PIC16F1938-I/ML Microchip Technology, PIC16F1938-I/ML Datasheet - Page 179

• 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

18.0
The capacitive sensing module allows for an interaction
with an end user without a mechanical interface. In a
typical application, the capacitive sensing module is
attached to a pad on a Printed Circuit Board (PCB),
which is electrically isolated from the end user. When the
end user places their finger over the PCB pad, a
capacitive load is added, causing a frequency shift in the
capacitive sensing module. The capacitive sensing
module requires software and at least one timer
resource to determine the change in frequency. Key
features of this module include:
• Analog MUX for monitoring multiple inputs
• Capacitive sensing oscillator
• Multiple timer resources
• Software control
• Operation during Sleep
FIGURE 18-1:
© 2009 Microchip Technology Inc.
CPS10
CPS11
CPS12
CPS13
CPS14
CPS15
CPS16
CPS8
CPS9
Note 1:
CPS0
CPS1
CPS2
CPS3
CPS4
CPS5
CPS6
CPS7
CAPACITIVE SENSING
MODULE
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
2:
3:
Reference Register 18-2 for channels implemented on each device
CPSCH3 is not implemented on PIC16F1933/1936/1938/PIC16LF1933/1936/1938.
If CPSON = 0, disabling capacitive sensing, no channel is selected.
CAPACITIVE SENSING BLOCK DIAGRAM
CPSON
CPSCH<3:0>
(3)
Capacitive
Oscillator
CPSOSC
Sensing
(2)
CPSON
CPSRNG<1:0>
CPSOUT
T0CKI
CPSCLK
Preliminary
T0XCS
0
1
PIC16F193X/LF193X
F
SYNCC1OUT
OSC
T1GSEL<1:0>
SYNCC2OUT
T1CS<1:0>
F
OSC
/4
T1OSC/
F
T1CKI
T1G
OSC
/4
0
1
TMR0CS
Timer0 Module
Timer1 Module
TMR0
EN
Control Logic
Timer1 Gate
TMR1H:TMR1L
Overflow
DS41364C-page 179
TMR0IF
Set