- 您现在的位置：买卖IC网 > PDF目录378432 > C505L (SIEMENS AG) Microcontrollers(8位微控制器) PDF资料下载
参数资料
| 型号： | C505L |
| 厂商： | SIEMENS AG |
| 英文描述： | Microcontrollers(8位微控制器) |
| 中文描述： | 微控制器（8位微控制器） |
| 文件页数： | 11/25页 |
| 文件大小： | 113K |
| 代理商： | C505L |
LCD Control
Using the C505L
11 of 25
AP0829 05.99
segment is active when the voltage difference of 3U is present on the LCD pins. As Figure
7 shows, the voltage difference alternates between +3U and –3U on the active segments.
This keeps the liquid crystal molecules from becoming permanently aligned in one
direction.
As indicated by Figure 7, the activated segments only receive the full 3U voltage difference
during 2 of the eight 1/f
LCD
periods that make up an LCD frame. Since the segments are
only active for 2/8 of the LCD frame, this control scheme is referred to as the driving
method.
Since each column controls 4 segments, 2 to the power of 4 = 16 different voltage
sequences are required on each of the 32 column pins in order to fully control the 128
segments in an LCD. The LCD controller of the C505L has the ability to do this without
CPU intervention.
4
The LCD controller of the C505L makes it possible to ignore all of the details of LCD
structure and control presented in the two previous sections. Figure 8 shows a block
diagram of the LCD controller of the C505L.
LCD Controller of the C505L
Figure 8:
Block Diagram of LCD Controller
15-bit Reload Reg.: LCR
15-bit Down Counter
Current
Scaling
Network
D/A
Converter
R
R
R
8-bit (V
3
): DAC0
128
Segment
LCD
Controller
16 x 8-bit Segment Regs.: DIGn
Underflow
V
3
V
2
V
1
f
osc
f
RTC
CSEL
SLT
f
LCD
LCEN
4 Row Lines
32 Column Lines
相关PDF资料 |
PDF描述 |
|---|---|
| C508 | 8-Bit CMOS Microcontroller |
| C508 | Previous Vectron Model Numbers |
| C509-L | 8-Bit CMOS Microcontroller |
| C509-L | 8-Bit CMOS Microcontroller |
| C513A-2RM | 8-Bit CMOS Microcontroller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| C505-L | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit Single-Chip Microcontroller |
| C505L_1 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| C505L4EMCCFXQMA1 | 功能描述:IC MCU 32BIT 80MQFP 制造商:infineon technologies 系列:* 零件状态:最後搶購 标准包装:1 |
| C505L4EMCCFXUMA1 | 功能描述:IC MCU 32BIT 80MQFP 制造商:infineon technologies 系列:* 零件状态:最後搶購 标准包装:1 |
| C505-LM | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
发布紧急采购，3分钟左右您将得到回复。