PIC16F1937-E/MV Microchip Technology, PIC16F1937-E/MV Datasheet - Page 342

• 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

PIC16(L)F1934/6/7
27.5
The LCD driver module can be configured into one of
four multiplex types:
• Static (only COM0 is used)
• 1/2 multiplex (COM<1:0> are used)
• 1/3 multiplex (COM<2:0> are used)
• 1/4 multiplex (COM<3:0> are used)
The LMUX<1:0> bit setting of the LCDCON register
decides which of the LCD common pins are used (see
Table 27-4
If the pin is a digital I/O, the corresponding TRIS bit
controls the data direction. If the pin is a COM drive,
then the TRIS setting of that pin is overridden.
TABLE 27-4:
27.6
The LCDSEn registers are used to select the pin
function for each segment pin. The selection allows
each pin to operate as either an LCD segment driver or
as one of the pin’s alternate functions. To configure the
pin as a segment pin, the corresponding bits in the
LCDSEn registers must be set to ‘1’.
If the pin is a digital I/O, the corresponding TRIS bit
controls the data direction. Any bit set in the LCDSEn
registers overrides any bit settings in the corresponding
TRIS register.
27.7
The LCDDATAx registers contain bits which define the
state of each pixel. Each bit defines one unique pixel.
Register 27-6
LCDDATAx registers to the respective common and
segment signals.
Any LCD pixel location not being used for display can
be used as general purpose RAM.
27.8
The rate at which the COM and SEG outputs change is
called the LCD frame frequency.
DS41364E-page 342
Multiplex
Note:
Static
1/2
1/3
1/4
LCD Multiplex Types
Segment Enables
Pixel Control
LCD Frame Frequency
for details).
On a Power-on Reset, these pins are
configured as normal I/O, not LCD pins.
LMUX
<1:0>
00
01
10
11
shows the correlation of each bit in the
COMMON PIN USAGE
Unused
Unused
Unused
COM3
Active
Unused
Unused
COM2
Active
Active
Unused
COM1
Active
Active
Active
TABLE 27-5:
TABLE 27-6:
Multiplex
Note:
LP<3:0>
Static
1/2
1/3
1/4
2
3
4
5
6
7
Clock source is F
LFINTOSC.
Clock source/(4 x 1 x (LPD Prescaler) x 32))
Clock source/(2 x 2 x (LPD Prescaler) x 32))
Clock source/(1 x 3 x (LPD Prescaler) x 32))
Clock source/(1 x 4 x (LPD Prescaler) x 32))
Static
FRAME FREQUENCY
FORMULAS
APPROXIMATE FRAME
FREQUENCY (IN Hz) USING
F
32.768 kHz OR LFINTOSC
122
 2008-2011 Microchip Technology Inc.
81
61
49
41
35
OSC
Frame Frequency =
@ 8 MHz, TIMER1 @
122
1/2
81
61
49
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35
OSC
/256, T1OSC or
162
108
1/3
81
65
54
47
122
1/4
81
61
49
41
35