PIC18LF8490-I/PT Microchip Technology, PIC18LF8490-I/PT Datasheet - Page 279

• Manufacturer Part Number: PIC18LF8490-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,80PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF8490-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
• Number Of I /o: 66
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SPI, I2C, EUSART, AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 66
• Number Of Timers: 1 x 8
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM163028
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

22.10 Operation During Sleep
The LCD module can operate during Sleep. The selec-
tion is controlled by bit, SLPEN (LCDCON<6>). Setting
the SLPEN bit allows the LCD module to go to Sleep.
Clearing the SLPEN bit allows the module to continue
to operate during Sleep.
If a SLEEP instruction is executed and SLPEN = 1, the
LCD module will cease all functions and go into a very
low-current consumption mode. The module will stop
operation immediately and drive the minimum LCD
voltage on both segment and common lines.
Figure 22-16 shows this operation.
To ensure that no DC component is introduced on the
panel, the SLEEP instruction should be executed
immediately after a LCD frame boundary. The LCD
interrupt can be used to determine the frame boundary.
See Section 22.9 “LCD Interrupts” for the formulas to
calculate the delay.
FIGURE 22-16:
© 2007 Microchip Technology Inc.
COM0
COM1
COM2
SEG0
SLEEP ENTRY/EXIT WHEN SLPEN = 1 OR CS1:CS0 = 00
2 Frames
SLEEP Instruction Execution
PIC18F6390/6490/8390/8490
If a SLEEP instruction is executed and SLPEN = 0, the
module will continue to display the current contents of
the LCDDATA registers. To allow the module to
continue operation while in Sleep, the clock source
must be either the internal RC oscillator or Timer1
external oscillator. While in Sleep, the LCD data cannot
be changed. The LCD module current consumption will
not decrease in this mode, however, the overall
consumption of the device will be lower due to shut
down of the core and other peripheral functions.
If the system clock is selected and the module is
programmed to not Sleep, the module will ignore the
SLPEN bit and stop operation immediately. The
minimum LCD voltage will then be driven onto the
segments and commons.
Note:
Wake-up
The internal RC oscillator or external
Timer1 oscillator must be used to operate
the LCD module during Sleep.
DS39629C-page 277
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