PIC16F1938-I/ML Microchip Technology, PIC16F1938-I/ML Datasheet - Page 113

• Manufacturer Part Number: PIC16F1938-I/ML
• Description: IC MCU 8BIT FLASH 28QFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1938-I/ML

• Core Size: 8-Bit
• Program Memory Size: 28KB (16K x 14)
• Oscillator Type: Internal
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Controller Family/series: PIC16F
• No. Of I/o's: 25
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 1024Byte
• Cpu Speed: 32MHz
• Package: 28QFN EP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 32 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 25
• Interface Type: I2C/SPI/USART
• On-chip Adc: 11-chx10-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.4.4
The external Resistor-Capacitor (RC) modes support
the use of an external RC circuit. This allows the
designer maximum flexibility in frequency choice while
keeping costs to a minimum when clock accuracy is not
required.
The RC circuit connects to OSC1. OSC2/CLKOUT is
available for general purpose I/O or CLKOUT.
Figure 8-5 shows the external RC mode connections.
FIGURE 8-5:
The RC oscillator frequency is a function of the supply
voltage, the resistor (R
and the operating temperature. Other factors affecting
the oscillator frequency are:
• threshold voltage variation
• component tolerances
• packaging variations in capacitance
The user also needs to take into account variation due
to tolerance of external RC components used.
© 2009 Microchip Technology Inc.
R
C
Note 1:
V
Recommended values: 10 kΩ ≤ R
EXT
EXT
SS
V
F
I/O
DD
OSC
(1)
/4 or
EXTERNAL RC MODE
Output depends upon CLKOUTEN bit of the
Configuration Word 1.
OSC1/CLKIN
OSC2/CLKOUT
EXT
EXTERNAL RC MODES
3 kΩ ≤ R
C
EXT
) and capacitor (C
PIC
> 20 pF, 2-5V
EXT
®
EXT
MCU
≤ 100 kΩ, 3-5V
≤ 100 kΩ, <3V
EXT
Internal
Clock
) values
Preliminary
8.5
The oscillator module has three independent, internal
oscillators that can be configured or selected as the
system clock source.
1.
2.
3.
The system clock speed can be selected via software
using the Internal Oscillator Frequency Select bits
IRCF<2:0> of the OSCCON register.
The system clock can be selected between external or
internal clock sources via the System Clock Selection
(SCS) bits of the OSCCON register. See Section 8.6
“Clock Switching” for more information.
8.5.1
The INTOSC mode configures the internal oscillators
as the system clock source when the device is
programmed using the oscillator selection or the
FOSC<2:0> bits in the Configuration Word Register 1
(CONFIG1).
In INTOSC mode, OSC1/CLKIN is available for general
purpose I/O. OSC2/CLKOUT is available for general
purpose I/O or CLKOUT.
PIC16F193X/LF193X
The
Oscillator) is factory calibrated and operates at
16 MHz. The frequency of the HFINTOSC can
be
OSCTUNE register (Register 8-3).
The MFINTOSC (Medium-Frequency Internal
Oscillator) is factory calibrated and operates at
500 kHz. The frequency of the MFINTOSC can
be
OSCTUNE register (Register 8-3).
The
Oscillator) is uncalibrated and operates at
31 kHz.
Internal Clock Modes
INTOSC MODE
user-adjusted
user-adjusted
HFINTOSC
LFINTOSC
(High-Frequency
(Low-Frequency
via software using the
via software using the
DS41364C-page 113
Internal
Internal