AD9396 Analog Devices, AD9396 Datasheet - Page 32

• Manufacturer Part Number: AD9396
• Description: Analog/DVI Dual-Display Interface
• Manufacturer: Analog Devices

AD9396
0x15—Bit[5] VSYNC0 Detection Bit
Indicates if VSYNC0 is active. This bit is used to indicate when
activity is detected on the VSYNC0 input pin. If VSYNC is held
high or low, activity is not detected. The sync processing block
diagram shows where this function is implemented. 0 =
VSYNC0 not active. 1 = VSYNC0 is active.
0x15—Bit[4] VSYNC1 Detection Bit
Indicates if VSYNC1 is active. This bit is used to indicate when
activity is detected on the VSYNC1 input pin. If VSYNC is held
high or low, activity is not detected. The sync processing block
diagram shows where this function is implemented. 0 =
VSYNC1 not active. 1 = VSYNC1 is active.
0x15—Bit[3] SOG0 Detection Bit
Indicates if SOG0 is active. This bit is used to indicate when
activity is detected on the SOG0 input pin. If SOG is held high
or low, activity is not detected. The sync processing block
diagram shows where this function is implemented. 0 = SOG0
not active. 1 = SOG0 is active.
0x15—Bit[2] SOG1 Detection Bit
Indicates if SOG1 is active. This bit is used to indicate when
activity is detected on the SOG1 input pin. If SOG is held high
or low, activity is not detected. The sync processing block
diagram shows where this function is implemented. 0 = SOG1
not active. 1 = SOG1 is active.
0x15—Bit[1] Coast Detection Bit
This bit detects activity on the EXTCLK/EXTCOAST pin. It
indicates that one of the two signals is active, but it doesn’t
indicate if it is EXTCLK or COAST. A dc signal is not detected.
0 = no activity detected. 1 = activity detected.
POLARITY STATUS
0x16—Bit[7] HSYNC 0 Polarity
Indicates the polarity of the HSYNC0 input. 0 = HSYNC
polarity negative. 1 = HSYNC polarity positive.
0x16—Bit[6] HSYNC 1 Polarity
Indicates the polarity of the HSYNC1 input. 0 = HSYNC
polarity negative. 1 = HSYNC polarity positive.
0x16—Bit[5] VSYNC 0 Polarity
Indicates the polarity of the VSYNC0 input. 0 = VSYNC
polarity negative. 1 = VSYNC polarity positive.
0x16—Bit[4] VSYNC1 Polarity
Indicates the polarity of the VSYNC1 input. 0 = VSYNC
polarity negative. 1 = VSYNC polarity positive.
0x16—Bit[3] Coast Polarity
Indicates the polarity of the external coast signal. 0 = coast
polarity negative. 1 = coast polarity positive.
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0x16—Bit[2] Pseudo Sync Detected
0x16—Bit[1] Sync Filter Locked
Indicates whether sync filter is locked to periodic sync signals.
0 = sync filter locked to periodic sync signal. 1 = sync filter not
locked.
0x16—Bit[0] Bad Sync Detect
0x17—Bits[3:0] HSYNCs per VSYNC MSBs
The 4 MSBs of the 12-bit counter that reports the number of
HSYNCs/VSYNC on the active input. This is useful in
determining the mode and aids in setting the PLL divide ratio.
0x18—Bits[7:0] HSYNCs per VSYNC LSBs
The 8 LSBs of the 12-bit counter that reports the number of
HSYNCs/VSYNC on the active input.
0x19—Bits[7:0] Clamp Placement
Number of pixel clocks after the trailing edge of HSYNC to
begin clamp. The power-up default is 8.
0x1A—Bits[7:0] Clamp Duration
Number of pixel clocks to clamp. The power-up default is 0x14.
0x1B—Bits[7] Red Clamp Select
This bit selects whether the red channel is clamped to ground or
midscale. Ground clamping is used for red in RGB applications
and midscale clamping is used in YPrPb (YUV) applications.
0 = channel clamped to ground during clamping period. 1 =
channel clamped to midscale during clamping period. The
power-up default is 0.
0x1B—Bit[6] Green Clamp Select
This bit selects whether the green channel is clamped to ground
or midscale. Ground clamping is normally used for green in
RGB applications and YPrPb (YUV) applications. 0 = channel
clamped to ground during clamping period. 1 = channel
clamped to midscale during clamping period. The power-up
default is 0.
0x1B—Bit[5] Blue Clamp Select
This bit selects whether the blue channel is clamped to ground
or midscale. Ground clamping is used for blue in RGB
applications and midscale clamping is used in YPrPb (YUV)
applications. 0 = channel clamped to ground during clamping
period. 1 = channel clamped to midscale during clamping
period. The power-up default is 0.
0x1B—Bit[4] Clamp During Coast
This bit permits clamping to be disabled during coast because
video signals are generally not at a known back porch or
midscale position during coast. 0 = clamping during coast is
disabled. Clamping during coast is enabled. The power-up
default is 0.