
Chapter 3: Functional Description 3–47
Signals
February 2013 Altera Corporation Serial Digital Interface (SDI) MegaCore Function
User Guide
Figure 3–29 through Figure 3–37 show the behavior of some signals in Table 3–16.
Figure 3–28. Interface Signals for SDI Triple Standard Duplex Instance
Figure 3–29. Power-up Reset for the Receiver
Figure 3–30. Power-up Reset for the Transmitter
Note to Figure 3–30:
(1) Internally synchronized reset for the transmit circuits.
SDI Triple Standard Duplex Instance
rx_clk
rxdata[19:0]
rx_data_valid_out[1:0]
rx_std_flag_hd_sdn[0:0]
rx_status[10:0]
rx_std[1:0]
rx_trs
rx_eav
rx_xyz
xyz_valid
rx_anc_data[19:0]
rx_anc_valid[3:0]
rx_anc_error[3:0]
rx_video_format[7:0]
sdi_tx[0:0]
tx_status[0:0]
gxb_tx_clkout[0:0]
sdi_reconfig_fromgxb[16:0]
sdi_start_reconfig
rst_rx
rst_tx
rx_serial_refclk
refclk_rate
tx_serial_refclk
tx_serial_reflclk1 (optional)
tx_pclk
sdi_rx[0:0]
en_sync_switch
enable_hd_search
enable_sd_search
enable_3g_search
txdata[19:0]
tx_std[1:0]
tx_trs[0:0]
tx_ln[21:0]
enable_ln[0:0]
enable_crc[0:0]
gxb2_cal_clk/gxb4_cal_clk
sdi_reconfig_clk
sdi_reconfig_togxb[3:0]
sdi_reconfig_done
sdi_gxb_powerdown
rst_rx
rx_serial_refclk (74.25MHz)
rst_tx
0100
tx_pclk(74.25MHz)
tx_std[1:0]
rst_tx_sync (1)
Figure 3–31. Behavior of tx_std, tx_trs, and tx_ln Signals—425MA
tx_trs
txdata[19:10]
txdata[9:0]
tx_std[1:0]
tx_ln[21:11]
tx_pclk
3FF(Y) 000(Y) 000(Y) XYZ(Y)
3FF(C
11
) 000(C) 000(C XYZ(C)
11’d0
tx_ln[10:0]
11’d1 11’d2
000(Y) 000(Y) XYZ(Y)
000(C) 000(C XYZ(C)
3FF(Y)
3FF(C)
000(Y) 000(Y) XYZ(Y)
000(C) 000(C XYZ(C)
3FF(Y)
3FF(C)
EAV SAV
EAV
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