CDB4954A/55A
J34
J3
J13
J15
J17
J20
J21
J22
J23
J24
J25
J27
J29
J31
S1
S2
GND Jumper for Dig Video
Input
High/Low Impedance Select
Jumpered
Open
High
Low
Gnd Connected
No Gnd Connect
High Impedance
Low Impedance
NOTE: All Jumpers must be in
the same position, namely
High or Low. Also, only
change impedance loading
with the power off.
DIP Switch for Stand Alone
Mode
Reset Switch
(See
-
(See
Resets the
CDB4954A/55A
Table 2. CBD4954 Jumper/Switch Settings (Continued)
Switch
8
7
Purpose
Clipping Input Signals
Pedestal Offset
Position
ON
OFF
ON
OFF
Function Selected
Clipping On
Clipping Off (CS4954 Con Reg 6, bit 6)
Pedestal Offset = 7.5 IRE
Pedestal Offset = 0 IRE (CS4954 Con Reg 1, bit 1)
PAL-B Mode
NTSC-M Mode
-
Display Color Bars (70% Amp, 70% Sat)
Display Luma Bars (70% Amp, 70% Sat)
Display a Luma Step
Display an Aqua Screen
Display a Luma Ramp (1 bit/2 pixels)
Display a Luma Ramp (1 bit/ pixel)
Display a Luma Ramp (2 bit/ pixel)
Display a Luma Ramp (4 bit/ pixel)
Select Parallel Video Input as External Source
Select Serial Video Input as External Source
Display Video from Flash Block 1 (Cirrus Logo - NTSC)
Display Video from Flash Block 2 (Cirrus Logo - PAL)
Display Video from Flash Block 3
Select the D656 Bus Header(J32) as external video
input source.
6
5
1-4
NTSC/PAL Format
Not Used
Operating Modes
NOTE: OFF = 0
ON = 1
ON
OFF
-
0000
1000
0100
1100
0010
1010
0110
1110
0001
1001
0101
1101
0011
1011
Table 3. DIP Switch Settings
8
CIRRUS [ CIRRUS LOGIC ]
