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SCE5785 Datasheet(PDF) 9 Page - OSRAM GmbH |
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SCE5785 Datasheet(HTML) 9 Page - OSRAM GmbH |
9 / 15 page SCE5780 2006-01-23 9 The user can activate four Control functions. These include: LED Brightness Level, IC Power Down, Prescaler, or Display Clear. OPCODEs and six bit words are used to initiate these functions. The OPCODEs and Control Words for the Character Address and Loading Column Data are shown in Tables „Load Character Address“ and „Load Column Data“. The user can select eight specific LED brightness levels, Tables „Display Brightness“. Depending on how D3 is selected either one (1) for maximum peak current or zero (0) for 12.5% of maximum peak current in the control word per Table „Display Brightness“, the user can select 16 specific LED brightness levels. These bright- ness levels (in percentages of full brightness of the display) depending on how the user selects D3 can be one (1) or zero (0) are as follows: 100% (E0 HEX or E8HEX), 53% (E1HEX or E9HEX), 40% (E2 HEX or EAHEX), 27% (E3HEX or EBHEX), 20% (E4HEX or ECHEX), 13% (E5 HEX or EDHEX), and 6.6% (E6HEX or EEHEX), 0.0% (E7HEX or EF HEX). The brightness levels are controlled by changing the duty factor of the row strobe pulse. The SCE578X offers a unique Display Power Down feature which reduces I CC to less than 150 mA total. When EFHEX is loaded (Table „Power Down“) 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. Row and Column Locations for a Character “D” Load Character Address Op code D7 D6 D5 Character Address D4 D3 D2 D1 D0 Hex Operation Load 101 000 0 0 A0 Character 0 101 000 0 1 A1 Character 1 101 000 1 0 A2 Character 2 101 000 1 1 A3 Character 3 101 001 0 0 A4 Character 4 101 001 0 1 A5 Character 5 101 001 1 0 A6 Character 6 101 001 1 1 A7 Character 7 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 1 000 0 0 E0 100% 11 1 000 0 1 E1 53% 11 1 000 1 0 E2 40% 11 1 000 1 1 E3 27% 11 1 001 0 0 E4 20% 11 1 001 0 1 E5 13% 11 1 001 1 0 E6 6.6% 11 1 001 1 1 E7 0.0% Display Brightness Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 11 1 010 0 0 E8 100% 11 1 010 0 1 E9 53% 11 1 010 1 0 EA 40% 11 1 010 1 1 EB 27% 11 1 011 0 0 EC 20% 11 1 011 0 1 ED 13% 11 1 011 1 0 EE 6.6% 11 1 011 1 1 EF 0.0% Power Down Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 11 1 011 1 1 EF 0% brightness IDXX5191 Row 2 Row 3 Row 4 Row 5 Row 6 01 2 3 4 Previously "on" LED On LED Off LED Columns Row 0 Row 1 |
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