ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 79

• Manufacturer Part Number: ra8835a
• Description: Dot Matrix Lcd Controller
• Manufacturer: RAIO Technology Inc.

RAiO TECHNOLOGY INC.
Version 1.0
10-2 DC Characteristic
Notes:
1. CS , RD , WR , A0, SEL1, SEL2 and TEST are inputs. VA0 to VA15, ( VRD ), ( VWR ), ( VCE ), YD,
2. D0 to D7, VD0 to VD7 are Bi-direction.
3. The RES are Schmitt-trigger inputs. The pulse width on RES must be at least 10*tc. Note that
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.
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
voltage
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.
XD0 to XD3, XSCL, LP, WF, YDIS are outputs.
OSC
= 10 MHz, no load (no display memory), internal character generator, 256x 2 00 pixel display.
Parameter
Symbol
V
V
V
Iopr
f
V
V
V
V
V
I
OSC
f
Rf
I
I
OHC
LO
OLC
CL
IHC
ILC
DD
OH
LI
Q
T+
T–
VI= VDD. See note 5.
VI= VSS. See note 5.
Sleep mode, VOSC1=
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.
See note 4.
CS
79/88
)= V(
Condition
RD
)= VDD
V
DD
= 4.5 to 5.5V, V
V
0.5 V
0.5 V
0.2 V
DD
Min.
V
4.5
2.0
1.0
1.0
0.5
—
—
—
—
—
SS
– 0.4
DD
DD
DD
0.7 V
0.3 V
Rating
Dot Matrix LCD Controller
Typ.
0.05
0.10
0.05
5.0
3.5
1.0
—
—
—
—
—
—
—
SS
DD
DD
= 0V, Ta = –20 to 75 ℃
RA8835A
www.raio.com.tw
VSS + 0.4
0.2 V
0.8 V
0.5 V
Max.
20.0
18.0
18.0
V
5.5
6.0
2.0
5.0
3.0
—
8
DD
DD
DD
DD
MHz
MHz
Unit
MΩ
mA
µA
µA
µA
V
V
V
V
V
V
V
V
V