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Ground Pins
© 2009 Advanced Micro Devices, Inc.
45732 AMD 780E Databook 3.10
Proprietary
3-13
3.14
Ground Pins
AVDDQ
1.8V
1
H15
DAC Bandgap Reference Voltage
IOPLLVDD
1.1V
1
AE24
1.1V power for memory I/O PLLs
IOPLLVDD18
1.8V
1
AE23
1.8V power for memory I/O PLLs
PLLVDD
1.V
1
A12
1.1V Power for system PLLs
PLLVDD18
1.8V
1
D14
1.8V power for system PLLs
VDD_MEM
1.5/1.8V
6
AA11, AB10, AC10, AD10,
AE10, Y11
Isolated power for side-port memory interface.
VDD18_MEM
1.8V
2
AD11, AE11
1.8V power for side-port memory interface
VDDA18HTPLL
1.8V
1
H17
I/O power for HyperTransport PLL
VDDA18PCIE
1.8V
15
AA9, AB9, AD9, AE9, H9,
J10, K10, L10, M10, P10,
R10, T10, U10, W9, Y9
1.8V I/O power for PCI-E graphics, SB, and GPP interfaces
VDDA18PCIEPLL
1.8V
2
D7, E7
1.8V I/O power for PCI-E PLLs
VDDC
1.0-1.1V
22
J11, J14, J16, K12, K15,
L11, L14, M12, M13, M15,
N12, N14, P11, P13, P14,
R12, R15, T11, T14, T15,
U12, U16
Core power
Note:
Variable core voltage is not supported on platforms that
support either (a) PCI-E Gen2, or (b) DDR3-1200 side-port frame
buffer memory, as these features require a fixed core voltage of
1.1V.
VDD18
1.8V
2
F9, G9
1.8V I/O transform power
VDD33
3.3V
2
H11, H12
3.3V I/O power
VDDHT
1.1V
7
J17, K16, L16, M16, P16,
R16, T16
Digital I/O power for HyperTransport™ interface
VDDHTRX
1.1V
7
A23, B23, D22, E21, F20,
G19, H18
I/O power for HyperTransport receive interface
VDDHTTX
1.2V
13
AA21, AB22, AC23, AD24,
AE25, M17, P17, R17, T17,
U17, V18, W19, Y20
I/O power for HyperTransport transmit interface
VDDLT18
1.8V
2
A15, B15
1.8V I/O power for the interface
VDDLTP18
1.8V
1
A13
Power for PLL macro.
VDDPCIE
1.1V
17
A6, B6, C6, D6, E6, F6, G7,
H8, J9, K9, L9, M9, P9, R9,
T9, U9, V9
Main I/O power for PCI-E graphics, SB, and GPP interfaces
Total Power Pin Count
107
Table 3-16 Ground Pins
Pin Name
Pin Count
Ball Reference
Comments
AVSSDI
1
G15
Dedicated digital ground for the DAC (1.8V)
AVSSQ
1
H14
Dedicated ground for the Band Gap Reference. Effort should be
made at the board level to provide as clean a ground as possible
to this pin to avoid noise injection, which can affect display quality.
Adequate decoupling should be provided between this pin and
AVDD.
IOPLLVSS
1
AD23
Ground for system PLLs
PLLVSS
1
B12
Ground pin for graphics core PLL
RED#, GREEN#,
BLUE#
3
G17, F18, F19
Grounds for the DAC. These pins must be connected directly to
ground.
Table 3-15 Power Pins (Continued)
Pin Name
Voltage
Pin
Count Ball Reference
Pin Description