- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370471 > HD66725 (Hitachi,Ltd.) 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) PDF資料下載
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)： | 62/117頁 |
| 文件大小： | 834K |
| 代理商： | HD66725 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁當(dāng)前第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁
HD66724/HD66725
62
Key Scan Interrupt (Wake-Up Function)
If the interrupt enable bit (IRE) is set to 1, the HD66724/HD66725 send an interrupt signal to the MPU on
detecting that a key has been pressed in the key scan circuit by setting the IRQ* output pin to a low level.
An interrupt signal can be generated by pressing any key in a 32-key matrix. The interrupt level continues
to be output during the key scan cycle during which the key is being pressed.
Normal key scanning is performed and interrupts can occur in the HD66724/HD66725 sleep mode (SLP =
1). Accordingly, power consumption can be minimized in the sleep mode, by triggering the MPU to read
key states via the interrupt which is generated only when the HD66724/HD66725 detect a key input. For
details, refer to the Sleep Mode section.
On the other hand, normal key scanning and the internal operating clock stop in the standby mode (STB =
1). During this period, the KST0 output is kept low, so the HD66724/HD66725 can always monitor eight
key inputs (KIN0-KIN7) connected to KST0 when RS = GND. Therefore, if any of the eight keys is
pressed, an interrupt occurs. When RS = Vcc, all outputs KST0 to KST3 are kept low, so the
HD66724/HD66725 can always monitor 32 key inputs. If any of 32 keys is pressed, an interrupt occurs.
Accordingly, power consumption can further be minimized in the standby mode, where the whole system is
inactive, by triggering the MPU via the interrupt which is generated only when the HD66724/HD66725
detect a key input from the above keys. For details, refer to the Standby Mode section.
The IRQ* output pin is pulled up to the V
CC
with an internal MOS resistor of approximately 50 k
.
Additional external resistors may be required to obtain stronger pull-ups. Interrupts may occur if noise
occurs in KIN0-KIN7 input during key scanning. Interrupts must be inhibited if not needed by setting the
interrupt enable bit (IRE) to 0.
IRQ
*
Interrupt generated
HD66724
HD66725
IRQ
*
V
CC
MPU
Figure 30 Interrupt Generation
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)。