M1AFS250-FGG256I Actel Corporation, M1AFS250-FGG256I Datasheet - Page 147

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

Table 2-53 • Analog Quad ACM Byte Assignment
Byte
Byte 0
(AV)
Byte 1
(AC)
Byte 2
(AG)
Byte 3
(AT)
Analog Quad ACM Description
Table 2-53
Analog Block.
each byte. Subsequent tables will explain each bit setting and how it corresponds to a particular
configuration. After 3.3 V and 1.5 V are applied to Fusion, Analog Quad configuration registers are
loaded with default settings until the initialization and configuration state machine changes them to user-
defined settings.
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
maps out the ACM space associated with configuration of the Analog Quads within the
Table 2-53
Signal (Bx)
B0[0]
B0[1]
B0[2]
B0[3]
B0[4]
B0[5]
B0[6]
B0[7]
B1[0]
B1[1]
B1[2]
B1[3]
B1[4]
B1[5]
B1[6]
B1[7]
B2[0]
B2[1]
B2[2]
B2[3]
B2[4]
B2[5]
B2[6]
B2[7]
B3[0]
B3[1]
B3[2]
B3[3]
B3[4]
B3[5]
B3[6]
B3[7]
shows the byte assignment within each quad and the function of each bit within
Scaling factor control – prescaler
Analog MUX select
Current monitor switch
Direct analog input switch
Selects V-pad polarity
Prescaler op amp mode
Scaling factor control – prescaler
Analog MUX select
Direct analog input switch
Selects C-pad polarity
Prescaler op amp mode
Internal chip temperature monitor
Spare
Current drive control
Spare
Spare
Selects G-pad polarity
Selects low/high drive
Scaling factor control – prescaler
Analog MUX select
Direct analog input switch
–
Prescaler op amp mode
R e v i s i o n 1
Function
Actel Fusion Family of Mixed Signal FPGAs
Highest voltage range
Prescaler
Off
Off
Positive
Power-down
Highest voltage range
Prescaler
Off
Positive
Power-down
Off
–
Lowest current
–
–
Positive
Low drive
Highest voltage range
Prescaler
Off
–
Power-down
Default Setting
2- 131