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參數(shù)資料
| 型號(hào)： | HD66702 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Dot Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器) |
| 中文描述： | 點(diǎn)陣式液晶顯示控制器/驅(qū)動(dòng)器（點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器） |
| 文件頁(yè)數(shù)： | 32/69頁(yè) |
| 文件大?。?/td> | 352K |
| 代理商： | HD66702 |
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HD66702/HD66701
32
Instructions
Outline
Only the instruction register (IR) and the data register (DR) of the HD66701/2 can be controlled by the
MPU. Before starting the internal operation of the HD66701/2, control information is temporarily stored
into these registers to allow interfacing with various MPUs, which operate at different speeds, or various
peripheral control devices. The internal operation of the HD66702 is determined by signals sent from the
MPU. These signals, which include register selection (RS), read/write (R/
W
), and the data bus (DB0 to
DB7), make up the HD66701/2 instructions (Table 7). There are four categories of instructions that:
Designate HD66701/2 functions, such as display format, data length, etc.
Set internal RAM addresses
Perform data transfer with internal RAM
Perform miscellaneous functions
Normally, instructions that perform data transfer with internal RAM are used the most. However, auto-
incrementation by 1 (or auto-decrementation by 1) of internal HD66701/2 RAM addresses after each data
write can lighten the program load of the MPU. Since the display shift instruction (Table 12) can perform
concurrently with display data write, the user can minimize system development time with maximum
programming efficiency.
When an instruction is being executed for internal operation, no instruction other than the busy flag/address
read instruction can be executed.
Because the busy flag is set to 1 while an instruction is being executed, check it to make sure it is 0 before
sending another instruction from the MPU.
Note:
Be sure the HD66701/2 is not in the busy state (BF = 0) before sending an instruction from the
MPU to the HD66701/2. If an instruction is sent without checking the busy flag, the time between
the first instruction and next instruction will take much longer than the instruction time itself. Refer
to Table 7 for the list of each instruction execution time.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD66702R | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function |
| HD66727A04TA0L | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function |
| HD66720 | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function |
| HD66727A03TA0L | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function |
| HD66705U | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver(圖形LCD控制器/驅(qū)動(dòng)器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66702R | 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 |
| HD66702RA00F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66702RA00FL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66702RA01F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66702RA02F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM-LCD CONTROLLER |
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