resonator start-up. The peak-to-peak voltage of the
oscillator waveform can be quite low (less than 50% of
device V
(refer to parameter #D033 and parameter #D043 in the
electrical specification section).
FIGURE 4-1:
the gain of the internal oscillator inverter)
Crystal Start-up Time
DD
DD
) when the waveform is centered at V
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
OSCILLATOR/RESONATOR
START-UP
rise time
OSCILLATOR/
RESONATOR START-UP
CHARACTERISTICS
Time
PIC17C7XX
DS30289B-page 17
DD
/2
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