Miscellaneous Pins; Power Pins; Table 3-14 Miscellaneous Pins; Table 3-15 Power Pins - AMD 780E Technical Reference Manual

3.12

Miscellaneous Pins

Table 3-14 Miscellaneous Pins

Pin Name
AUX_CAL
DDC_CLK0/AUX0P
DDC_DATA0/AUX0N
DDC_CLK1/AUX1P
DDC_DATA1/AUX1N
HPD
I2C_CLK
I2C_DATA
NC
STRP_DATA
TESTMODE
THERMALDIODE_P,
THERMALDIODE_N
TMDS_HPD
VDDLT33
3.13

Power Pins

Table 3-15 Power Pins

Pin Name
AVDD
AVDDDI
45732 AMD 780E Databook 3.10
3-12
Power Ground
Type
Domain Domain
I VDD33 VSS
I/O VDD33 VSS
I/O VDD33 VSS
I/O VDD33 VSS
I/O VDD33 VSS
I VDD33 VSS
I/O VDD33 VSS
I/O VDD33 VSS
– – –
I/O VDD33 VSS
I VDD33 VSS
A-O – –
I/O VDD33 VSS
Other – –
Pin
Voltage Count Ball Reference
3.3V 2 E12, F12
1.8V 1 F14
Integrated
Functional Description
Termination
50k
programmable: Calibration for auxiliary pads.
PU/PD/non
50k DDC Clock 0 for displays, or AUX0P of the auxiliary pair for the
programmable: DisplayPort™ connected onto lane 0 to 3 of the PCI-E external
PU/PD/none graphics interface. Can also be used as a GPIO.
50k DDC Data Channel 0 for displays, or AUX0N of the auxiliary pair for
programmable: the DisplayPort connected onto lane 0 to 3 on the PCI-E external
PU/PD/none graphics interface. Can also be used as a GPIO.
50k DDC Clock 1 for displays, or AUX1P of the auxiliary pair for the
programmable: DisplayPort connected onto lane 4 to 7 of the PCI-E external
PU/PD/none graphics interface. Can also be used as a GPIO.
50k DDC Data Channel 1 for displays, or AUX1N of the auxiliary pair for
programmable: the DisplayPort connected onto lane 4 to 7 on the PCI-E external
PU/PD/none graphics interface. Can also be used as a GPIO.
50k
programmable: Hot plug detect for DisplayPort. Can also be used as GPIO.
PU/PD/none
50k
2
I C™ interface clock signal.It can also be used as GPIO. The signal
programmable:
is 5V-tolerant.
PU/PD/none
50k
2
I C interface data signal. It can also be used as GPIO. The signal
programmable:
is 5V-tolerant.
PU/PD/none
– No connect. These pins should be left unconnected to anything.
2
50k I C interface data signal for external EEPROM based strap loading.
programmable: Can also be used as GPIO, or as output to the voltage regulator for
PU/PD/none pulse-width modulation of RS780E's core voltage.
When High, puts the RS780E in test mode and disables the
–
RS780E from operating normally.
Diode connections to external SMBus microcontroller for
–
monitoring IC thermal characteristics.
TMDS Hot Plug Detect. It monitors the hot-plug line for panel
50k detection. It is a 3.3V CMOS compatible input. When not used for
programmable: hot plug detection, it can also be used as output to the voltage
PU/PD/none regulator for pulse-width modulation of various voltages on the
motherboard.
These balls are only for maintaining pin-compatibility with the
– RS740-series IGPs AMD chipsets. They can either be connected to
a 3.3V rail or left unconnected on RS780E systems.
Pin Description
Dedicated power for the DAC. Effort should be made at the board
level to provide as clean a power as possible to this pin to avoid
noise injection, which can affect display quality. Adequate
decoupling should be provided between this pin and AVSS.
Dedicated digital power for the DAC
Miscellaneous Pins
© 2009 Advanced Micro Devices, Inc.
Proprietary