CH7010A
Chrontel
CHRONTEL
CHRONTEL
CH7010A DVI / TV Output Device
1. F
EATURES
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DVI Transmitter up to 135MHz
DVI low jitter PLL
DVI hot plug detection
TV output supporting graphics resolutions up to
1024 x768 pixels
Programmable digital interface supports RGB and
YCrCb
True scale rendering engine supports underscan in all TV
output resolutions
Enhanced text sharpness and adaptive flicker removal
with up to 7 lines of filtering
Support for all NTSC and PAL formats
Provides CVBS, S-Video and SCART (RGB) outputs
TV connection detection
Programmable power management
10-bit video DAC outputs
Fully programmable through serial port
Complete Windows and DOS driver support
Low voltage interface support to graphics device
Offered in a 64-pin LQFP package
2. G
ENERAL
D
ESCRIPTION
The CH7010A is a display controller device which accepts a
digital graphics input signal, and encodes and transmits data
through a DVI (DFP can also be supported) or TV output
(analog composite, s-video or RGB). The device accepts data
over one 12-bit wide variable voltage data port which supports
five different data formats including RGB and YCrCb.
The DVI processor includes a low jitter PLL for generation of
the high frequency serialized clock, and all circuitry required
to encode, serialize and transmit data. The CH7010A comes in
versions able to drive a DVI display at a pixel rate of up to
135MHz, supporting SXGA resolution displays. No scaling of
input data is performed on the data output to the DVI device.
The TV-Out processor performs non-interlace to interlace
conversion with scaling and flicker filters, and encode the data
into any of the NTSC or PAL video standards. The scaling and
flicker filter is adaptive and programmable to enable superior
text display. Eight graphics resolutions are supported up to
1024 by 768 with full vertical and horizontal underscan
capability in all modes. A high accuracy low jitter phase
locked loop is integrated to create outstanding video quality.
Support is provided RGB bypass
mode which enables driving
a VGA CRT with the input data.
XCLK, XCLK*
Clock
Driver
DVI PLL
DVI
Encode
DVI
Serialize
2
DVI
Driver
TLC,TLC*
TDC0,TDC0*
TDC1,TDC1*
TDC2,TDC2*
VSWING
HPDET
GPIO[1:0]
AS
SPC
SPD
RESET*
C/H SYNC
ISET
2
24
3
24
2
3
2
PLL3
Serial
port
Control
D[11:0]
12
Data
Latch,
Demux
2
2
2
H,V,DE
VREF
XI/FIN,XO
P-OUT/TLDET*
3
H, V, DE
Latch
BCO
3
24
Timing
Scaling
Scan
Conv
Flicker Filt
TV
Encode
Four
10-bit
DAC’s
CVBS
(DAC3)
Y/G
(DAC1)
C/R
(DAC2)
CVBS/B
(DAC0)
24
Figure 1. Functional Block Diagram
201-0000-038
Rev 2.1, 7/12/2004
1
CHRONTEL
3. P
IN
D
ESCRIPTIONS
3.1 Package Diagram
CH7010A
64
DGND
63
D[0]
62
D[1]
61
D[2]
60
D[3]
59
D[4]
58
D[5]
57
XCLK
56
XCLK*
55
D[6]
54
D[7]
53
D[8]
52
D[9]
51
D[10]
50
D[11]
49
DVDD
DVDD
DE
VREF
H
V
DGND
GPIO[1] / TLDET*
GPIO[0]
HPDET
AS
DGND
DVDD
RESET*
SPD
SPC
AGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Chrontel
CH7010A
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
C / H SYNC
BCO/ V SYNC
P-OUT/TLDET*
DVDDV
AVDD
XO
XI / FIN
AGND
GND
CVBS / B
C/R
Y/G
CVBS
ISET
GND
VDD
AGND
AVDD
VSWING
TGND
TDC0*
TDC0
TVDD
TDC1*
TDC1
TGND
TDC2*
TDC2
Figure 2. 64-Pin LQFP
2
TVDD
TLC
TLC*
TGND
201-0000-038
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Rev 2.1, 7/12/2004
CHRONTEL
3.2 Pin Description
Table 1. Pin Description
64-Pin # Pins Type
LQFP
2
1
In
CH7010A
Symbol
DE
Description
Data Enable
This pin accepts a data enable signal which is high when active
video data is input to the device, and low all other times. The levels
are 0 to DVDDV, and the VREF signal is used as the threshold level.
