PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 474

• Manufacturer Part Number: PIC16F877-20/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/P

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
25.7
DS31025A-page 25-16
Pin
COM0
Pin
COM1
Pin
COM3
Pin
SEG0
Operation During Sleep
interrupted
frame
SLEEP instruction execution
The LCD module can operate during sleep. The selection 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.
operation. To ensure that the LCD completes the frame, the SLEEP instruction should be exe-
cuted immediately after a LCD frame boundary. The LCD interrupt can be used to determine the
frame boundary. See
If a SLEEP instruction is executed and SLPEN = '0', the module will continue to display the current
contents of the LCDD 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 shutdown of the core
and other peripheral functions.
Figure 25-9:Sleep Entry/exit When SLPEN = 1 or CS1:CS0 = 00
Note:
The internal RC oscillator or external Timer1 oscillator must be used to operate the
LCD module during sleep.
25.4 “LCD Interrupts”
for the formulas to calculate the delay.
Wake-up
1997 Microchip Technology Inc.
Figure 25-9
shows this
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