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The Trenz Electronic TE0790 is an universal USB2.0 to JTAG, UART and GPIO adapter based on the FTDI FT2232H USB2 IC. The adapter board converts signals from USB2.0 to standard serial or parallel interfaces of Embedded Systems like JTAG, SPI, I²C and UART.
The adapter is equipped with a programmable System Controller CPLD provided by Lattice Semiconductor LCMXO2-256HC (MachXO2 Product Family) to control the signals of the configured interfaces. The data stream of the USB2.0 port can be also converted to 8 independent GPIO's or used as FIFO.
Refer to http://trenz.org/te0790-info for the current online version documentation.
Important notice on TE0790 variants equipped with an AMD Programmer license:
System Controller (LCMXO2-256HC), U1
Oscillator 12 MHz, U6
LED green (Power), D1
LED red (User), D4
LED red (UART RX), D3
LED red (UART TX), D2
Push button, S1
4x DIP switches, S2
Mini USB Type B Connector, J4
Pin Header, J2
Storage device | Content | Notes |
|---|---|---|
EEPROM, U10 | FTDI configuration. AMD Programmer License. | Adapter variants for use with AMD Development Tools store the Programmer License inside this EEPROM. Do not overwrite! Refer to TE0790 Identification for variant identification. |
| System Controller, U1 | Firmware | Visit TE0790 CPLD Firmware for further information. |
| Connector Type | Designator | Interface | IO CNT | Notes |
|---|---|---|---|---|
Mini USB Type B | J4 | USB 2.0 | 2 | |
| Pin Header 2.54 mm | J2 | IO | 8 |
| Test Point | Signal | Notes |
|---|---|---|
| - | - | - |
| Chip/Interface | Designator | Connected To | Notes |
|---|---|---|---|
FTDI | U4 |
| |
System Controller | U1 |
| Visit TE0790 CPLD Firmware for further information. |
EEPROM | U10 |
| Adapter variants for use with AMD Development Tools store the Programmer License inside this EEPROM. Do not overwrite! Refer to TE0790 Identification for variant identification. |
Oscillator 12MHz | U6 |
|
Visit TE0790 CPLD Firmware for further information.
| Signal Name | Connector.Pin | Direction1) | Description |
|---|---|---|---|
| PB | S1 | IN | Visit TE0790 CPLD Firmware for further information. |
1) Direction:
Signal Name | Connector.Pin / DIP switch name | Description | Direction1) | DIP setting | |||
|---|---|---|---|---|---|---|---|
| ON | OFF | ||||||
Configuration | JTAGEN (JTAG enable) | S2.1 / S2A | Select JTAG connection between SC or IO pin header. | IN | JTAG to Pin Header J2 | JTAG to SC | |
DISEE (Disengage EEPROM) | S2.2 / S2B | FTDI EEPROM visibility. Must always be in OFF state. | - | FTDI EEPROM not accessible. | FTDI can access EEPROM/load configuration. | ||
Power | VIO (Variable IO power) | S2.3 / S2C | Connect the SC Bank 2 IO voltage to LDO_3V3 or 3V3 net. | INOUT | Power VIO from 3.3V. | Power VIO from pin header J2. | |
LDO_3V3 | S2.4 / S2D | Power the adapter via USB (J4) or pin header J2. | INOUT | Power 3.3V from USB. | Power 3.3V from pin header J2. | ||
1) Direction:
See chapter "Recommended Power up Sequencing" expandable "Diagramm of the different Power Supply paths" for further information.
