ra8835 Topway Display, ra8835 Datasheet - Page 77

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

RAiO TECHNOLOGY INC.
Version 1.7
Notes:
1. SEL1, SEL2 and TEST are inputs. VA0 to VA15, (
2. D0 to D7, VD0 to VD7 are Bi-direction.
3.
4. f
5. VD0 to VD7 and D0 to D7 have internal feedback circuits so that if the inputs become high-
6. Because the oscillator circuit input bias current is in the order of uA, design the printed circuit board
so as to reduce leakage currents.
Rising-edge threshold
voltage
Falling-edge threshold
voltage
Supply voltage
Register data retention
voltage
Input leakage current
Output leakage current
Operating supply current
Quiescent supply current
Oscillator frequency
External clock frequency
Oscillator feedback
resistance
Input
HIGH-level input voltage
LOW-level input voltage
Output
HIGH-level output voltage
LOW-level output voltage
Schmitt-trigger
Rising-edge threshold
voltage
Falling-edge threshold
200us. Note that pulses of more than a few seconds will cause DC voltages to be applied to the LCD
panel.
The operating supply current can be reduced by approximately 1mA by setting both CLO and the
display OFF.
impedance, the input state immediately prior to that is held. Because of the feedback circuit, input
current flow occurs when the inputs are in an intermediate state.
LP, WF, YDIS are outputs.
CS
OSC
lt
,
= 10 MHz, no load (no display memory), internal character generator, 256x 2 00 pixel display.
RD
Parameter
,
WR
, A0 and
RES
Symbol
V
V
Iopr
f
V
V
V
V
V
V
V
V
I
OSC
f
Rf
I
I
OHC
OLC
LO
CL
IHC
ILC
DD
OH
LI
Q
T+
T–
T+
T–
are Schmitt-trigger inputs. The pulse width on
See note 3.
See note 3.
V
V
V
See note 4.
See note 4.
Sleep mode,
V
Measured at crystal,
47.5% duty cycle.
See note 6.
See note 1, 2
See note 1, 2
IOH= 4.0 mA.
See note 1, 2
IOL= -2 mA.
See note 1, 2
See note 3.
See note 3.
I
I
DD
OSC1
= V
= V
= 3.5 V.
= V
DD
SS
77/86
Condition
. See note 5.
. See note 5.
CS
= V
RD
VRD
= V
DD
V
), (
DD
= 2.7 to 4.5V, V
VWR
V
0.5 V
DD
Min.
V
2.7
2.0
1.0
1.0
0.7
—
—
—
—
—
—
—
—
—
—
SS
– 0.4
DD
), (
VCE
0.75 V
0.25 V
0.75 V
0.25 V
Rating
Dot Matrix LCD Controller
Typ.
0.05
0.10
0.05
3.3
3.5
—
—
—
—
—
—
—
—
—
), YD, XD0 to XD3, XSCL,
SS
DD
DD
DD
DD
= 0V, Ta = –20 to 75℃
RES
VSS + 0.4
www.raio.com.tw
0.2 V
Max.
20.0
18.0
18.0
V
4.5
6.0
2.0
5.0
7.0
3.0
—
—
—
—
—
—
RA8835
must be at least
DD
DD
Unit
MHz
MHz
MΩ
mA
μA
μA
μA
V
V
V
V
V
V
V
V
V
V
V