Altera Serial Digital Interface (SDI) MegaCore Function - Manual (Page 64)

3–34 Chapter 3: Functional Description
Block Description
Serial Digital Interface (SDI) MegaCore Function February 2013 Altera Corporation
User Guide
Figure 3–22 shows the block diagram of how the SDI MegaCore function and the
ALTPLL_RECONFIG megafunction are connected.
The ALTPLL_RECONFIG block handles the programming of the ROM contents into
the transceiver megafunction. The ROM holds the transceiver setting information for
3G-SDI video standard. As the setup for SD-SDI is similar to 3G-SDI, only two
settings are required: one for SD-SDI and 3G-SDI, and one for HD-SDI.
The reconfiguration control logic selects the correct transceiver setting and also
provides the handshaking between the SDI MegaCore function and the
ALTPLL_RECONFIG block. The PLL reprogramming signals for the transceiver are
brought to the top-level interface of the SDI MegaCore function. This interface is only
available when you select Use PLL reconfiguration for transceiver dynamic
reconfiguration
option in the SDI parameter editor. You must connect this interface
only to the ALTPLL_RECONFIG block.
Figure 3–22. Transceiver Dynamic Reconfiguration Block Diagram Using PLL Reconfiguration Mode
ALTPLL_RECONFIG
RECONFIG
Control Logic
ALTGX_INST
Protocol
SDI IP Core - Receiver
User Logic
Encrypted RECONFIG Megafunction
Encrypted SDI IP Core
ROM 3G
ROM HD
0
1 pll_areset
pll_configupdate
pll_scanclk
pll_scanclkena
pll_scandata
sdi_start_reconfig
rx_std
pll_scandataout
pll_scandone rom_address_out
write_rom_enable
write_from_rom
reconfig
rom_address_out
rom_data_in