
PIC16(L)F1946/47
DS41414D-page 364
2010-2012 Microchip Technology Inc.
FIGURE 27-19:
WAVEFORMS AND INTERRUPT TIMING IN QUARTER-DUTY CYCLE DRIVE
(EXAMPLE – TYPE-B, NON-STATIC)
Frame
Boundary
Frame
Boundary
LCD
Interrupt
Occurs
Controller Accesses
Next Frame Data
TFINT
TFWR
TFWR =TFRAME/2*(LMUX<1:0> + 1) + TCY/2
TFINT =(TFWR/2 – (2 TCY + 40 ns))
minimum = 1.5(TFRAME/4) – (2 TCY + 40 ns)
(TFWR/2 – (1 TCY + 40 ns))
maximum = 1.5(TFRAME/4) – (1 TCY + 40 ns)
Frame
Boundary
V3
V2
V1
V0
V3
V2
V1
V0
V3
V2
V1
V0
V3
V2
V1
V0
COM0
COM1
COM2
COM3
2 Frames