M1AFS250-FGG256I Actel Corporation, M1AFS250-FGG256I Datasheet - Page 105

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

Figure 2-70 • Analog Quad Direct Digital Input Configuration
Off-Chip
On-Chip
Pads
Direct Digital Input
The AV, AC, and AT pads can also be configured as high-voltage digital inputs
pads are 12 V–tolerant, the digital input can also be up to 12 V. However, the frequency at which these
pads can operate is limited to 10 MHz.
To enable one of these analog input pads to operate as a digital input, its corresponding Digital Input
Enable (DENAxy) pin on the Analog Block must be pulled High, where x is either V, C, or T (for AV, AC,
or AT pads, respectively) and y is in the range 0 to 9, corresponding to the appropriate Analog Quad.
When the pad is configured as a digital input, the signal will come out of the Analog Block macro on the
appropriate DAxOUTy pin, where x represents the pad type (V for AV pad, C for AC pad, or T for AT pad)
and y represents the appropriate Analog Quad number. Example: If the AT pad in Analog Quad 5 is
configured as a digital input, it will come out on the DATOUT5 pin of the Analog Block macro.
AV
Prescaler
Digital
Input
Monitor Block
Voltage
(DAVOUTx)
To FPGA
To Analog MUX
Monitor / Instr
AC
Prescaler
Amplifier
Digital
Current
Input
Monitor Block
(DACOUTx)
Current
To FPGA
Analog Quad
To Analog MUX
R e v i s i o n 1
From FPGA
Gate Driver
MOSFET
(GDONx)
Power
AG
Driver
Gate
Actel Fusion Family of Mixed Signal FPGAs
AT
Temperature
Digital
Input
Prescaler
Monitor
(Figure
Monitor Block
Temperature
(DATOUTx)
To FPGA
2-70). As these
To Analog MUX
2- 89