PIC18F65K90-I/MR Microchip Technology, PIC18F65K90-I/MR Datasheet - Page 280

• Manufacturer Part Number: PIC18F65K90-I/MR
• Description: 32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 QFN 9x9x0.9mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F65K90-I/MR

• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 64 MHz
• Number Of Timers: 8
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 16 Channel
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN Exposed Pad
• Lead Free Status / Rohs Status: Details

PIC18F87K90 FAMILY
20.2
The LCD driver module has three possible clock
sources:
• (F
• SOSC Clock/32
• INTRC/32
The first clock source is the system clock divided by
8,192 ((F
provide about 1 kHz output when the system clock is
8 MHz. The divider is not programmable. Instead, the
LCD prescaler bits, LCDPS<3:0>, are used to set the
LCD frame clock rate.
The second clock source is the SOSC oscillator/32.
This also outputs about 1 kHz when a 32.768 kHz
crystal is used with the SOSC oscillator. To use the
SOSC oscillator as a clock source, set the SOSCEN
(T1CON<3>) bit.
FIGURE 20-2:
DS39957D-page 280
OSC
Crystal Oscillator
/4)/8192
Nom F
System Clock
LF-INTOSC Oscillator
SOSC 32 kHz
OSC
LCD Clock Source Selection
(F
OSC
/4)/8192). This divider ratio is chosen to
RC
/4)
= 31.25 kHz
LCD CLOCK GENERATION
÷8192
÷32
÷32
(LCDCON<3:2>)
CS<1:0>
÷4
÷2
(LCDCON<1:0>)
LMUX<1:0>
QUAD
STAT
TRIP
DUP
The third clock source is a 31.25 kHz internal RC
oscillator/32 that 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.
These clock sources are selected through the bits
CS<1:0> (LCDCON<3:2>).
20.2.1
A 16-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 (LCDPS<3:0>) that
determines the prescaler assignment and prescale ratio.
Selectable prescale values are from 1:1 through
1:32,768, in power-of-2 increments.
4-Bit Prog Prescaler
LCD PRESCALER
(LCDPS<3:0>)
LP<3:0>
 2009-2011 Microchip Technology Inc.
(LCDCON<1:0>)
Ring Counter
LMUX<1:0>
÷1, 2, 3, 4