RA8802/8820
Version 1.1
Character/Graphic LCD Controller
The RA, RB are used for RC-Oscillator mode.
If in X’tal/PLL mode then RA and RB should be Floating.
RB
4.4 Power Signal
Pin Name
VDD
GND
AVDD
AGND
I/O
I
I
I
I
Power supply
Power ground
Analog power supply signal.
Analog ground.
Description
I
Connect Resistance.
4.5 Misc. Signal
Pin Name
RST#
X1
X2
Y1
Y2
Iout
Vref
I/O
I
I
I
I
I
O
O
Description
Active low reset signal. (The reset pulse do not less than 100mS after
MCU stable)
Normally connected to touch panel Left pin XL.
Normally connected to touch panel Right pin XR.
Normally connected to touch panel Top pin YU.
Normally connected to touch panel Bottom pin YD.
DAC current source output used to contrast voltage control.
ADC voltage reference signal.
20-bit Address Bus connected to the address bus of external character
pattern ROM.
Note: MA0 need to be Pulled High (10K)
If do not use the external Font ROM, the MA[7:0] should tied to VDD to
reduce the power consumption.
Character pattern ROM chip select and output enable
8-bit Data Bus connected to the data bus of external character pattern
ROM.
Note: If do not use the external Font ROM, the MD[7:0] should tied to
VDD to reduce the power consumption.
Test pin must be tied to GND for normal use.
Test pin must be tied to VDD for normal use.
MA[19..0]
O
MCS#
O
MD[7..0]
I
SEL0
SEL1
I
I
RAiO
TECHNOLOGY INC.
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RAIO [ RAIO TECHNOLOGY INC. ]
