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參數(shù)資料
| 型號： | TFP9431CPAP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, POWER, THERMALLY ENHANCED, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 7/18頁 |
| 文件大小： | 241K |
| 代理商： | TFP9431CPAP |
TFP9431
PanelBus
DVI RECEIVER WITH TRIPLE DAC
SLDS122A – MARCH 2000 – REVISED JUNE 2000
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TFP9431 modes of operation
The TFP9431 provides systems design flexibility and value by providing the system designer with configurable
options or modes of operation to support varying system architectures. The following table outlines the various
panel modes that can be supported.
PANEL
PIXEL RATE
ODCK LATCH
EDGE
ODCK
DFO
PIXS
OCK_INV
TFT or 16-bit DSTN
1 pix/clock
Falling
Free run
0
TFT or 16-bit DSTN
1 pix/clock
Rising
Free run
0
1
24-bit DSTN
1 pix/clock
Falling
Gated low
1
0
NONE
1 pix/clock
Rising
Gated low
1
0
1
TFP9431 output driver configurations
The TFP9431 provides flexibility by offering various output driver features that can be used to optimize power
consumption, ground-bounce and power-supply noise. The following sections outline the output driver features
and their effects.
Output driver power down (PDO = low), Pulling PDO low will place all the output drivers, except CTL1 and
SCDT, into a high-impedance state and the DAC outputs will be powered down. A weak pulldown
(approximately 10
A) will gradually pull these Hi-Z outputs to a low level to prevent the outputs from floating.
The SCDT output which indicates link-disabled or link-inactive can be tied directly to the PDO input to disable
the output drivers when the link is inactive or when the cable is disconnected. An internal pullup on the PDO
pin will default the TFP9431 to the normal nonpower down output drive mode if left unconnected.
Drive Strength (ST = high for high drive strength, ST=low for low drive strength.) The TFP9431 allows for
selectable output drive strength on the data, control and ODCK outputs. See the dc specifications table for the
values of IOH and IOL current drives for a given ST state. The high output strength offers approximately two times
the drive as the low output drive strength.
Power Management. The TFP9431 offers several system power management features. The following table
outlines the basic TFP9431 power modes.
POWER MODE
IDD
NOTES
Normal Mode
PIX = Low
TBD
Normal operation pixel rate = 165 MHz
1-pixel/clock
Normal Mode
PIX = High
TBD
Normal operation pixel rate = 165 MHz
2-pixel/clock (ODCK = 82.5 MHz)
Power Down
PD = Low
TBD
System power down.
All outputs are Hi-Z with a weak pulldown (10
A) to ground
All inputs are disabled except PD
Output driver power down PDO= Low
TBD
Cable connected and link is inactive (Can use SCDT to drive PDO)
All outputs except SCDT and CTL1 are Hi-Z with a weak pulldown (10
A) to ground.
ICC is the calculated as the sum of all VDD power supply currents (AVCC, DVCC, OVCC, PVCC)
Measured when cable is disconnected from inputs.
Both PDO and PD have internal pullups so if left unconnected they will default the TFP9431 to normal operating
modes.
The TFP9431 power down (PD = low) is a complete power down in that it powers down the digital core, the
analog circuitry, and output drivers. All output drivers are placed into a Hi-Z state with a weak pulldown (10
A)
to ground. All inputs are disabled except for the PD input. The TFP9431 will not respond to any digital or analog
inputs until PD is pulled high.
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