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Ixiasoft
5.9.7. RS-232 UART (HPS)
The development board supports two UART interfaces, the HPS debug UART and the FPGA debug UART interface. The HPS debug UART is connected to a mini-USB connector (J10) using a FT232RQ-REEL USB-to-UART bridge. The maximum supported rate for this interface is 1 Mbps. The FPGA debug UART is connected to the DB9 connector (J25) using a MAX3221 UART PHY. Board reference D11 and D12 are the HPS debug UART LEDs that illuminate to indicate TX and RX activity.
FPGA Pin Assignment | Shared I/O Bit | Schematic Signal Name | Description |
---|---|---|---|
J18 | GPIO1_IO6 | UARTA_TX | HPS debug UART port 1 TX |
J19 | GPIO1_IO7 | UARTA_RX | HPS debug UART PORT 1 RX |
AV22 | - | CVP_CONFDONE | HPS UART0 TX after FPGA configuration |
AU21 | - | CRCERROR | HPS UART0 RX after FPGA configuration |