DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 937

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

Chapter 5: Dynamic Reconfiguration in Stratix IV Devices
Dynamic Reconfiguration Duration
February 2011 Altera Corporation
For writing values to the following PMA controls, the busy signal is asserted for 520
reconfig_clk clock cycles per channel for each of these controls:
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For reading the existing values of the following PMA controls, the busy signal is
asserted for 130 reconfig_clk clock cycles per channel for each of these controls. The
data_valid signal is then asserted after the busy signal goes low.
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For reading the existing values of the following PMA controls, the busy signal is
asserted for 260 reconfig_clk clock cycles per channel for each of these controls. The
data_valid signal is then asserted after the busy signal goes low.
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Offset Cancellation Duration
When the device powers up, the busy signal remains low for the first reconfig_clk
clock cycle. Offset cancellation control is only for the receiver channels. The
ALTGX_RECONFIG instance takes 18500 reconfig_clk clock cycles per channel for
Receiver only and Receiver and Transmitter channels. It takes 900 reconfig_clk
clock cycles per channel for Transmitter only channels to determine if the channel
under reconfiguration is a receiver channel or not. The ATLGX_RECONFIG requires
an additional 130,000 clock cycles for these values to take effect. The
ALTGX_RECONFIG instance takes approximately two reconfig_clk clock cycles per
channel for the unused logical channels.
To demonstrate offset cancellation duration, consider the following example:
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For this example, the ALTGX_RECONFIG instance consumes the following number
of reconfig_clk clock cycles for offset cancellation:
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The offset cancellation duration for the ALTGX_RECONFIG instance to reconfigure
the Transmitter only channel, Receiver only channel, non-existent logical channels 1,
2, and 3 = 149,406 cycles (900 +18,500 +6 + 130,000).
tx_preemp_0t (pre-emphasis control pre-tap)
tx_preemp_2t (pre-emphasis control second post-tap)
tx_preemp_1t_out (pre-emphasis control first post-tap)
tx_vodctrl_out (voltage output differential)
rx_eqctrl_out (equalizer control)
rx_eqdcgain_out (equalizer DC gain)
tx_preemp_0t_out (pre-emphasis control pre-tap)
tx_preemp_2t_out (pre-emphasis control second post-tap)
One ALTGX_RECONFIG instance is connected to two ALTGX instances.
ALTGX Instance 1 has one Transmitter only channel (logical_channel_address = 0)
ALTGX Instance 2 has one Receiver only channel (logical_channel_address = 4)
900 cycles for the Transmitter only channel
18,500 cycles for the Receiver only channel
2 cycles each for non-existent channels with logical_channel_addresses = 1, 2,
and 3 and 130,000 cycles as a baseline for the values to take affect.
Read Transaction Duration
Stratix IV Device Handbook Volume 2: Transceivers
5–91