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SCD5584A Datasheet(PDF) 8 Page - Infineon Technologies AG |
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SCD5584A Datasheet(HTML) 8 Page - Infineon Technologies AG |
8 / 15 page 2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCD5580/1/2/3/4 A www.infineon.com/opto • 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany www.osram-os.com • +49-941-202-7178 8 March 23, 2000-18 Table 2. Load Character Address Table 3. Load Column Data The user can activate four Control functions. These include: LED Brightness Level, Lamp Test, IC Power Down, or Display Clear. OPCODEs and five 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 2 and 3. The user can select seven specific LED brightness levels, Table 4. These brightness levels (in percentages of full bright- ness of the display) include: 100% (F0HEX), 53% (F1HEX), 40% (F2HEX), 27% (F3HEX), 20% (F4HEX), 13% (F5HEX), and 6.6% (F6HEX). The brightness levels are controlled by changing the duty factor of the row strobe pulse. The SCD558XA offers a unique Display Power Down feature which reduces ICC to less than 50 µA. When FFHEX is loaded, as shown in Table 5, the display is set to 0% brightness and the internal multiplex clock is stopped. 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. Figure 9. Row and Column Location Op code D7 D6 D5 Character Address D4 D3 D2 D1 D0 Hex Operation Load 1 0 1 0 0 0 0 0 A0 Character 0 1 0 1 0 0 0 0 1 A1 Character 1 1 0 1 0 0 0 1 0 A2 Character 2 1 0 1 0 0 0 1 1 A3 Character 3 1 0 1 0 0 1 0 0 A4 Character 4 1 0 1 0 0 1 0 1 A5 Character 5 1 0 1 0 0 1 1 0 A6 Character 6 1 0 1 0 0 1 1 1 A7 Character 7 Op code D7 D6 D5 Column Data D4 D3 D2 D1 D0 Operation Load 0 0 0 C0 C1 C2 C3 C4 Row 0 0 0 1 C0 C1 C2 C3 C4 Row 1 0 1 0 C0 C1 C2 C3 C4 Row 2 0 1 1 C0 C1 C2 C3 C4 Row 3 1 0 0 C0 C1 C2 C3 C4 Row 4 off LED on LED Row 0 Row 1 Row 2 Row 3 Row 4 0 1 2 3 4 Columns Previously “on” LED Table 4. Display Brightness Table 5. Power Down The Lamp Test is enabled by loading F8HEX, Table 6, into the serial shift register. This Control Word sets all of the LEDs to a 53% brightness level. Operation of the Lamp Test has no affect on the RAM and is cleared by loading a Brightness Control Word. Table 6. Lamp Test The Software Clear (C0HEX), given in Table 7, clears the Address Register and the RAM. The display is blanked and the Character Address Register will be set to Character 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. Table 7. Software Clear Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 1 1 1 1 0 0 0 0 F0 100% 111 100 0 1 F1 53% 111 100 1 0 F2 40% 111 100 1 1 F3 27% 111 101 0 0 F4 20% 111 101 0 1 F5 13% 1 1 1 1 0 1 1 0 F6 6.6% Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 111 111 1 1 FF 0% brightness Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 1 1 1 1 0 B B B Lamp Test (OFF) 1 1 1 1 1 0 0 0 F8 Lamp Test (ON) Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 1 1 0 0 0 0 0 0 C0 CLEAR |
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