MAX7472/MAX7473
HDTV Anti-Aliasing Filters with Triple-Input Mux
12 ______________________________________________________________________________________
COMMAND BYTE: INDIVIDUAL BIT DEFINITIONS
C7 C6 C5 C4 C3 C2 C1 C0
DESCRIPTION
0 0 0 0 0 0 0 0 Power-down.
00000001
Wake-up; resume normal operation using the frequency/status previously
stored (unless power has been cycled).
0 0 0 0 0 0 1 0 Set clamp voltage level for IN1 to low.
0 0 0 0 0 0 1 1 Set clamp voltage level for IN1 to high.
0 0 0 0 0 1 0 0 Set clamp voltage level for IN2 to low.
0 0 0 0 0 1 0 1 Set clamp voltage level for IN2 to high.
0 0 0 0 0 1 1 0 Set clamp voltage level for IN3 to low.
0 0 0 0 0 1 1 1 Set clamp voltage level for IN3 to high.
0 0 0 0 1 0 0 0 Select component input, color-burst filter disabled.
0 0 0 0 1 0 0 1 Select composite input, color-burst filter enabled.
0 0 0 0 1 0 1 0 Select internal sync.
0 0 0 0 1 0 1 1 Select external sync.
0 0 0 0 1 1 0 0 Select positive polarity for the external sync.
0 0 0 0 1 1 0 1 Select negative polarity for the external sync.
0 0 0 0 1 1 1 0 Enable filters.
0 0 0 0 1 1 1 1 Disable filters. Enter bypass mode.
00010000
Reset status to the default status as outlined in the Control/Status register
table. This command does not affect the Frequency register and the Channel
Selection register.
00010001
Request reading the Control/Status register. The interface expects an Sr
condition to follow with address and read/write set to read so that data can be
driven onto the bus.
0 0 0 1 0 0 1 0 Load the Frequency register with the data byte following the command word.
00010011
Request reading the Frequency register. The interface expects an Sr
condition to follow with address and read/write set to read so that data can be
driven onto the bus.
0 0 0 1 0 1 0 0 Select Input A.
0 0 0 1 0 1 0 1 Select Input B.
0 0 0 1 0 1 1 0 Select Input C.
00010111
Request reading the Channel Selection register. The interface expects an Sr
condition to follow with address and read/write set to read so that data can be
driven onto the bus.
Table 3. Command Byte Definition
(11 paginas)
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