PIC16F1937-I/P Microchip Technology, PIC16F1937-I/P Datasheet - Page 256

• Manufacturer Part Number: PIC16F1937-I/P
• Description: IC PIC MCU FLASH 512KX14 40-PDIP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1937-I/P

• Program Memory Type: FLASH
• Program Memory Size: 14KB (8K x 14)
• Package / Case: 40-DIP (0.600", 15.24mm)
• 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 ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: EUSART/MI2C/SPI
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14-ch x 10-bit
• A/d Bit Size: 10 bit
• A/d Channels Available: 14
• Height: 4.95 mm
• Length: 53.21 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Width: 14.73 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC16F193X/LF193X
21.5
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 21-4 for details).
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 21-4:
21.6
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.
21.7
The LCDDATAx registers contain bits which define the
state of each pixel. Each bit defines one unique pixel.
Register 21-6 shows the correlation of each bit in the
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.
21.8
The rate at which the COM and SEG outputs change is
called the LCD frame frequency.
DS41364A-page 254
Multiplex
Note:
Static
1/2
1/3
1/4
LCD Multiplex Types
Segment Enables
Pixel Control
LCD Frame Frequency
On a Power-on Reset, these pins are
configured as normal I/O, not LCD pins.
LMUX
<1:0>
00
01
10
11
COMMON PIN USAGE
Unused
Unused
Unused
COM3
Active
Unused
Unused
COM2
Active
Active
Unused
COM1
Active
Active
Active
Preliminary
TABLE 21-5:
TABLE 21-6:
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 (LP<3:0> + 1))
Clock source/(2 x 2 x (LP<3:0> + 1))
Clock source/(1 x 3 x (LP<3:0> + 1))
Clock source/(1 x 4 x (LP<3:0> + 1))
Static
FRAME FREQUENCY
FORMULAS
APPROXIMATE FRAME
FREQUENCY (IN Hz) USING
F
32.768 kHz OR LFINTOSC
85
64
51
43
37
32
OSC
Frame Frequency =
© 2008 Microchip Technology Inc.
@ 8 MHz, TIMER1 @
1/2
85
64
51
43
37
32
OSC
/256, T1OSC or
114
1/3
85
68
57
49
43
1/4
85
64
51
43
37
32