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參數(shù)資料
| 型號(hào)： | EM73461 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | Single Chip CMOS 4-Bit Micro-Controller for LCD Product(用于LCD顯示的工作電壓1.2V-1.8V和2.4V-3.6V的單片4位微控制器) |
| 中文描述： | 單芯片的CMOS 4位微控制器的LCD產(chǎn)品（用于液晶顯示的工作電壓為1.2V - 1.8V的和為2.4V至3.6V的單片4位微控制器） |
| 文件頁數(shù)： | 19/34頁 |
| 文件大?。?/td> | 197K |
| 代理商： | EM73461 |
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* This specification are subject to be changed without notice.
EM73461
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
7.1.1998
LCD DRIVER
EM73461 can directly drive the liquid crystal display (LCD) and has 32 segment, 4 common output pins (1/
2 bias, 1/3 bias). There are total 32x4 dots can be display. The V1, V2, V3, VA, VB, VDD and VSS pins are
the LCD bias generator.
CONTROL OF LCD DRIVER
The LCD driver control command register is P27. When LDC is 0, the LCD is disabled, the COM and SEG
pins are VSS. When LDC is 1, the LCD driver enables.
When the CPU is reseted or during the STOP operation mode, the LCD driver is disabled.
Port27
3 2 1 0
Initial value : 0000
LDC
DUTY
LDC
LCD display control
0
LCD display disable
1
LCD display enable
DUTY
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 *
Driving method select
1/4 duty (1/3 bias)
1/4 duty (1/2 bias)
1/3 duty (1/3 bias)
1/3 duty (1/2 bias)
1/2 duty (1/2 bias)
Static
Reserved
The LCD display data is stored in the display data area of the data memory (RAM).
The display data area begins with address 20H during reset. The LCD display data area ia as below :
Interrupt controller:
IL0-IL5
: Interrupt latch . Hold all interrupt requests from all interrupt sources. ILr can not be
set by program, but can be reset by program or system reset, so IL only can decide
which interrupt source can be accepted.
MASK0-MASK3
EI
: Except INT0 ,MASK register can promit or inhibit all interrupt sources.
: Enable interrupt Flip-Flop can promit or inhibit all interrupt sources, when inter-
rupt happened, EI is cleared to "0" automatically, after RTI instruction happened,
EI will be set to "1" again .
Priority checker: Check interrupt priority when multiple interrupts happened.
INTERRUPT FUNCTION
The procedure of interrupt operation:
1. Push PC and all flags to stack.
2. Set interrupt entry address into PC.
3. Set SF= 1.
4. Clear EI to inhibit other interrupts happened.
5. Clear the IL for which interrupt source has already be accepted.
6. To excute interrupt subrountine from the interrupt entry address.
7. CPU accept RTI, restore PC and flags from stack . Set EI to accept other interrupt requests.
PROGRAM EXAMPLE: To enable interrupt of "INT0, TRGA"
LDIA #1100B;
EXAE; set mask register "1100B"
EICIL 111111B ; enable interrupt F.F.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EM73469A | 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73469 | Single Chip CMOS 4-Bit Micro-Controller for LCD Product(用于LCD顯示的工作電壓1.2V-1.8V的單片4位微控制器) |
| EM73470 | 4-Bit Micro-Controller for Telecom Product(用于數(shù)字應(yīng)答控制器的4位微控制器) |
| EM73475 | Highly-Integrated Digital Answering Machine Controller(基于4位控制器的高集成數(shù)字電話應(yīng)答控制器) |
| EM73480 | Single Chip CMOS 4-Bit Micro-Controller for LCD Product(用于LCD顯示的工作電壓2.7V-3.3V的單片4位微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM73461A | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73461B | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73469A | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73866 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73880 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
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