參數(shù)資料
型號: PIC18F452-E/ML
廠商: Microchip Technology
文件頁數(shù): 132/134頁
文件大?。?/td> 0K
描述: IC MCU FLASH 16KX16 A/D 44QFN
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
標準包裝: 45
系列: PIC® 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,LVD,POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 1.5K x 8
電壓 - 電源 (Vcc/Vdd): 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 125°C
封裝/外殼: 44-VQFN 裸露焊盤
包裝: 管件
1997 Microchip Technology Inc.
DS30444E - page 97
PIC16C9XX
13.2
LCD Interrupts
The LCD timing generation provides an interrupt that
denes the LCD frame timing. This interrupt can be
used to coordinate the writing of the pixel data with the
start of a new frame. Writing pixel data at the frame
boundary allows a visually crisp transition of the image.
This interrupt can also be used to synchronize external
events to the LCD. For example, the interface to an
external segment driver, such as a Microchip AY0438,
can be synchronized for segment data update to the
LCD frame.
A new frame is dened to begin at the leading edge of
the COM0 common signal. The interrupt will be set
immediately after the LCD controller completes
accessing all pixel data required for a frame. This will
occur at a certain xed time before the frame boundary
as shown in Figure 13-9. The LCD controller will begin
to access data for the next frame within TFWR after the
interrupt.
FIGURE 13-9: EXAMPLE WAVEFORMS IN 1/4 MUX DRIVE
COM0
COM1
COM2
COM3
V3
V2
V1
V0
V3
V2
V1
V0
V3
V2
V1
V0
V3
V2
V1
V0
Frame
Boundary
Frame
Boundary
1 Frame
LCD
Interrupt
occurs
Controller accesses
next frame data
TFINT
TFWR
TFWR = TFRAME/(LMUX1:LMUX0 + 1)
TFINT = (TFWR /2 - (2TCY + 40 ns))
→ min.
(TFWR /2 - (1TCY + 40 ns))
→ max.
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