PIC12CE518-04I/P Microchip Technology, PIC12CE518-04I/P Datasheet - Page 478
PIC12CE518-04I/P
Manufacturer Part Number
PIC12CE518-04I/P
Description
IC MCU OTP 512X12 W/EE 8DIP
Manufacturer
Microchip Technology
Series
PIC® 12Cr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC12C508A-04SM.pdf
(113 pages)
3.PIC12C508A-04SM.pdf
(4 pages)
4.PIC12CE518-04SM.pdf
(16 pages)
Specifications of PIC12CE518-04I/P
Core Size
8-Bit
Program Memory Size
768B (512 x 12)
Oscillator Type
Internal
Core Processor
PIC
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Type
OTP
Eeprom Size
16 x 8
Ram Size
25 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DIP (0.300", 7.62mm)
Controller Family/series
PIC12
No. Of I/o's
6
Eeprom Memory Size
16Byte
Ram Memory Size
25Byte
Cpu Speed
4MHz
No. Of
RoHS Compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
DVA12XP080 - ADAPTER DEVICE FOR MPLAB-ICE
Data Converters
-
Connectivity
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- PIC16F688T-ISL PDF datasheet
- PIC12C508A-04SM PDF datasheet #2
- PIC12C508A-04SM PDF datasheet #3
- PIC12CE518-04SM PDF datasheet #4
- Current page: 478 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
25.11
DS31025A-page 25-20
LCD Voltage Generation
Among the many ways to generate LCD voltage, two methods stand out above the crowd:
• resistor ladder
• charge pump.
The resistor ladder method, shown in
ages. This method uses inexpensive resistors to create the multi-level LCD voltages. Regardless
of the number of pixels that are energized the current remains constant. The voltage at point V3
is typically tied to V
The resistance values are determined by two factors: display quality and power consumption.
Display quality is a function of the LCD drive waveforms. Since the LCD panel is a capacitive
load, the waveform is distorted due to the charging and discharging currents. This distortion can
be reduced by decreasing the value of resistance. However, this change increases the power
consumption due to the increased current now flowing through the resistors. As the LCD panel
increases in size, the resistance value must be decreased to maintain the image quality of the
display.
Sometimes the addition of parallel capacitors to the resistance can reduce the distortion caused
by charging/discharging currents. The capacitors act as charge storage to provide current as the
display waveform transitions. In general, R is 1 k
200 k .
Figure 25-10: Resistor Ladder
Figure 25-11: Resistor Ladder with Capacitors
CC
, either internally or externally.
Figure
V
V
V
V
3
2
1
0
25-10, is most commonly used for higher V
V
V
V
V
3
2
1
0
+5V
to 50 k
R
R
R
and the potentiometer is 5 k
R
R
R
C
C
C
1997 Microchip Technology Inc.
CC
volt-
to
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