7.1. Transmitter Signals
Signal | Width | Direction | Description |
---|---|---|---|
JESD204C TX MAC Clocks and Resets | |||
j204c_pll_refclk | 1 | Input | TX PLL reference clock for the transceiver. |
j204c_txlink_clk | 1 |
Input |
This clock is equal to the TX data rate divided by 132. Generated from the same PLL as txframe_clk. |
j204c_txlclk_ctrl | 1 |
Input |
Generated from the same PLL as txlink_clk and txframe_clk. This clock acts as a phase information for txlink_clk to handle CDC between txlink_clk and txframe_clk. |
j204c_txframe_clk | 1 |
Input |
Synchronous with txlink_clk. Frequency is equal, 2x, or 4x txlink_clk, based on the selected option for the frame clock frequency multiplier parameter. Generated from the same PLL as txlink_clk. . |
j204c_txfclk_ctrl | 1 |
Input |
Generated from the same PLL as txlink_clk and txframe_clk. This clock acts as a phase information for txframe_clk to handle CDC between txlink_clk and txframe_clk. |
j204c_tx_avs_clk | 1 |
Input |
Avalon® memory-mapped interface clock. |
j204c_reconfig_clk | 1 | Input |
Transceiver reconfiguration clock. In duplex mode, both TX and RX share the same reconfig pins. |
j204c_tx_rst_n | 1 |
Input |
Active-low asynchronous reset signal for MAC LL and TL. |
j204c_tx_phy_rst_n | 1 | Input |
Active-low asynchronous reset signal for PHY. |
j204c_tx_avs_rst_n | 1 | Input |
Active-low asynchronous reset signal for TX Avalon® memory-mapped interface. |
j204c_reconfig_reset | 1 | Input |
Active-high reset signal for transceiver reconfiguration. In duplex mode, both TX and RX share the same reconfig pins. |
Signal |
Width |
Direction |
Description |
Transceiver Interface | |||
tx_serial_data | L |
Output |
Differential high speed serial output data. The clock is embedded in the serial data stream. |
tx_serial_data_n | L |
Output |
Differential high speed serial output data. The clock is embedded in the serial data stream. |
tx_ready | L |
Output |
Indicates that the transceiver TX (per lane) is ready. |
tx_pma_ready | L |
Output |
Indicates that the transceiver TX PMA (per lane) is ready. |
j204c_reconfig_read | 1 |
Input |
During duplex mode, both TX and RX share the same reconfig pins. |
j204c_reconfig_write | 1 |
Input |
During duplex mode, both TX and RX share the same reconfig pins. |
j204c_reconfig_address | ceil (log2(L)) +19 |
Input |
During duplex mode, both TX and RX share the same reconfig pins. The lower 19 bits specify the address, the upper bits (log2(L)) specify the channel. If L=1, total address bit is always 19 bits. |
j204c_reconfig_readdata | 8 |
Output |
During duplex mode, both TX and RX share the same reconfig pins. |
j204c_reconfig_writedata | 8 |
Output |
During duplex mode, both TX and RX share the same reconfig pins. |
j204c_reconfig_waitrequest |
1 |
Output |
Wait request signal. During duplex mode, both TX and RX share the same reconfig pins. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Avalon® Memory-Mapped Interface | |||
j204c_tx_avs_chipselect | 1 |
Input |
When this signal is present, the slave port ignores all Avalon® memory-mapped signals unless this signal is asserted. This signal must be used in combination with read or write. If the Avalon® memory-mapped bus does not support chip select, you are recommended to tie this port to 1. |
j204c_tx_avs_address | 10 |
Input |
For Avalon® memory-mapped slave, each slave access is based on byte-based offset. For example, address = 0 selects the first four bytes of the slave register and the address = 4 selects the next four bytes of the slave register space. |
j204c_tx_avs_writedata | 32 |
Input |
32-bit data for write transfers. The width of this signal and the j204c_tx_avs_readdata[31:0] signal must be the same if both signals are present. |
j204c_tx_avs_read | 1 |
Input |
This signal is asserted to indicate a read transfer. This is an active high signal and requires the j204c_tx_avs_readdata[31:0] signal to be in use. |
j204c_tx_avs_write | 1 |
Input |
This signal is asserted to indicate a write transfer. This is an active high signal and requires the j204c_tx_avs_writedata[31:0] signal to be in use. |
j204c_tx_avs_readdata | 32 |
Output |
32-bit data driven from the Avalon® memory-mapped slave to master in response to a read transfer. |
j204c_tx_avs_waitrequest | 1 |
Output |
