RA6963
Preliminary Version 1.3
Dot Matrix LCD Controller
6. Functions Description
6-1 Functional Definition
After power on, it is necessary to reset. The RST is kept Low between 5 clocks up (oscillation
clock).
When HALT = Low, the oscillation stops. The power supply for the LCD must be turned off, to
protect the LCD from DC bias.
The HALT function(HALT = Low) includes the RESET function(RST =Low).
The column/line counter and display register are cleared by RST . (Other registers are not cleared.)
Disable the display using the clear-display register
The status must be checked before data or commands are sent. The MSB=0 status check must be
done in particular. There is a possibility of erroneous operation due to a hard interrupt.
STA0 and STA1 must be checked at the same time. When a command is executed, data
transmission errors may occur.
The RA6963 can only handle one byte per machine cycle (16 clocks). It is impossible to send more
than two data in a machine cycle.
When using a command with operand data, it important to send the data first, and then executes the
command.
The character fonts used by the RA6963 are different from ASCII codes.
6-2 State After RESET/HALT
< Table 6-1 >
Pins
SD[7:0]
D[7:0]
MRW
MCE
HALT
Floating
Floating
Hi
RESET
Floating
Floating
Hi
Hi (Note 1)
Hi (Note 2)
Hi (Note 1)
Final data
Low
Hi (Note 1)
Hi (Note 2)
Hi (Note 1)
Final data
Low
A[15:0]
CE0 , CE1
ED, HOD
HSCP
LP
Low
Low
CDATA
FR
Hi
Hi
Hi
Hi
CH1
Low
Test Signal
Test Signal
Low
CH2
Low
DSPON
X2
Low
Hi
OSC Clock
Note 1 :In Attribute mode, Hi or Low according to state of graphic pointer
Note 2 :In Attribute mode, data to graphic pointer
RAiO TECHNOLOGY INC.
www.raio.com.tw
10/46
RAIO [ RAIO TECHNOLOGY INC. ]
