HD64645 datasheet(8/50 Pages) HITACHI

8 / 50 page

HD64645/64646

Table 3

Functions, Application, and Configuration

Classification

Item

Description

Functions

Screen format

• Programmable horizontal scanning cycle by the character

clock period

• Programmable multiplexing duty ratio from static up to

1/512

• Programmable number of vertical displayed characters

• Programmable number of rasters per character row

(number of vertical dots within a character row + space

between character rows)

Cursor control

• Programmable cursor display position, corresponding to

RAM address

• Programmable cursor height by setting display start/end

rasters

• Programmable blink rate, 1/32 or 1/64 frame rate

Memory rewriting

• Time for rewriting memory set either by specifying number

of horizontal total characters or by cycle steal utilizing

MCLK

Memory addressing

• 16-bit memory address output, up to 64 kbytes × 2

memory accessible

• DRAM refresh address output

Paging and scrolling

• Paging by updating start address

• Horizontal scrolling by the character, by setting horizontal

virtual screen width

• Vertical smooth scrolling by updating display start raster

Character attributes

• Reverse video, blinking, nondisplay (white or black),

display ON/OFF

Application

CRTC compatible

• Facilitates system replacement of CRT display with LCD

OR function

• Enables superimposing display of character screen and

graphic screen

Configuration

LCTC configuration

• Single 5 V power supply

• I/O TTL compatible except RES, MODE, SK0, SK1

• Bus connectable with 80 family

• CMOS process

• Internal logic fully static

• 80-pin flat plastic package

HD64645 Datasheet(PDF) 8 Page - Hitachi Semiconductor

HD64645 Datasheet(HTML) 8 Page - Hitachi Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Datasheet Download

Link URL