ep2sgx30c Altera Corporation, ep2sgx30c Datasheet - Page 51

• Manufacturer Part Number: ep2sgx30c
• Description: Stratix Ii Gx Device Data Sheet
• Manufacturer: Altera Corporation

Altera Corporation
October 2007
rx_digitalreset
rx_analogreset
tx_digitalreset
gxb_powerdown
gxb_enable
Table 2–16. Reset Signal Map to Stratix II GX Blocks
Reset Signal
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Voltage Reference Capabilities
Stratix II GX transceivers provide voltage reference and bias circuitry. To
set up internal bias for controlling the transmitter output driver voltage
swings, as well as to provide voltage and current biasing for other analog
circuitry, the device uses an internal bandgap voltage reference of 0.7 V.
An external 2-KΩ resistor connected to ground generates a constant bias
current (independent of power supply drift, process changes, or
temperature variation). An on-chip resistor generates a tracking current
that tracks on-chip resistor variation. These currents are mirrored and
distributed to the analog circuitry in each channel.
For more information, refer to the
chapter in volume 1 of the Stratix II GX Handbook.
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Stratix II GX Device Handbook, Volume 1
DC and Switching Characteristics
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Stratix II GX Architecture
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2–43
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