45732 AMD 780E Databook 3.10
© 2009 Advanced Micro Devices, Inc.
4-4
Proprietary
Power Rail Power-up Sequence
4.7
Power Rail Power-up Sequence
Figure 4-1 RS780E Power Rail Power-up Sequence
Table 4-5 RS780E Power Rail Power-up Sequence
Symbol
Parameter
Voltage Difference During Ramping
Minimum (V)
Maximum (V)
T11
3.3V rails ramp high relative to 1.8V Display, PLL,
and I/O Transform rails
0
2.1
T12
1.8V Display, PLL, and I/O Transform rails ramp
high relative to 1.1V PLL rails
0
No restrictions
T13
1.1V PLL rails ramp high relative to VDDC (1.1V)
0
No restrictions
T11
T12
T13
3.3V Rails
(AVDD, VDD33)
1.8V Display, PLL, and IO
Transform Rails
(PLLVDD18, IOPLLVDD18, VDDLT18,
VDDLTP18, VDDA18HTPLL, VDDA18PCIEPLL,
AVDDDI, AVDDQ, VDD18)
1.1V PLL Rails
(PLLVDD, IOPLLVDD)
1.1V VDDC
Note: There are no specific requirements for the following 1.1V or 1.2V rails: VDDHT, VDDHTRX, VDDHTTX, VDDPCIE