| Power Rail Name/ Schematic Name | Connector.Pin | Direction1) | Notes |
|---|---|---|---|
| Vbus | J4.1 | IN | |
| 3V3 | J2.5 | IN | |
| VIO | J2.6 | IN |
1) Direction:
| Use Case Description and Diagram | DIP S2 Setting | Direction1) | |||
|---|---|---|---|---|---|
| J4.1 / Vbus / LDO_3V3 | J2.5 / 3.3V | J2.6 / VIO | |||
USB powers the Adapter, 3.3V and VIO. 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
| S2C = ON S2D = ON | IN | OUT | OUT | |
3.3V powers the adapter and VIO. 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
| S2C = ON S2D = OFF | Not connected | IN | OUT | |
USB powers the Adapter and 3.3V, VIO powered separately. 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
| S2C = OFF S2D = ON | IN | OUT | IN | |
3.3V powers the Adapter, VIO powered separately. 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
| S2C = OFF S2D = OFF | Not connected | IN | IN | |
Adapter powered via VIO. 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
| S2C = ON S2D = OFF | Not connected | OUT | IN | |
1) Direction:
| Sequence | Net name | Recommended Voltage Range | Pull-up/down | Description | Notes |
|---|---|---|---|---|---|
| 0 | - | - | - | Configuration signal setup. | |
| 1 | - | - | - | Assembly adapter into system. | |
| 2 | - | - | - | Power Supply |
| Power Rail Name/ Schematic Name | Description | Min | Max | Unit |
|---|---|---|---|---|
| Vbus | Supply voltage via USB jack J4. | 0 | 5.5 | V |
| 3.3V | Supply voltage via J2 Pin Header. | -0.3 | 3.75 | V |
| VIO | Supply for System Controller IO Bank 2. | -0.5 | 3.75 | V |
*) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these
or any other conditions beyond those indicated under Recommended Operating Condition. Exposure to absolute-maximum rated conditions for extended periods may affect device reliability.
This TRM is generic for all variants. Temperature range can be different depending on the assembly version. Voltage range is mostly the same during variants (exceptions are possible, depending on custom request).
The adapter components are capable of being operated at industrial-grade temperatures, which cover at least the range of -40 °C to +85 °C.
Operating temperature range depends also on customer design and cooling solution.
| Power Rail Name/ Schematic Name | Description | Min | Max | Units |
|---|---|---|---|---|
| Vbus | Supply voltage via USB jack J4. | 4.75 | 5.25 | V |
| 3V3 | Supply voltage via J2 Pin Header. | 3.15 | 3.45 | V |
| VIO | Supply Voltage for System Controller IO Bank 2. | 2.97 | 3.60 | V |
PCB thickness: 1.6 mm +/- 10 %.

| Trenz shop TE0790 overview page* | |
|---|---|
| English page | German page |
*) The adapter is available with or without AMD Programmer License. Refer to TE0790 Identification for variant identification.
The hardware revision number is located on the PCB next to the adapter identifier, separated by a dash.

Date | Revision | Contributors | Description |
|---|---|---|---|
| |||
2025-05-13 | v.47 | Kilian Jahn |
|
2019-10-30 | v.38 | John Hartfiel |
|
2018-01-18 | v.37 | John Hartfiel |
|
| 2017-11-16 | v.34 | Ali Naseri |
|
2017-10-26 | v.27 | John Hartfiel |
|
| 2017-10-19 | v.26 | Ali Naseri |
|
| -- | all |
|
Table 15: Document change history.
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Users of electrical and electronic equipment in private households are required not to dispose of waste electrical and electronic equipment as unsorted municipal waste and to collect such waste electrical and electronic equipment separately. By the 13 August 2005, Member States shall have ensured that systems are set up allowing final holders and distributors to return waste electrical and electronic equipment at least free of charge. Member States shall ensure the availability and accessibility of the necessary collection facilities. Separate collection is the precondition to ensure specific treatment and recycling of waste electrical and electronic equipment and is necessary to achieve the chosen level of protection of human health and the environment in the European Union. Consumers have to actively contribute to the success of such collection and the return of waste electrical and electronic equipment. Presence of hazardous substances in electrical and electronic equipment results in potential effects on the environment and human health. The symbol consisting of the crossed-out wheeled bin indicates separate collection for waste electrical and electronic equipment.
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