YGV638 Datasheet, PDF (15/26 Pages) YAMAHA CORPORATION – a pattern graphic controller with an on-chip VRAM and the ample drawing performance enables high-resolution animated GUIs on WVGA display panels.

■ Electrical Characteristics
YGV638
● AC Characteristics
AC characteristic is a value under the following conditions unless otherwise noted.
■ Input signal measurement condition:
Input voltages
Input transition time (tr,tf)
Input measurement reference voltage
0V / V_DD33
1ns (Provide for the transition time between 10% and 90% of
the input voltage.)
0.5×V_DD33
Input
signal
Input
signal
V _DD33
GND
V _DD33
GND
tr
0.9×V_DD33
0.1×V_DD33
0.5×V_DD33
Measurement
reference voltage
tf
0.9×V_DD33
0.1×V_DD33
0.5×V_DD33
Measurement
reference voltage
■ Output signal measurement condition
Output measurement reference voltage 0.5×V_DD33
(In neither 3-state output pin nor input output pins, even when it
changed to high impedance, an output wave changes; therefore,
I/O cell specifies the transition to high impedance to the timing,
being as a disable state.)
Output
signal
V_DD33
GND
0.5×V_DD33
Measurement
0.5×V_DD33
Measurement
V_DD33
3-state output signal
Hi-Z
3-state output signal
GND
V_DD33
Measurement point
Hi-Z
GND
Measurement point
4GV638A21
15