PIC16F1937-E/MV Microchip Technology, PIC16F1937-E/MV Datasheet - Page 359

• Manufacturer Part Number: PIC16F1937-E/MV
• Description: 14KB Flash, 512B RAM, 256B EEPROM, LCD, 1.8-5.5V 40 UQFN 5x5x0.5mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1937-E/MV

• Processor Series: PIC16F
• Core: PIC
• Program Memory Type: Flash
• Program Memory Size: 14 KB
• Data Ram Size: 256 B
• Interface Type: MI2C, SPI, EUSART
• Number Of Timers: 5
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: UQFN-40
• Development Tools By Supplier: MPLAB IDE Software
• Minimum Operating Temperature: - 40 C
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 36
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Lead Free Status / Rohs Status: Details

27.12 Configuring the LCD Module
The following is the sequence of steps to configure the
LCD module.
1.
2.
3.
4.
5.
6.
7.
27.13 Disabling the LCD Module
To disable the LCD module, write all ‘0’s to the
LCDCON register.
 2008-2011 Microchip Technology Inc.
Select the frame clock prescale using bits
LP<3:0> of the LCDPS register.
Configure the appropriate pins to function as
segment drivers using the LCDSEn registers.
Configure the LCD module for the following
using the LCDCON register:
Write initial values to pixel data registers,
LCDDATA0 through LCDDATA11.
Clear LCD Interrupt Flag, LCDIF bit of the PIR2
register and if desired, enable the interrupt by
setting bit LCDIE of the PIE2 register.
Configure bias voltages by setting the LCDRL,
LCDREF and the associated ANSELx
registers as needed.
Enable the LCD module by setting bit LCDEN of
the LCDCON register.
- Timing source, bits CS<1:0>
- Sleep mode, bit SLPEN
- Multiplex and Bias mode, bits LMUX<1:0>
27.14 LCD Current Consumption
When using the LCD module the current consumption
consists of the following three factors:
• Oscillator Selection
• LCD Bias Source
• Capacitance of the LCD segments
The current consumption of just the LCD module can
be considered negligible compared to these other
factors.
27.14.1
The current consumed by the clock source selected
must be considered when using the LCD module. See
the applicable Electrical Specifications Chapter for
oscillator current consumption information.
27.14.2
The LCD bias source, internal or external, can contrib-
ute significantly to the current consumption. Use the
highest possible resistor values while maintaining
contrast to minimize current.
27.14.3
The LCD segments which can be modeled as capaci-
tors which must be both charged and discharged every
frame. The size of the LCD segment and its technology
determines the segment’s capacitance.
PIC16(L)F1934/6/7
OSCILLATOR SELECTION
LCD BIAS SOURCE
CAPACITANCE OF THE LCD
SEGMENTS
DS41364E-page 359