ch7009a ETC-unknow, ch7009a Datasheet - Page 3

• Manufacturer Part Number: ch7009a
• Description: Chrontel Ch7009 Dvi / Tv Output Device
• Manufacturer: ETC-unknow

CHRONTEL
Table 1: Pin Description
201-0000-035 Rev 1.1, 5/8/2000
64-Pin
LQFP
2
3
4
5
7
8
9
10
13
# Pins Type
1
1
1
1
2
2
1
1
1
In
In
In/Out
In/Out
In/Out
In/Out
In
In
In
Symbol
DE
VREF
H
V
GPIO[1] /
TLDET*
GPIO[0]
HPDET
AS
RESET*
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 links. The TV-
Out function uses H and V sync signals as reference to active
video.
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.
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.
Vertical Sync Input / Output
When the SYO bit is low, this pin accepts a vertical sync input
for use with the input data.
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.
General Purpose Input - Output[1] /
DVI Link Detect Output (internal pull-up)
This pin provides a general purpose I/O controlled via the IIC
bus. The internal pull-up will be to the DVDD supply.
When the GPIO[1] pin is configured as an input, this pin can
be used to output the DVI link 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
IIC control.
General Purpose Input - Output[0] (internal pull-up)
This pin provides a general purpose I/O controlled via the IIC
bus. This allows an external switch to be used to select NTSC
or PAL at power-up. The internal pull-up will be to the DVDD
supply.
Hot Plug Detect (internal pull-down)
This input pin determines whether the DVI link 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.
Address Select (Internal pull-up)
This pin determines the IIC address of the device
(1,1,1,0,1,AS*,AS).
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 IIC register.
The amplitude will be 0 to
CH7009A
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