HD66710 Datasheet, PDF (16/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
 Case 2: The case is shown in figure where the EXT pin is fixed high, and the HD66710 and the
40-output extension driver are used to extend the number of display characters.
When a display shift operation is performed, the DDRAM address shifts. See Figure 7.
COM1 to 8
1 2 3 4 5 6 7 8 9 10 11 12 13 14 1516 17 18 19 20
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
COM9 to 16 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33
COM17 to 24 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53
COM25 to 32 ^{60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73}
HD66710
Extension driver (1) Extension driver (2)
Display position
DDRAM address
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 00
21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 20
41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 40
61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 60
(Display shift left)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
13 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12
33 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32
53 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52
73 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72
(Display shift right)
Figure 7 4-Line by 20-Character Display Example
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