
1995 Jan 19
16
Philips Semiconductors
Preliminary specification
Stand-alone OSD
PCA8515
9.1
Command 0
Table 9
Command 0 format
Command 0 is used to select the Command Bank. Bits
BS1 and BS0 are the two flags that indicate the current
Command Bank being executed. During a master reset
these two bits are cleared (BS1 = 0, BS0 = 0). Each
command has its own associated Command Bank, this is
shown in Table 8.
9.2
Command 1
Table 10
Command 1 format
Command 1 is used to load character data into the DCR
Character Register. The data will specify either a
Character Font Code, the Test Code, the Carriage Return
Code or the Space Code. These codes are explained in
detail in Section 8.1.
9.3
Command 2
Table 11
Command 2 format
This command writes character attribute data into the DCR
Attribute Register. The actual character attribute is
dependent upon the code selected by Command 1. See
the data formats shown in Tables 2, 3 and 4.
7
6
5
4
3
2
1
0
0
1
1
1
1
0
BS1
BS0
BS1
BS0
7
6
5
4
3
2
1
0
0
0
1
C6
C5
C4
C3
C2
C1
C0
BS1
BS0
7
6
5
4
3
2
1
0
X
0
0
0
0
T4
T3
T2
T1
T0
9.3.1
C
HARACTER
F
ONT
C
ODE ATTRIBUTES
Command 2 when used in conjunction with a Character
Font Code (80H to FCH) will select 1 of 16 foreground
colours and enables/disables the Blinking function.
Table 12
Selection of foreground colour
Table 13
Selection of Blinking function
T4
T3
T2
T1
R
G
B
I
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
T0
BLINKING
0
1
OFF
ON