YGV638 Datasheet, PDF (16/26 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
Output load capacitance
20pF
Output pin
20pF
YGV638
· Clock Input
No.
Items
Symbol
Min.
Typ.
XIN, DTCKIN, DGCKIN: clock frequency
1
f_CK
6
XIN, DTCKIN, DGCKIN: clock cycle time t_cCK
25
XIN, DTCKIN, DGCKIN:
2
clock high level pulse width
t_whCK
7.5
XIN, DTCKIN, DGCKIN:
3
clock low level pulse width
t_wlCK
7.5
ADCKIN: clock frequency
4
ADCKIN: clock cycle time
f_AD
20
t_cAD
35.7
5 ADCKIN: clock high level pulse width
t_whAD
14.29
6 ADCKIN: clock low level pulse width
t_wlAD
14.29
ARCKIN: clock frequency
7
ARCKIN: clock cycle time
f_AR
6
t_cAR
25
8 ARCKIN: clock high level pulse width
t_whAR
10
9 ARCKIN: clock low level pulse width
t_wlAR
10
SYCLK: clock frequency
10
SYCLK: clock cycle time
f_SY
63
t_cSY
11.90
DCLK: clock frequency
11
DCLK: clock cycle time
f_DT
6
t_cDT
25
Note 1) The maximum of the oscillation frequency between XIN-XOUT is 30 MHz.
Note 2) SYCLK, DCLK is the internal clock.
twhCK
t_cCK
twlCK
XIN
DTCKIN
DGCKIN
V_IH
0.5×VDD33
V_IH
V_IL
Max.
40
166
28
50
40
166
84
15.88
40
166
Unit Note
MHz 1
ns
ns
ns
MHz
ns
ns
ns
MHz
ns
ns
ns
MHz 2
ns 2
MHz 2
ns 2
0.5×VDD33
V_IL
4GV638A21
16