46136 AMD RX881 Databook 1.40
© 2011 Advanced Micro Devices, Inc.
3-8
Proprietary
Power Pins
3.8
Power Pins
THERMALDIODE_P,
THERMALDIODE_N
A-O
–
–
–
Diode connections to external SMBus microcontroller for
monitoring IC thermal characteristics.
VDDLT33
Other
–
–
–
These balls are only for maintaining pin-compatibility with earlier
generations of AMD IGPs or chipsets. They can either be
connected to a 3.3V rail or left unconnected on RX881 systems.
Table 3-9 Power Pins
Pin Name
Voltage
Pin
Count
Ball Reference
Pin Description
AVDD
3.3V
2
E12, F12
Connect these pins to ground.
AVDDDI
1.8V
1
F14
Connect the pin to ground.
AVDDQ
1.8V
1
H15
Connect the pin to ground.
IOPLLVDD
1.1V
1
AE24
Connect the pin to a 1.1V power rail.
IOPLLVDD18
1.8V
1
AE23
Connect the pin to the VDD18 power rail.
PLLVDD
1.V
1
A12
Connect the pin to ground.
PLLVDD18
1.8V
1
D14
Connect the pin to ground.
VDD_MEM
1.5/1.8V
6
AA11, AB10, AC10, AD10,
AE10, Y11
Connect these pins to ground.
VDD18_MEM
1.8V
2
AD11, AE11
Connect these pins ground.
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 PCIe graphics, SB, and GPP interfaces
VDDA18PCIEPLL
1.8V
2
D7, E7
1.8V I/O power for PCIe PLLs
VDDC
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
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
Connect these pins to ground
VDDLTP18
1.8V
1
A13
Connect the pin to ground
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 PCIe graphics, SB, and GPP interfaces
Total Power Pin Count
107
Table 3-8 Miscellaneous Pins (Continued)
Pin Name
Type
Power
Domain
Ground
Domain
Integrated
Termination
Functional Description