UPD17062 datasheet(261/298 Pages) RENESAS

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259

µPD17062

(2) Vertical size data (b12 and b11 of the control data)

The vertical size data determines the vertical size of each image of a character. Up to four sizes can be

specified on each row. Table 20-8 lists details of the vertical size data.

The vertical size data specified at the beginning of a row is effective throughout that row. The vertical

size data in any other control data for the same row is ignored.

Table 20-8

Vertical Size Setting

(3) Horizontal position data (b10 to b7 of the control data)

The horizontal position data specifies which of the 16 horizontal positions shown in Fig. 20-10 the display

is to begin at. Although each row has 19 horizontal display positions, the display can start only at within

16 character positions from the left side of the screen.

The beginning of the row is specified with an absolute column number (column from 0 to 15 in

Fig. 20-10). The horizontal position data consists of four bits of the control data, with b10 corresponding

to the MSB and b7 corresponding to the LSB, and therefore it takes a value from 0H to FH. Value 0H

corresponds to column 0, and value FH to column 15.

The number of character positions left blank between two characters on the same row is specified by the

horizontal position data. In other words, the position of the next character is specified by the number (in

hexadecimal) of blank character positions after the current character position.

In Fig. 20-10, for example, the horizontal position data of A and that of C are 8H and 1H, respectively. If

the control data of C is changed to 0, C is displayed in column 9 (at character position 9). If no control

data is used after A, C is displayed also in column 9.

Remark The term number of character positions used in the above description applies when the horizontal

size data is 00. If the horizontal size data is changed, the character positions are counted for the

new horizontal size data. If the horizontal size data is a double size, for example, one row has

only eight character positions.

Vertical size data

Size

Vertical width of a

Maximum number of display

b12

b11

character (interlace)

characters in the vertical direction

Standard

15H

Double

30H

Triple

45H

Quadruple

60H

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