This signal is asserted by the Avalon® memory-mapped slave to indicate that it is unable to respond to a read or write request. The JESD204C Intel® FPGA IP ties this signal to 0 to return the data in the access cycle. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Avalon® Streaming Interface (Data Channel) | |||
j204c_tx_avst_data | M*S*WIDTH_MULP*N |
Input |
The minimum data width = M*S*N. Indicates the converter samples that will be processed by TL. The data format is big endian. If L=1 and M*S*WIDTH_MULP*N=128, the first octet is located at bit[127:120], second octet at bit[119:112], and the last octet at bit[7:0]. If more than one lane is instantiated, lane 0 data is always located in the upper M*S*WIDTH_MULP*N bit data lane, followed by the next lane, with the first octet position for lane 0 is at MSB. |
j204c_tx_avst_control | M*S*WIDTH_MULP*CS | Input |
Control bits to be inserted as part of CS parameter. |
j204c_tx_avst_valid | 1 |
Input |
Indicates whether the data from the application layer is valid or invalid. The Avalon® streaming sink interface in the TX core cannot be backpressured and assumes that the data is always valid on every cycle when the j204c_tx_avst_ready signal is asserted.
|
j204c_tx_avst_ready | 1 |
Output |
Indicates that the Avalon® streaming sink interface in the TX core is ready to accept data. The Avalon® streaming sink interface asserts this signal on the JESD204C transport state of USER_DATA phase. The ready latency is 0. |
j204c_tx_frame_ready | 1 |
Output |
Indicates that the link layer is ready to accept data. The link layer asserts this signal on a predetermined time before the assertion of the j204c_tx_avst_ready signal. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Command (Command Channel) | |||
j204c_tx_cmd_data | L*n |
Input |
Indicates a 6/18-bit user command (per lane) at txlink_clk clock rate. The data format is big endian. If more than one lane is instantiated, lane 0 data is always located at the upper 18 bits or 6 bits of data. Lane L is located at bit[17:0] or bit[5:0], with the first command bit position for lane L at bit[17] or bit[5].
Note: n=6 for CRC-12 operation and n =18 for standalone command channel
|
j204c_tx_cmd_valid | 1 |
Input |
Indicates whether the command from the application layer is valid or invalid. The Avalon® streaming sink interface in the TX core cannot be backpressured and assumes that data is always valid on every cycle when the j204c_tx_cmd_ready signal is asserted.
|
j204c_tx_cmd_ready | 1 |
Output |
Indicates that the Avalon® streaming sink interface in the TX core is ready to accept command. The Avalon® streaming sink interface asserts this signal on the JESD204C link/transport state of USER_DATA phase. The ready latency is 0. |
Signal |
Width |
Direction |
Description |
JESD204C Interface | |||
j204c_tx_sysref | 1 |
Input |
SYSREF signal for JESD204C Subclass 1 implementation. For Subclass 0 mode, tie-off this signal to 0. |
j204c_tx_somb | 1 |
Output |
Start of multiblock. |
j204c_tx_soemb | 1 |
Output |
Start of extended multiblock. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC CSR | |||
j204c_tx_csr_l | 4 |
Output |
Indicates the number of active lanes for the link. The transport layer can use this signal as a compile-time parameter. |
j204c_tx_csr_f | 8 |
Output |
Indicates the number of octets per frame. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_m | 8 |
Output |
Indicates the number of converters for the link. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_cs | 2 |
Output |
Indicates the number of control bits per sample. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_n | 5 |
Output |
Indicates the converter resolution. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_np | 5 |
Output |
Indicates the total number of bits per sample. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_s | 5 |
Output |
Indicates the number of samples per converter per frame cycle. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_hd | 1 |
Output |
Indicates the high density data format. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_cf | 5 |
Output |
Indicates the number of control words per frame clock period per link. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_e | 8 | Output |
LEMC period |
j204c_tx_csr_testmode | 4 |
Output |
0000: No test mode 0001: Scrambler disabled Other values are reserved. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Out-of-band (OOB) | |||
j204c_tx_int | 1 |
Output |
