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SCE5745 Datasheet(PDF) 10 Page - OSRAM GmbH |
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SCE5745 Datasheet(HTML) 10 Page - OSRAM GmbH |
10 / 16 page SCE5740, SCE5741, SCE5742, SCE5743, SCE5744, SCE5745 2006-03-30 10 The user can select eight specific LED brightness levels (Table „Display Brightness“ (page 10)) by changing the peak current driv- ing the LEDs. The peak current is varied by varying the ON time of the row drivers. Note that data line 3 is low (logic 0). If dimming is required with finer control between 12.5% brightness and 0.0% brightness, data line 3 can be set high (logic 1). The 12.5% peak current is now the brightness reference (100%-E8) for further dimming and as shown in Table “Display Brightness“ (page 10) eight levels of dimming are provided. For example the hex code EC in Table “Display Brightness“ (page 10) will provide a brightness level 29% lower than the 12.5% brightness level. The SCE574X offers a unique Display Power Down feature which reduces I CC to less than 50 µA. When EFHEX is loaded, as shown in Table „Power Down“ (page 10), the display is set to 0% brightness. When in the Power Down mode data may still be written into the RAM. The display is reactivated by loading a new Brightness Level Control Word into the display. The Software Clear (C0 HEX), given in Table „Software Clear“ (page 10), clears the Address Register and the RAM. The display is blanked and the Character Address Register will be set to Char- acter 0. The internal counter and the Control Word Register are unaffected. The Software Clear will remain active until the next data input cycle is initiated. Load Character Address Op code D7 D6 D5 Character Address D4 D3 D2 D1 D0 Hex Operation Load 10 1 00 0 0 0 A0 Character 0 10 1 00 0 0 1 A1 Character 1 10 1 00 0 1 0 A2 Character 2 10 1 00 0 1 1 A3 Character 3 Load Column Data Op code D7 D6 D5 Column Data D4 D3 D2 D1 D0 Operation Load 00 0 C0 C1 C2 C3 C4 Row 0 00 0 C0 C1 C2 C3 C4 Row 1 00 0 C0 C1 C2 C3 C4 Row 2 00 0 C0 C1 C2 C3 C4 Row 3 00 0 C0 C1 C2 C3 C4 Row 4 00 0 C0 C1 C2 C3 C4 Row 5 00 0 C0 C1 C2 C3 C4 Row 6 Display Brightness Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 11 1 00 0 0 0 E0 100% 11 1 00 0 0 1 E1 53% 11 1 00 0 1 0 E2 40% 11 1 00 0 1 1 E3 27% 11 1 00 1 0 0 E4 20% 11 1 00 1 0 1 E5 13% 11 1 00 1 1 0 E6 6.6% 11 1 00 1 1 1 E7 0.0% Power Down Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 11 1 01 1 1 1 EF 0% brightness Software Clear Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 11 0 00 0 0 0 C0 CLEAR |
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