HD66108T00 HITACHI [Hitachi Semiconductor], HD66108T00 Datasheet - Page 45

Manufacturer Part Number

HD66108T00

Description

(RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics)

Manufacturer

HITACHI [Hitachi Semiconductor]

Datasheet

1.HD66108T00.pdf (60 pages)

HD66108

2. Display Memory (DRAM) (Accessed with RS = 1, Register Number = (B’000)

Although display memory (Figure 28) is not a register, it can be handled as one. 8- or 6-bit data can be

selected by the control register WLS bit according to the character font in use. If 6-bit data is selected,

D7 and D6 bits are invalid.

3. X Address Register (XAR) (Accessed with RS = 1, Register Number = (B’001)

This register (Figure 29) contains 3 invalid bits (D7 to D5) and 5 valid bits (D4 to D0). It sets X addresses

and confirms X addresses after writing or reading to or from the display memory.

4. Y Address Register (YAR) (Accessed with RS = 1, Register Number = (B’010)

This register (Figure 30) contains 1 invalid bit (D7) and 7 valid bits (D6 to D0). It sets Y addresses and

confirms Y addresses after writing or reading to or from the display memory.

998

XAD: 0 to 20 (H'00 to H'14) when display data is 8 bits long and

Reading bits marked with * return 0s and writing them is invalid.

YAD: 0 to 64 (H'00 to H'40)

—

0 to 27 (H'00 to H'1B) when display data is 6 bits long. A

maximum of H'1F is programmable.

Figure 29 X Address Register

Figure 30 Y Address Register

—

Figure 28 Display Memory

8-bit data

YAD

6-bit data

XAD