Transceivers
Table 2–6 shows the reset signals available in Arria GX devices and the
transceiver circuitry affected by each signal.
Table 2–6. Reset Signal Map to Arria GX Blocks
Reset Signal
v
v
v
v
v
v
rx_digitalreset
rx_analogreset
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
tx_digitalreset
gxb_powerdown
gxb_enable
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
Calibration Block
Arria GX devices use the calibration block to calibrate on-chip
termination for the PLLs and their associated output buffers and the
terminating resistors on the transceivers. The calibration block counters
the effects of process, voltage, and temperature (PVT). The calibration
block references a derived voltage across an external reference resistor to
calibrate the on-chip termination resistors on Arria GX devices. The
calibration block can be powered down. However, powering down the
calibration block during operations may yield transmit and receive data
errors.
2–30
Altera Corporation
Arria GX Device Handbook, Volume 1
May 2008