M1AFS250-FGG256I Actel Corporation, M1AFS250-FGG256I Datasheet - Page 148

• Manufacturer Part Number: M1AFS250-FGG256I
• Description: Actel Fusion Family Of Mixed Signal Fpgas
• Manufacturer: Actel Corporation

Device Architecture
Table 2-54 • Prescaler Control Truth Table—AV (x = 0), AC (x = 1), and AT (x = 3)
Table 2-55 • Analog Multiplexer Truth Table—AV (x = 0), AC (x = 1), and AT (x = 3)
Table 2-56 • Direct Analog Input Switch Control Truth Table—AV (x = 0), AC (x = 1), and AT (x = 3)
Table 2-57 • Voltage Polarity Control Truth Table—AV (x = 0), AC (x = 1), and AT (x = 3)*
2- 13 2
Control Lines
Bx[2:0]
000
001
010
011
100
101
110
111
Notes:
1. These are the only valid ranges for the Temperature Monitor Block Prescaler.
2. LSB voltage equivalences assume VAREF = 2.56 V.
Note:
1
1
*The B3[6] signal for the AT pad should be kept at logic 0 to accept only positive voltages.
Control Lines Bx[4]
Control Lines Bx[5]
Control Lines Bx[6]
Table 2-54
that the AT pin has a reduced number of available prescaler values.
Table 2-55
This MUX determines whether the signal routed to the ADC is the direct analog input, prescaled signal,
or output of either the Current Monitor Block or the Temperature Monitor Block.
Table 2-56
pins.
Table 2-57
pins. Note that the only valid setting for the AT pin is logic 0 to support positive voltages.
Factor, Pad to
0
0
1
1
ADC Input
0
1
0
1
Scaling
0.15625
0.3125
0.625
1.25
10.0
20.0
2.5
5.0
details the settings available to control the prescaler values of the AV, AC, and AT pins. Note
details the settings available to control the polarity of the signals coming to the AV, AC, and AT
details the settings available to control the MUX within each of the AV, AC, and AT circuits.
details the settings available to control the Direct Analog Input switch for the AV, AC, and AT
Conversion
LSB for an
8-Bit
(mV)
0.5
64
32
16
8
4
2
1
Control Lines Bx[3]
2
Conversion
LSB for a
0
1
0
1
10-Bit
R e visio n 1
0.125
(mV)
0.25
0.5
16
8
4
2
1
2
Input Signal Polarity
Direct Input Switch
Conversion
LSB for a
0.03125
Prescaler
Direct input
Current amplifier temperature monitor
Not valid
0.0625
Negative
12-Bit
0.125
Positive
(mV)
0.25
0.5
4
2
1
Off
On
2
ADC Connected To
0.127875 V
Full-Scale
0.25575 V
16.368 V
0.5115 V
Voltage
8.184 V
4.092 V
2.046 V
1.023 V
0.125 V
Range
0.25 V
Name
0.5 V
16 V
8 V
4 V
2 V
1 V