HD66730 Datasheet, PDF (69/131 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display

HD66730/HD66731
Entry Mode Register (R0)
The entry mode register (Figure 6) includes bits I/D, RM1, and RM0.
I/D: Increments (I/D = 1) or decrements (I/D = 0) the DDRAM address by 1 when a character code is
written into or read out from the DDRAM. When the DDRAM address is incremented by 1, the cursor or
blinking will also shift to the right. This applies to both CGRAM and SEGRAM.
RM1/0: Selects DDRAM, CGRAM, or SEGRAM for access (Table 10).
Table 11
RM1
0
1
1
RAM Selection by RM1 and RM0
RM0
0/1
0
1
Selected RAM
Display data RAM (DDRAM)
Character generator RAM (CGRAM)
Segment RAM (SEGRAM)
R/W RS DB7
DB0
0 1 0 0 0 0 0 I/D RM1 RM0
Figure 6 Entry Mode Register
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