PIC16LF1902-E/SP Microchip Technology, PIC16LF1902-E/SP Datasheet - Page 152
![3.5KB Flash, 128B RAM, LCD, 11x10b ADC, NanoWatt XLP 28 SPDIP .300in TUBE](/photos/16/11/161110/pdip28_sml.jpg)
PIC16LF1902-E/SP
Manufacturer Part Number
PIC16LF1902-E/SP
Description
3.5KB Flash, 128B RAM, LCD, 11x10b ADC, NanoWatt XLP 28 SPDIP .300in TUBE
Manufacturer
Microchip Technology
Series
PIC® XLP™ 16Fr
Datasheet
1.PIC16LF1902-EMV.pdf
(240 pages)
Specifications of PIC16LF1902-E/SP
Processor Series
PIC16LF190x
Core
PIC
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
2 KB
Data Ram Size
128 B
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
25
Number Of Timers
2
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Package / Case
PDIP-28
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
-
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
25
Eeprom Size
-
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Lead Free Status / Rohs Status
Details
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- Download datasheet (3Mb)
PIC16LF1902/3
18.2
The LCD module has 3 possible clock sources:
• F
• T1OSC
• LFINTOSC
The first clock source is the system clock divided by
256 (F
about 1 kHz output when the system clock is 8 MHz.
The divider is not programmable. Instead, the LCD
prescaler bits LP<3:0> of the LCDPS register are used
to set the LCD frame clock rate.
The second clock source is the T1OSC. This also gives
about 1 kHz when a 32.768 kHz crystal is used with the
Timer1 oscillator. To use the Timer1 oscillator as a
clock source, the T1OSCEN bit of the T1CON register
should be set.
The third clock source is the 31 kHz LFINTOSC, which
provides approximately 1 kHz output.
The second and third clock sources may be used to
continue running the LCD while the processor is in
Sleep.
FIGURE 18-2:
DS41455B-page 152
OSC
Nominal = 31 kHz
T1OSC 32 kHz
F
OSC
Crystal Osc.
OSC
/256
LFINTOSC
LCD Clock Source Selection
/256). This divider ratio is chosen to provide
÷256
LCD CLOCK GENERATION
CS<1:0>
÷2
÷4
LMUX<1:0>
Preliminary
Static
1/2
1/3,
1/4
4-bit Prog
Using bits CS<1:0> of the LCDCON register can select
any of these clock sources.
18.2.1
A 4-bit counter is available as a prescaler for the LCD
clock. The prescaler is not directly readable or writable;
its value is set by the LP<3:0> bits of the LCDPS register,
which determine the prescaler assignment and prescale
ratio.
The prescale values are selectable from 1:1 through
1:16.
Prescaler
LP<3:0>
Power Control
LCD PRESCALER
To Ladder
Counter
÷ 32
2011 Microchip Technology Inc.
Segment
Clock
Ring Counter
÷1, 2, 3, 4
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