Tv Formats And Display Modes; Description Of Display Functions; Superimposed Mode And Text Display Mode - Hitachi H8S/2199 Hardware Manual

Single-chip microcomputer

Table of Contents

TV Formats and Display Modes

Table 29.3 indicates support for different TV formats in each display mode. Operation is not

guaranteed if a frequency resulting from division by 4 or 2 from the 4fsc/2fsc input pin is not one

of those listed in table 29.3.

Table 29.3 TV Formats and Display Modes

B.G.H/PAL, I/PAL,

There are two types of OSD display: superimposed and text display.

(1) Superimposed Mode

In superimposed mode, the state of operation of a VCR, the current time, and other text and

graphics are displayed on an ordinary TV image. In doing so, there is no mixing of the background

image and the display character colors. There is an internal AFC circuit, enabling reliable text

display. In addition, a halftone function, in which the brightness and chroma saturation of the

background screen in the character display area is reduced to make characters appear to "float"

above the background, is also available. Other features include a character border function.

(2) Text Display Mode

In text display mode, characters and graphic data can be displayed in synchronous with the

internal sync signal generated by the internal Csync generator circuit in the sync separator. The

background color for display can be selected from among eight hues. There are plentiful

ornamental functions, including functions for displaying cursors and buttons; cursor and text

colors can be selected from among eight hues, making this function ideal for use in programming

VCR recording and setting modes.

Rev. 1.0, 02/00, page 824 of 1141

Text Display

Superimposed Mode