130 USB CDC (Serial) Device

130 : USB CDC (Serial) Device

Design render

How it works

A USB CDC to UART bridge, based on tinyfpga_bx_usbserial.

How to test

  1. Connect usb_p and usb_n pins to D+ / D- USB pins either through 68 ohm resistors or directly (the resistors are recommended, but not mandatory).
  2. Connect a 1.5k ohm resistor between dp_pu_o and usb_p (D+).
  3. Connect the RX and TX pins to a UART device or to a logic analyzer.
  4. Set the clock frequency to 48 MHz.

The device should appear as a serial port on your computer, with vendor_id=1209 and product_id=5454 (https://pid.codes/1209/5454/). The baud rate for the UART interface is hardcoded at 115200.

External Hardware

USB breakout board, 1.5k ohm resistor

IO

#InputOutputBidirectional
0usb_p
1usb_n
2dp_pu_o
3RX
4TX
5
6
7configured

Chip location

Controller Mux Mux Mux Mux Mux Mux Mux Mux Mux Mux Mux Mux Mux Mux Mux tt_um_chip_rom (Chip ROM) tt_um_factory_test (Tiny Tapeout Factory Test) tt_um_htfab_asicle2 (Asicle v2) tt_um_urish_simon (Simon Says memory game) tt_um_dlmiles_ringosc_5inv (Ring Oscillator (5 inverter)) tt_um_rejunity_vga_logo (VGA Tiny Logo) tt_um_rejunity_sn76489 (Classic 8-bit era Programmable Sound Generator SN76489) tt_um_wokwi_392873974467527681 (PILIPINAS_IC) tt_um_wokwi_442081253563458561 (PRISM 8 with TinySnake) tt_um_waferspace_vga_screensaver (Wafer.space Logo VGA Screensaver) tt_um_rejunity_z80 (Zilog Z80) tt_um_MichaelBell_tinyQV (TinyQV Risc-V SoC) tt_um_calonso88_spi_i2c_reg_bank (Register bank accessible through SPI and I2C) tt_um_htfab_caterpillar (Simon's Caterpillar) tt_um_gf0p2_faust_top (Silly-Faust) tt_um_htfab_cells (Cell mux) tt_um_zedtc1_top (Zedulo TestChip1) tt_um_essen (2x2 MAC Systolic array with DFT) tt_um_BLE_RX (SCµM-BLE-RX) tt_um_kianV_rv32ima_uLinux_SoC (KianV uLinux SoC) tt_um_schoeberl_wildcat (Wildcat RISC-V) tt_um_vga_clock (VGA clock) tt_um_digital_clock_example (7-Segment Digital Desk Clock) tt_um_rejunity_vga_test01 (VGA Drop (audio/visual demo)) tt_um_a1k0n_nyancat (VGA Nyan Cat) tt_um_proppy_megabytebeat (megabytebeat) tt_um_javibajocero_top (MarcoPolo) tt_um_kercrafter_leds_racer (LEDs Racer) tt_um_noritsuna_CAN_CTRL (CAN Controller for Rocket) tt_um_algofoogle_raybox_zero (raybox-zero TTGF0p2 edition) tt_um_flummer_ltc (Linear Timecode (LTC) generator) tt_um_dlmiles_bad_synchronizer (Example of Bad Synchronizer) tt_um_multi_bit_puf_wrapper (One Bit PUF) tt_um_algofoogle_vgaringosc (Ring osc on VGA) tt_um_lisa (LISA 8-Bit Microcontroller) tt_um_mmorri22_lockpick_game (Notre Dame - Lockpick Game TT Example) tt_um_simple_riscv (Simple RISC-V) tt_um_mmorri22_cse_30342 (Notre Dame - CSE 30342 - DIC - Advanced FSM Final Project Example) tt_um_zacky1972_PVTMonitorSuite (PVTMonitorSuite) tt_um_SophusAndreassen_dogbattle (Dog Battle Game) tt_um_frequency_counter (Frequency Counter SSD1306 OLED) tt_um_wokwi_445338187869298689 (WokwiPWM) tt_um_kbeckmann_flame (Flame demo) tt_um_2048_vga_game (2048 sliding tile puzzle game (VGA)) tt_um_spi_cpu_top (Super-Simple-SPI-CPU) tt_um_urish_usb_cdc (USB CDC (Serial) Device) tt_um_htfab_vga_tester (Video mode tester) tt_um_dlmiles_ddr_throughput_test (DDR throughput and flop aperature test) tt_um_dlmiles_loopback (GF180MCU loopback tile with input skew measurement) tt_um_thezoq2_quickscope (Quickscope) tt_um_MATTHIAS_M_PAL_TOP_WRAPPER (easy PAL) tt_um_htfab_rotfpga2 (ROTFPGA v2)