Altera MAX 10 Power - Manual (Page 7)

Power-On Reset Circuitry
The POR circuitry keeps the MAX 10 device in the reset state until the POR monitored power supply
outputs are within the recommended operating range of the maximum power supply ramp time, t
RAMP
.
If the ramp time, t
RAMP
, is not met, the MAX 10 device I/O pins and programming registers remain tri-
stated, during which device configuration could fail.
The MAX 10 device POR circuit monitors the following power rails during power up regardless of the
power supply device options:
• V
CC
or regulated V
CC_ONE
• V
CCIO
of banks 1B and 8 (2)
• V
CCA
The POR circuitry also ensures V
CCIO
level of I/O banks 1B and 8 (2) that contain configuration pins reach
an acceptable level before configuration is triggered.
Power Supplies Monitored and Not Monitored by the POR Circuitry
Table 2-3: Power Supplies Monitored and Not Monitored by the POR Circuitry
Power Supply Device Options Power Supplies Monitored Power Supplies Not Monitored
Single-supply device
• Regulated V
CC_ONE
• V
CCA
• V
CCIO
(3)
—
Dual-supply device
• V
CC
• V
CCA
• V
CCIO
(3)
• V
CCD_PLL
• V
CCA_ADC
• V
CCINT
The MAX 10 POR circuitry uses an individual POR-detecting circuitry to monitor each of the configura‐
tion-related power supplies independently. The main POR circuitry is gated by the outputs of all the
individual POR detectors. The main POR circuitry waits for all individual POR circuitries to release the
POR signal before allowing the control block to start programming the device. The main POR is released
after the last ramp-up power reaches the POR trip level followed by a POR delay.
By default, Quartus
® II assigns POR delay time to standard POR delay. For some of the applications that
need fast wake-up to begin operation, you can enable fast POR delay time on the Quartus II programmer
user interface.
(2) V
CCIO
of banks 1 and 8 for the 10M02 device.
(3) For banks 1B and 8 for all MAX 10 devices and banks 1 and 8 for the 10M02 device.
2-4 Power-On Reset Circuitry
UG-M10PWR
2015.02.09
Altera Corporation MAX 10 Power Management Features and Architecture
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