Interrupt pin for the JESD204C Intel® FPGA IP. Interrupt is asserted when any error or synchronization request is detected. Configure the tx_err_enable register to set the type of error that can trigger an interrupt. |
j204c_tx2rx_lbdata | L*132 | Output |
Output as 132-bit width data before the TX gearbox to connect to the RX core (same signal name) for 2-block loopback function. If L>0, LSB of this bus is mapped to lane 0. MSB is mapped to lane L–1. |
Signal | Width | Direction | Description |
---|---|---|---|
JESD204C TX MAC Clocks and Resets | |||
j204c_txlink_clk | 1 |
Input |
This clock is equal to the TX data rate divided by 132. Generated from the same PLL as txframe_clk. |
j204c_txlclk_ctrl | 1 |
Input |
Generated from the same PLL as txlink_clk and txframe_clk. This clock acts as a phase information for txlink_clk to handle CDC between txlink_clk and txframe_clk. |
j204c_txframe_clk | 1 |
Input |
Synchronous with txlink_clk. Frequency is equal, 2x, or 4x txlink_clk, based on the selected option for the frame clock frequency multiplier parameter. Generated from the same PLL as txlink_clk. . |
j204c_txfclk_ctrl | 1 |
Input |
Generated from the same PLL as txlink_clk and txframe_clk. This clock acts as a phase information for txframe_clk to handle CDC between txlink_clk and txframe_clk. |
j204c_tx_avs_clk | 1 |
Input |
Avalon® memory-mapped interface clock. |
j204c_txphy_clk | 1 |
Input |
This clock is equal to the TX data rate divided by 64. Asynchronous with frame or link clock. |
j204c_tx_rst_n | 1 |
Input |
Active-low asynchronous reset signal for MAC LL and TL. |
j204c_tx_phy_rst_n | 1 | Input |
Active-low asynchronous reset signal for PHY. |
j204c_tx_avs_rst_n | 1 | Input |
Active-low asynchronous reset signal for TX Avalon® memory-mapped interface. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Avalon® Memory-Mapped Interface | |||
j204c_tx_avs_chipselect | 1 |
Input |
When this signal is present, the slave port ignores all Avalon® memory-mapped signals unless this signal is asserted. This signal must be used in combination with read or write. If the Avalon® memory-mapped bus does not support chip select, you are recommended to tie this port to 1. |
j204c_tx_avs_address | 10 |
Input |
For Avalon® memory-mapped slave, each slave access is based on byte-based offset. For example, address = 0 selects the first four bytes of the slave register and the address = 4 selects the next four bytes of the slave register space. |
j204c_tx_avs_writedata | 32 |
Input |
32-bit data for write transfers. The width of this signal and the j204c_tx_avs_readdata[31:0] signal must be the same if both signals are present. |
j204c_tx_avs_read | 1 |
Input |
This signal is asserted to indicate a read transfer. This is an active high signal and requires the j204c_tx_avs_readdata[31:0] signal to be in use. |
j204c_tx_avs_write | 1 |
Input |
This signal is asserted to indicate a write transfer. This is an active high signal and requires the j204c_tx_avs_writedata[31:0] signal to be in use. |
j204c_tx_avs_readdata | 32 |
Output |
32-bit data driven from the Avalon® memory-mapped slave to master in response to a read transfer. |
j204c_tx_avs_waitrequest | 1 |
Output |
This signal is asserted by the Avalon® memory-mapped slave to indicate that it is unable to respond to a read or write request. The JESD204C Intel® FPGA IP ties this signal to 0 to return the data in the access cycle. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Avalon® Streaming Interface (Data Channel) | |||
j204c_tx_avst_data | M*S*WIDTH_MULP*N |
Input |
The minimum data width = M*S*N. Indicates the converter samples that will be processed by TL. The data format is big endian. If L=1 and M*S*WIDTH_MULP*N=128, the first octet is located at bit[127:120], second octet at bit[119:112], and the last octet at bit[7:0]. If more than one lane is instantiated, lane 0 data is always located in the upper M*S*WIDTH_MULP*N bit data lane, followed by the next lane, with the first octet position for lane 0 is at MSB. |
j204c_tx_avst_control | M*S*WIDTH_MULP*CS | Input |
Control bits to be inserted as part of CS parameter. |
j204c_tx_avst_valid | 1 |
Input |
Indicates whether the data from the application layer is valid or invalid. The Avalon® streaming sink interface in the TX core cannot be backpressured and assumes that the data is always valid on every cycle when the j204c_tx_avst_ready signal is asserted.
