Cirrus Logic Crystal SDB4954A Manual page 8

J34
J3
J13
J15
J17
J20
J21
J22
J23
J24
J25
J27
J29
J31
S1
S2
Switch Purpose
8 Clipping Input Signals
7 Pedestal Offset
6 NTSC/PAL Format
5 Not Used
1-4 Operating Modes
NOTE: OFF = 0
ON = 1
8
GND Jumper for Dig Video
Input
High/Low Impedance Select
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
Table 2. CBD4954 Jumper/Switch Settings (Continued)
Position
ON
OFF
ON
OFF
ON
OFF
-
0000
1000
0100
1100
0010
1010
0110
1110
0001
1001
0101
1101
0011
1011
Table 3. DIP Switch Settings
Jumpered
Open
High
Low
(See Table 3)
-
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.
CDB4954A/55A
Gnd Connected
No Gnd Connect
High Impedance
Low Impedance
(See Table 3)
Resets the
CDB4954A/55A
-