Microchip Technology IC PIC MCU PIC16F1937-I/PT TQFP-44 MCP PIC16F1937-I/PT Data Sheet
Product codes
PIC16F1937-I/PT
PIC16(L)F1934/6/7
DS41364E-page 356
2008-2011 Microchip Technology Inc.
FIGURE 27-19:
WAVEFORMS AND INTERRUPT TIMING IN QUARTER-DUTY CYCLE DRIVE
(EXAMPLE – TYPE-B, NON-STATIC)
(EXAMPLE – TYPE-B, NON-STATIC)
Frame
Boundary
Boundary
Frame
Boundary
Boundary
LCD
Interrupt
Interrupt
Occurs
Controller Accesses
Next Frame Data
Next Frame Data
T
FINT
T
FWR
T
FWR
= T
FRAME
/2*(LMUX<1:0> + 1) + T
CY
/2
T
FINT
= (T
FWR
/2 – (2 T
CY
+ 40 ns))
minimum = 1.5(T
FRAME
/4) – (2 T
CY
+ 40 ns)
(T
FWR
/2 – (1 T
CY
+ 40 ns))
maximum = 1.5(T
FRAME
/4) – (1 T
CY
+ 40 ns)
Frame
Boundary
Boundary
V
3
V
2
V
1
V
0
V
3
V
2
V
1
V
0
V
3
V
2
V
1
V
0
V
3
V
2
V
1
V
0
COM0
COM1
COM2
COM3
2 Frames