PIC16C926 Microchip Technology Inc., PIC16C926 Datasheet - Page 95

• Manufacturer Part Number: PIC16C926
• Description: 64/68-pin Cmos Microcontrollers With Lcd Driver
• Manufacturer: Microchip Technology Inc.

11.4
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. Figure
11-8 shows this operation. To ensure that the LCD com-
pletes 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 Section 11.2 for the formulas to calcu-
late the delay.
FIGURE 11-8:
2001 Microchip Technology Inc.
Pin
COM0
Pin
COM1
Pin
COM3
Pin
SEG0
Operation During SLEEP
Interrupted
Frame
SLEEP Instruction Execution
SLEEP ENTRY/EXIT WHEN SLPEN = 1 OR CS1:CS0 = 00
Preliminary
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 con-
sumption of the device will be lower due to shut-down
of the core and other peripheral functions.
Note:
The internal RC oscillator or external
Timer1 oscillator must be used to operate
the LCD module during SLEEP.
PIC16C925/926
Wake-up
DS39544A-page 93
3/3V
2/3V
1/3V
0/3V
3/3V
2/3V
1/3V
0/3V
3/3V
2/3V
1/3V
0/3V
3/3V
2/3V
1/3V
0/3V