CDB4954A Datasheet, PDF (8/20 Pages) Cirrus Logic – Evaluation Board

CDB4954A/55A
J34
GND Jumper for Dig Video
Input
J3
High/Low Impedance Select
J13
J15
J17
NOTE: All Jumpers must be in
J20
the same position, namely
J21
High or Low. Also, only
J22
change impedance loading
J23
with the power off.
J24
J25
J27
J29
J31
S1
DIP Switch for Stand Alone
Mode
S2
Reset Switch
Jumpered
Open
High
Low
(See Table 3)
-
Gnd Connected
No Gnd Connect
High Impedance
Low Impedance
(See Table 3)
Resets the
CDB4954A/55A
Table 2. CBD4954 Jumper/Switch Settings (Continued)
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
Position
ON
OFF
ON
OFF
ON
OFF
-
0000
1000
0100
1100
0010
1010
0110
1110
0001
1001
0101
1101
0011
1011
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.
Table 3. DIP Switch Settings
8