PIC16F1939-I/PT Microchip Technology Inc., PIC16F1939-I/PT Datasheet - Page 327

• Manufacturer Part Number: PIC16F1939-I/PT
• Description: 44 TQFP 10x10x1mm TRAY, 28KB Flash, 1KB RAM, 256B EEPROM, LCD, 1.8-5.5V
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F1939-I/PT

• A/d Inputs: 14-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 8 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin TQFP
• Programmable Memory: 28K Bytes
• Ram Size: 1K Bytes
• Speed: 32 MHz
• Temperature Range: –40 to 125 °C
• Timers: 4-8-bit, 1-16-bit
• Voltage, Range: 1.8-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

26.0
The Liquid Crystal Display (LCD) driver module
generates the timing control to drive a static or
multiplexed LCD panel. In the PIC16F193X/LF193X
device, the module drives the panels of up to four
commons and up to 24 segments. The LCD module
also provides control of the LCD pixel data.
The LCD driver module supports:
• Direct driving of LCD panel
• Three LCD clock sources with selectable prescaler
• Up to four common pins:
FIGURE 26-1:
 2009 Microchip Technology Inc.
- Static (1 common)
- 1/2 multiplex (2 commons)
- 1/3 multiplex (3 commons)
- 1/4 multiplex (4 commons)
Note 1:
LIQUID CRYSTAL DISPLAY
(LCD) DRIVER MODULE
2:
3:
These are not directly connected to the I/O pads, but may be tri-stated, depending on the configuration of
the LCD module.
SEG<23:0> on PIC16F1934/1937/1939, SEG<15:0> on PIC16F1933/1936/1938/
PIC16LF1933/1936/1938.
COM3 and SEG15 share the same physical pin on the PIC16F1933/1936/1938/PIC16LF1933/1936/1938,
therefore SEG15 is not available when using 1/4 multiplex displays.
Data Bus
LCD DRIVER MODULE BLOCK DIAGRAM
F
T1OSC
LFINTOSC
OSC
/256
Timing Control
Clock Source
LCDDATAx
Select and
Registers
Prescaler
LCDCON
LCDSEn
LCDPS
Preliminary
COM<3:0>
MUX
• Segment pins up to:
• Static, 1/2 or 1/3 LCD Bias
(3)
PIC16F193X/LF193X
- 16 (PIC16F1933/1936/1938/
- 24 (PIC16F1934/1937/1939/
Note:
PIC16LF1933/1936/1938)
PIC16LF1934/1937/1939)
SEG<23:0>
To I/O Pads
displays.
COM3 and SEG15 share the same physical
pin on the PIC16F1933/1936/1938/
PIC16LF1933/1936/1938, therefore SEG15
is not available when using 1/4 multiplex
(1, 3)
(1)
To I/O Pads
(1)
DS41364D-page 327