|
j204c_tx_avst_ready | 1 |
Output |
Indicates that the Avalon® streaming sink interface in the TX core is ready to accept data. The Avalon® streaming sink interface asserts this signal on the JESD204C transport state of USER_DATA phase. The ready latency is 0. |
j204c_tx_frame_ready | 1 |
Output |
Indicates that the link layer is ready to accept data. The link layer asserts this signal on a predetermined time before the assertion of the j204c_tx_avst_ready signal. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Command (Command Channel) | |||
j204c_tx_cmd_data | L*n |
Input |
Indicates a 6/18-bit user command (per lane) at txlink_clk clock rate. The data format is big endian. If more than one lane is instantiated, lane 0 data is always located at the upper 18 bits or 6 bits of data. Lane L is located at bit[17:0] or bit[5:0], with the first command bit position for lane L at bit[17] or bit[5].
Note: n=6 for CRC-12 operation and n =18 for standalone command channel
|
j204c_tx_cmd_valid | 1 |
Input |
Indicates whether the command from the application layer is valid or invalid. The Avalon® streaming sink interface in the TX core cannot be backpressured and assumes that data is always valid on every cycle when the j204c_tx_cmd_ready signal is asserted.
|
j204c_tx_cmd_ready | 1 |
Output |
Indicates that the Avalon® streaming sink interface in the TX core is ready to accept command. The Avalon® streaming sink interface asserts this signal on the JESD204C link/transport state of USER_DATA phase. The ready latency is 0. |
Signal |
Width |
Direction |
Description |
JESD204C Interface | |||
j204c_tx_sysref | 1 |
Input |
SYSREF signal for JESD204C Subclass 1 implementation. For Subclass 0 mode, tie-off this signal to 0. |
j204c_tx_somb | 1 |
Output |
Start of multiblock. |
j204c_tx_soemb | 1 |
Output |
Start of extended multiblock. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC CSR | |||
j204c_tx_csr_l | 4 |
Output |
Indicates the number of active lanes for the link. The transport layer can use this signal as a compile-time parameter. |
j204c_tx_csr_f | 8 |
Output |
Indicates the number of octets per frame. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_m | 8 |
Output |
Indicates the number of converters for the link. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_cs | 2 |
Output |
Indicates the number of control bits per sample. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_n | 5 |
Output |
Indicates the converter resolution. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_np | 5 |
Output |
Indicates the total number of bits per sample. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_s | 5 |
Output |
Indicates the number of samples per converter per frame cycle. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_hd | 1 |
Output |
Indicates the high density data format. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_cf | 5 |
Output |
Indicates the number of control words per frame clock period per link. The transport layer uses this signal as a compile-time parameter. |
j204c_tx_csr_e | 8 | Output |
LEMC period |
j204c_tx_csr_testmode | 4 |
Output |
0000: No test mode 0001: Scrambler disabled Other values are reserved. |
Signal |
Width |
Direction |
Description |
JESD204C TX MAC Out-of-band (OOB) | |||
j204c_tx_int | 1 |
Output |
Interrupt pin for the JESD204C Intel® FPGA IP. Interrupt is asserted when any error or synchronization request is detected. Configure the tx_err_enable register to set the type of error that can trigger an interrupt. |
j204c_tx2rx_lbdata | L*132 | Output |
Output as 132-bit width data before the TX gearbox to connect to the RX core (same signal name) for 2-block loopback function. If L>0, LSB of this bus is mapped to lane 0. MSB is mapped to lane L–1. |
txphy_data | 64*L | Output | TX PHY parallel data. |
tx_fifo_full | L | Input | Indicates the TX core interface FIFO is full. |