Datasheet

Electrical Specifications
96 Datasheet, Volume 1
7.3 Voltage Identification (VID)
The processor uses three signals for the serial voltage identification interface to support
automatic selection of voltages. Table 7.4 specifies the voltage level corresponding to
the eight bit VID value transmitted over serial VID. A ‘1’ in this table refers to a high
voltage level and a ‘0’ refers to a low voltage level. If the voltage regulation circuit
cannot supply the voltage that is requested, the voltage regulator must disable itself.
See the VR12/IMVP7 PWM Specification for further details. The VID codes will change
due to temperature and/or current load changes in order to minimize the power of the
part. A voltage range is provided in Table 7.4. The specifications are set so that one
voltage regulator can operate with all supported frequencies.
Individual processor VID values may be set during manufacturing so that two devices
at the same core frequency may have different default VID settings. This is shown in
the VID range values in Table 7-5. The processor
provides the ability to operate while
transitioning to an adjacent VID and its associated voltage. This will represent a DC
shift in the loadline.
Note: Transitions above the maximum specified VID are not permitted. Table 7-5 includes VID
step sizes and DC shift ranges. Minimum and maximum voltages must be maintained.
At condition outside functional operation condition limits, neither functionality nor long
term reliability can be expected. If a device is returned to conditions within functional
operation limits after having been subjected to conditions outside these limits, but
within the absolute maximum and minimum ratings, the device may be functional, but
with its lifetime degraded on exposure to conditions exceeding the functional operation
condition limits.
The VR used must be capable of regulating its output to the value defined by the new
VID values issued. DC specifications for dynamic VID transitions are included in
Table 7-5 and Table 7-10.
Table 7-1. IMVP7 Voltage Identification Definition (Sheet 1 of 3)
VID
7
VID
6
VID
5
VID
4
VID
3
VID
2
VID
1
VID
0
HEX V
CC_MAX
VID
7
VID
6
VID
5
VID
4
VID
3
VID
2
VID
1
VID
0
HEX V
CC_MAX
00000000000.00000 1 0000000800.88500
00000001010.25000 1 0000001810.89000
00000010020.25500 1 0000010820.89500
00000011030.26000 1 0000011830.90000
00000100040.26500 1 0000100840.90500
00000101050.27000 1 0000101850.91000
00000110060.27500 1 0000110860.91500
00000111070.28000 1 0000111870.92000
00001000080.28500 1 0001000880.92500
00001001090.29000 1 0001001890.93000
000010100A0.29500 1 00010108A0.93500
000010110B0.30000 1 00010118B0.94000
000011000C0.30500 1 00011008C0.94500
000011010D0.31000 1 00011018D0.95000
000011100E0.31500 1 00011108E0.95500
000011110F0.32000 1 00011118F0.96000
00010000100.32500 1 0010000900.96500
00010001110.33000 1 0010001910.97000
00010010120.33500 1 0010010920.97500
00010011130.34000 1 0010011930.98000
00010100140.34500 1 0010100940.98500
00010101150.35000 1 0010101950.99000
00010110160.35500 1 0010110960.99500
00010111170.36000 1 0010111971.00000