ra8835 Topway Display, ra8835 Datasheet - Page 82

• Manufacturer Part Number: ra8835
• Description: Dot Matrix Lcd Controller
• Manufacturer: Topway Display

RAiO TECHNOLOGY INC.
Version 1.7
10.3-4 Display Memory Write Timing
VA0 to VA15
VD0 to VD7
VR/W
EXT￠ O
VCE
EXT Φ0
Signal
VD0 to
VA0 to
VWR
VA15
VCE
VD7
Symbol
t
t
t
t
t
t
t
t
CYW
WSC
WHC
t
t
t
DHC
AHC
ASC
AH2
DSC
t
t
CE
CA
AS
W
C
t
AS
t
Clock period
pulse width
pulse width
Write cycle time
Address hold time
from falling edge of
Address setup time
to falling edge of
Address hold time
from rising edge of
Address setup time
to falling edge of
Address hold time
from rising edge of
Write setup time to
falling edge of
Write hold time from
falling edge of
Data input setup time
to falling edge of
Data input hold time
from falling edge of
C
VCE
VCE
VCE
VCE
VCE
VWR
VWR
VCE
VCE
t
t
W
ASC
t
W SC
t
DSC
Parameter
HIGH-level
LOW-level
VCE
VCE
82/86
2t
2t
2t
2t
V
t
t
t
t
C
C
C
C
DD
Min.
C
C
C
C
100
3tC
10
– 50
– 70
– 80
– 85
0
0
– 30
– 30
– 20
– 30
t
AHC
= 4.5 to 5.5V
t
t
t
DHC
CE
W HC
Max.
—
—
—
—
—
—
—
—
—
—
—
—
—
2t
2t
t
t
2t
t
2t
V
t
C
C
C
C
DD
Min.
125
C
C
C
C
– 110
– 115
– 125
3t
– 50
10
0
0
– 30
– 40
– 20
– 30
C
= 2.7 to 4.5V
t
Dot Matrix LCD Controller
AH2
t
t
DH2
CA
Max.
—
—
—
—
—
—
—
—
—
—
—
—
—
www.raio.com.tw
Unit
Ta = –20 to 75℃
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
RA8835
CL = 100
pF
Condition