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Let me add that to the todo list, it’s not a big effort. I like the idea to have a completer list of supported characters.
The decode-mode register sets BCD code B (0-9, E, H,L, P, and -) or no-decode operation for each digit. Eachbit in the register corresponds to one digit. A logic highselects code B decoding while logic low bypasses thedecoder. Examples of the decode mode control-regis-ter format are shown in Table 4.When the code B decode mode is used, the decoderlooks only at the lower nibble of the data in the digitregisters (D3–D0), disregarding bits D4–D6. D7, whichsets the decimal point (SEG DP), is independent of thedecoder and is positive logic (D7 = 1 turns the decimalpoint on). Table 5 lists the code B font.When no-decode is selected, data bits D7–D0 corre-spond to the segment lines of the MAX7219/MAX7221.Table 6 shows the one-to-one pairing of each data bitto the appropriate segment line.