參數(shù)資料
型號： HD66725
廠商： Hitachi,Ltd.
英文描述： Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器)
中文描述： 圖形液晶顯示控制器/鍵掃描功能（帶鍵掃描功能的圖形液晶顯示控制器/驅(qū)動器驅(qū)動程序）
文件頁數(shù)： 19/117頁
文件大?。?/td> 834K
代理商： HD66725
HD66724/HD66725
19
Block Function Description
System Interface
The HD66724/HD66725 have five types of system interfaces, and a clock-synchronized serial, a 68-system
4-bit/8-bit bus, and a 80-system 4-bit/8-bit bus. The interface mode is selected by the IM2-0 pins. The key
scan of the HD66724/HD66725 are not available for the 4-bit/8-bit bus interface. Instead, use the clock-
synchronized serial interface.
The HD66724/HD66725 have two 8-bit registers: an instruction register (IR) and a data register (DR).
The IR stores instruction codes, such as clear display, display control, and address information for the
display data RAM (DDRAM), character generator RAM (CGRAM), and segment RAM (SEGRAM).
The DR temporarily stores the data to be written to and read from the DDRAM, CGRAM, or SEGRAM.
The data written to the DR from the MPU is automatically written to the DDRAM, CGRAM, or SEGRAM
by internal operation. Since the data is read from the RAM through the DR, the first read data is invalid and
the second read data is valid. After reading, the data in DDRAM, CGRAM, or SEGRAM at the next
address is sent to the DR for the next reading from the MPU.
Execution time for instruction excluding clear display is 0 clock cycle and instructions can be written in
succession.
Table 3
Register Selection by RS and R/W Bits
R/W Bits
RS Bits
Operations
0
0
Writes an instruction to the IR
1
0
Reads key scan data (SCAN0-3)
0
1
Writes the data to the DR to DDRAM, CGRAM, or SEGRAM
1
1
Reads the data from the DDRAM, CGRAM, or SEGRAM to DR
Key Scan Registers (SCAN0 to SCAN3)
The key matrix scanner senses and holds the key states at each rising edge of key strobe signals KST0 to
KST3 that are output by the HD66724/HD66725. After passing through the key matrix, these strobe signals
are used to sample the key states on eight inputs from KIN0 to KIN7, enabling up to 32 keys to be scanned.
Key states KIN0 to KIN7 are sampled by key strobe signal KST0 and latched into register SCAN0.
Similarly, the data sampled by strobe signals KST1 to KST3 is latched into registers SCAN1 to SCAN3,
respectively. For details, see the Key Scan Control section.
General Output Ports (PORT0 to PORT 2)
The HD66724/HD66725 have three general output ports. These ports control drive current such as that for
LEDs or backlighting by using the current boosted by an external transistor.
相關(guān)PDF資料
PDF描述
HD66726 Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器)
HD66727 Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器)
HD66728 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點圖形LCD控制器)
HD66730 Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅(qū)動器)
HD66731 Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅(qū)動器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66725A03TA0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD CONTROLLER
HD66726 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66726A03TB0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC
HD66727 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66727A03 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*