This input is used by the DVI. The TV-Out function uses H and V
sync signals as reference to active video.
3
1
In
VREF
Reference Voltage Input
The VREF pin inputs a reference voltage of DVDDV / 2. The signal
is derived externally through a resistor divider and decoupling
capacitor, and will be used as a reference level for data, sync, data
enable and clock inputs.
4
1
In/Out
H
Horizontal Sync Input / Output
When the SYO bit is low, this pin accepts a horizontal sync input for
use with the input data. The amplitude will be 0 to DVDDV, and the
VREF signal is used as the threshold level.
When the SYO bit is high, the device will output a horizontal sync
pulse, 64 pixels wide. The output is driven from the DVDD. This
output is only for use with the TV-Out function.
5
1
In/Out
V
Vertical Sync Input / Output
When the SYO bit is low, this pin accepts a vertical sync input for
use with the input data. The amplitude will be 0 to DVDDV, and the
VREF signal is used as the threshold level.
When the SYO bit is high, the device will output a vertical sync
pulse one line wide. The output is driven from the DVDD supply.
This output is only for use with the TV-Out function.
7
2
In/Out
GPIO[1]
/
TLDET*
General Purpose Input - Output[1] /
DVI Detect Output
(Open drain or internal weak pull-up)
This pin provides a general purpose I/O controlled via the serial port.
When the GPIO[1] pin is configured as an output, this pin can be
used to output the DVI detect signal (pulls low when a termination
change has been detected on the HPDET input). This is an open
drain output. The output is released through serial port control.
8
2
In/Out
GPIO[0]
General Purpose Input - Output[0]
(Open drain or internal weak pull-up)
This pin provides a general purpose I/O controlled via the serial port.
This allows an external switch to be used to select NTSC or PAL at
power-up.
9
1
In
HPDET
Hot Plug Detect
(internal pull-down)
This input pin determines whether the DVI is connected to a DVI
monitor. When terminated, the monitor is required to apply a
voltage greater than 2.4 volts. Changes on the status of this pin will
be relayed to the graphics controller via the P-OUT/TLDET* or
GPIO[1]/TLDET* pin pulling low.
10
1
In
AS
Address Select
(Internal pull-up)
This pin determines the serial port address of the device
(1,1,1,0,1,AS*,AS).
201-0000-038
Rev 2.1, 7/12/2004
3
CHRONTEL
Table 1. Pin Description
(continued)
64-Pin # Pins Type
Symbol
LQFP
13
1
In
RESET*
CH7010A
Description
Reset * Input
(Internal pull-up)
When this pin is low, the device is held in the power-on reset
condition. When this pin is high, reset is controlled through the
serial port register.
14
1
In/Out
SPD
Serial Port Data Input / Output
This pin functions as the serial port data pin of the serial port
interface, and uses the DVDD supply.
15
1
In
SPC
19
1
In
VSWING
Serial Port Clock Input
This pin functions as the clock pin of the
serial port
interface, and
uses the DVDD supply.
DVI Swing Control
This pin sets the swing level of the DVI outputs. A 2.4K ohm
resistor should be connected between this pin and TGND using short
and wide traces.
22, 21
2
Out
TDC0,
TDC0*
DVI Data Channel 0 Outputs
These pins provide the DVI differential outputs for data channel 0
(blue).
25, 24
2
Out
TDC1,
TDC1*
DVI Data Channel 1 Outputs
These pins provide the DVI differential outputs for data channel 1
(green).
28, 27
2
Out
TDC2,
TDC2*
DVI Data Channel 2 Outputs
These pins provide the DVI differential outputs for data channel 2
(red).
30, 31
2
Out
TLC,
TLC*
DVI Clock Outputs
These pins provide the differential clock output for the DVI interface
corresponding to data on the TDC[0:2] outputs.
