EP2SGX60CF780C4N Datasheet, PDF (51/316 Pages) Altera Corporation – Support for numerous single-ended and differential I/O standards

Table 2–16. Reset Signal Map to Stratix II GX Blocks
Stratix II GX Architecture
Reset Signal
rx_digitalreset
vvvvv
vv
rx_analogreset
v
v
v
tx_digitalreset v v
vv
gxb_powerdown v v v v v v v v v v v v v v v v v
gxb_enable
vvvvvvvvvvvvvvvvv
f
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 DC and Switching Characteristics
chapter in volume 1 of the Stratix II GX Handbook.
Altera Corporation
October 2007
2–43
Stratix II GX Device Handbook, Volume 1