Register Configuration; Register Descriptions; Index Register (Ir) - Renesas F-ZTAT H8 Series Hardware Manual

8-bit single-chip microcomputer

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13. Dot Matrix LCD Controller (H8/3857 Group)

Register Configuration

The LCD controller has one index register and ten control registers, all of which are accessed via

an I/O port interface. Except for the display data register (LR4), these registers cannot be read.

The LCD controller register configuration is shown in table 13.2.

Table 13.2 Register Configuration

Index register

Control register 1

Control register 2

Address register

Frame frequency setting register

Display data register

Display start line register

Blink register

Blink start line register

Blink end line register

Contrast control register

Initial value

IR is an 8-bit write-only register that selects one of the LCD controller's ten control registers. IR is

selected when RS is 0.

Upon reset, IR is initialized to H'00.

Bits 7 to 4—Reserved Bits: Bits 7 to 4 are reserved; they should always be cleared to 0.

Rev.3.00 Jul. 19, 2007 page 330 of 532

REJ09B0397-0300

Index Register