PIN FUNCTION DESCRIPTION
Pin Name
Pin #
Type
Description
PD<7 -0>
11-16
18-19
I
Multiplexed Cb, Y, and Cr digital video input bus.
HSYN
20
I/O
In Slave Mode (MSTR pin is low) Horizontal Synch input. In Master
Mode (MSTR pin is high) Horizontal Synch output.
VSYN
21
I/O
In slave mode (MSTR pin is low) Vertical Sync input. In master mode
Vertical Sync output.
MSTR
3
I
Master Mode;
If this pin is high, the chip outputs horizontal and vertical sync signals.
Otherwise it receives both horizontal and vertical sync signals.
CPNT
27
I
Select either component or composite video output.
0: Simultaneous Composite and S-Video output.
1: Component video output either RGB or YCbCr determined by the
register CR0[5:4].
PDEN
28
1
Pedestal enable pins.
When this pin is high 7.5 IRE is added for the NTSC composite analog
output.
CVBS
35
O
Analog video output
Determined by the state of CPNT pin and CR0[5:4]
CPNT CR0[5] CR0 [4]
---
0
----
X
------
X:
---
Composite video output
---
1
-----
X
------
0:
---
Cr output in CbCr component mode
---
1
---0
0
------
X:
--- 11111 1111 1- :
:
---
1
------
1
------
1:
----
Blue color output in RGB mode
Y
31
O
Analog video output
Determined by the state of CPNT pin and CR0[5:4]
CPNT CR0[5] CR0 [4]
---
0
-----
X
-----
X:
---
S-Video Y output.
--i
1
------
X
---- -
0:
---
Cb output in CbCr component mode
---
1
---0
0
------
X:
-- 1111 1111 11- :
:
- i
1
-----
1
--- --
1:
- -
R color output in RGB mode
C
33
O
Analog video output
Determined by the state of CPNT pin and CR0[5:4]
CPNT CR0[5] CR0 [4]
---
0
------
X
------
X:
--
S-Video C output.
----
1
------
1
-----
0:
---
Cb output in CbCr component mode
--1
1
------
0
----
X:
111 111 1- :
:
--1
1
------
1
------
X:
--
Green color output in RGB mode
VREF
40
I/O
Voltage reference. It has an internal voltage reference circuit, but may
be overridden by an external voltage reference input. A 0.1 uF ceramic
capacitor is required between this pin and GND.
IREF
39
I
A resistor should be connected between this pin and GND to control the
DAC output current. The recommended value is 198 (382) ohm 1%
metal film resistor for double (single) end 75 ohm termination.
COMP
38
I
Compensation capacitor for the DAC internal reference amplifier. A 0.1
uF ceramic capacitor is required between this pin and VDDA.
BIAS
37
I/O
DAC bias voltage. A 0.1 uf ceramic capacitor must be used to de-
couple this pin to VDDA.
4-10
