Description
1
VSS1
Ground
Ground connection.(Digital system ground)
2 3
Xtalin Xtalout
Crystal oscillator connections
Connections for the crystal element and capacitors that form the internal sync signal generating crystal oscillator.Xtalin can also be used to input an external clock signal.(2fsc or 4fsc)
Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode.Low: crystal oscillator mode, high:
4 CTRL1 input
external clock input mode.5 OSCin
LC oscilla
Features
- SPQFP64 10x10 / SQFP64.
- Text structure : 12 lines 24 characters (Up to 288 characters).
- Character format : 16 16 dots
Character display clock frequency : about 9 MHz.
- Character sizes : Four sizes each in the horizontal and vertical directions with the size set in line units.
- Number of characters supported :
LC74731W : 256 (internal)
LC74732W : 512 (internal)
Up to 8192 using an external ROM (for Japanese)
[Reference] JIS X0298 (1990) : 6877 characters
JIS leve.