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AS1107 Datasheet(PDF) 10 Page - ams AG |
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AS1107 Datasheet(HTML) 10 Page - ams AG |
10 / 20 page www.austriamicrosystems.com Revision 2.24 10 - 20 AS1106, AS1107 Data Sheet - Deta iled Description Shutdown Register (0xXC) The Shutdown Register controls AS1106/AS1107 shutdown mode (see Shutdown Mode on page 9). Decode Enable Register (0xX9) The Decode Enable Register sets the decode mode. BCD/HEX decoding (either BCD code – characters 0:9, E, H, L, P, and -, or HEX code – characters 0:9 and A:F) is selected by bit D2 (page 13) of the Feature Register. The Decode Enable Register is used to select the decode mode or no-decode for each digit. Each bit in the Decode Enable Regis- ter corresponds to its respective display digit (i.e., bit D0 corresponds to digit 0, bit D1 corresponds to digit 1 and so on). Table 10 lists some examples of the possible settings for the Decode Enable Register bits. Note: A logic high enables decoding and a logic low bypasses the decoder altogether. When decode mode is used, the decoder looks only at the lower-nibble (bits D3:D0) of the data in the Digit-Registers, disregarding bits D6:D4. Bit D7 sets the decimal point (SEG DP) independent of the decoder and is positive logic (bit D7 = 1 turns the decimal point on). Table 10 lists the code-B font; Table 11 lists the HEX font. When no-decode mode is selected, data bits D7:D0 of the Digit-Registers correspond to the segment lines of the AS1106/AS1107. Table 12 shows the 1:1 pairing of each data bit to the appropriate segment line. Figure 13. Standard 7-Segment LED Intensity Control and Inter-Digit Blanking Table 8. Shutdown Register Format (Address (HEX) = 0xXC)) Mode HEX Code Register Data D7 D6 D5 D4 D3 D2 D1 D0 Shutdown Mode, Reset Feature Register to Default Settings 0x00 0 XXXXXX 0 Shutdown Mode, Feature Register Unchanged 0x80 1 XXXXXX 0 Normal Operation, Reset Feature Register to Default Settings 0x01 0 XXXXXX 1 Normal Operation, Feature Register Unchanged 0x81 1 XXXXXX 1 Table 9. Decode Enable Register Format (Address (HEX) = 0xX9)) Decode Mode HEX Code Register Data D7 D6 D5 D4 D3 D2 D1 D0 No decode for digits 7:0 0x00 000000 0 0 Code-B/HEX decode for digit 0. No decode for digits 7:1 0x01 000000 01 Code-B/HEX decode for digits 3:0. No decode for digits 7:4 0x0F 000011 11 Code-B/HEX decode for digits 7:0 0xFF 111111 11 Table 10. Code-B Font 7-Segment Character Register Data On Segments = 1 D7 † D6:D4 D3 D2 D1 D0 DP † A B C D E F G 0 X 00 00 11 11110 1 X 00 01 01 10000 2 X 00 10 11 01101 3 X 00 11 11 11001 4 X 01 00 01 10011 A B G F E D C DP |
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