1
4
P
P
L
P
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11
‘write data’ to DDRAM
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
1
0
0
Ack
1
writes ‘H’
1
0
0
0
12 to 15
|
|
|
|
16
‘write data’ to DDRAM
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
1
0
1
(optional I
2
C-bus stop) I
2
C-bus start + slave address
for write (as step 8)
control byte
Co
RS
0
0
1
0
0
0
return home
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
0
0
0
Ack
1
writes ‘S’
0
0
1
1
PHILIPS_
17
PHILIPS_
18
0
0
0
0
0
0
0
0
Ack
1
PHILIPS_
19
Ack
1
sets DDRAM address 0 in address counter (also returns shifted
display to original position; DDRAM contents unchanged); this
instruction does not update the Data Register (DR)
0
0
1
0
PHILIPS
20
21
I
2
C-bus start
slave address for read
SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/W
0
1
1
1
PHILIPS
Ack
1
during the acknowledge cycle the content of the DR is loaded
into the internal I
2
C-bus interface to be shifted out; in the
previous instruction neither a ‘set address’ nor a ‘read data’ has
been performed; therefore the content of the DR was unknown;
R/W has to be set to logic 1 while still in I
2
C-bus write mode
0
1
0
1
PHILIPS
22
control byte for read
Co
RS
0
1
0
1
0
0
0
0
0
0
0
0
0
0
Ack
1
DDRAM content will be read from following instructions
PHILIPS
STEP
INSTRUCTION
DISPLAY
OPERATION