35
1
In
ISET
Current Set Resistor Input
This pin sets the DAC current. A 140 ohm resistor should be
connected between this pin and GND (DAC ground) using short and
wide traces.
36
1
Out
CVBS
Composite Video
This pin outputs a composite video signal capable of driving a 75
ohm doubly terminated load.
37
1
Out
Y/G
Luma / Green Output
This pin outputs a selectable video signal. The output is designed to
drive a 75 ohm doubly terminated load. The output can be selected
to be s-video luminance or green.
38
1
Out
C/R
Chroma / Red Output
This pin outputs a selectable video signal. The output is designed to
drive a 75 ohm doubly terminated load. The output can be selected
to be s-video chrominance or red.
39
1
Out
CVBS/B
Composite Video / Blue Output
This pin outputs a selectable video signal. The output is designed to
drive a 75 ohm doubly terminated load. The output can be selected
to be composite video or blue.
42
1
In
XI / FIN
Crystal Input / External Reference Input
A parallel resonance 14.31818MHz crystal (+ 20 ppm) should be
attached between this pin and XO. However, an external clock can
drive the XI/FIN input.
4
201-0000-038
Rev 2.1, 7/12/2004
CHRONTEL
Table 1. Pin Description
(continued)
64-Pin # Pins Type
Symbol
LQFP
43
1
In
XO
CH7010A
Description
Crystal Output
A parallel resonance 14.31818MHz crystal (+ 20 ppm) should be
attached between this pin and XI / FIN. However, if an external
CMOS clock is attached to XI/FIN, XO should be left open.
46
1
Out
P-OUT /
TLDET*
Pixel Clock Output / DVI Detect Output
When the CH7010A is operating as a VGA to TV encoder in master
clock mode, this pin provides a pixel clock signal to the VGA
controller which is used as a reference frequency. The output is
selectable between 1X or 2X of the pixel clock frequency. The
output driver is driven from the DVDDV supply. This output has a
programmable tri-state. The capacitive loading on this pin should be
kept to a minimum.
When the CH7010A is operating as a DVI transmitter, this pin
provides an open drain output which pulls low when a termination
change has been detected on the HPDET input. The output is
released through serial port control.
47
1
Out
BCO/
V SYNC
Buffered Clock Output / Vertical Sync Output
This output pin provides a buffered clock output, driven by the
DVDD supply. The output clock can be selected using the BCO reg-
ister.
48
1
Out
C/H SYNC
Composite / Horizontal Sync Output
This pin can be selected to output a TV composite sync, TV
horizontal sync, or a buffered version of the VGA horizontal sync.
The output is driven from the DVDD supply.
50 – 55,
58 – 63
57, 56
12
In / Out
D[11] - D[0]
Data[11] through Data[0] Inputs
2
In
XCLK,
XCLK*
These pins accept the 12 data inputs from a digital video port of a
graphics controller. The levels are 0 to DVDDV, and the VREF
signal is used as the threshold level.
External Clock Inputs
These inputs form a differential clock signal input to the
CH7010A for use with the H, V, DE and D[11:0] data. If
differential clocks are not available, the XCLK* input should be
connected to VREF.
The output clocks from this pad cell are able to have their
polarities reversed under the control of the MCP bit (in register
1Ch).
Digital Supply Voltage (3.3V-3.6V)
Digital Ground
I/O Supply Voltage (3.3V to 1.1V)
DVI Transmitter Supply Voltage (3.3V-3.6V)
DVI Transmitter Ground
PLL Supply Voltage (3.3V-3.6V)
PLL Ground
DAC Supply Voltage (3.3V-3.6V)
DAC Ground
1, 12, 49
6, 11, 64
45
23, 29
20, 26, 32
18, 44
16, 17, 41
33
34, 40
3
3
1
2
3
2
3
1
2
Power
Power
Power
Power
Power
Power
Power
Power
Power
DVDD
DGND
DVDDV
TVDD
TGND
AVDD
AGND
VDD
GND
201-0000-038
Rev 2.1, 7/12/2004
5
DSP and ARM Processors
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