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CompanyTrenz Electronic GmbH
PCN NumberPCN-2020061620200827
TitleTE0820TE0727-03 01 to TE0820TE0727-04 02 Hardware Revision Change
SubjectHardware Revision Change
Issue Date


Products Affected

This change affects all Trenz Electronic TE0820 Electronic TE0727 SoMs of revision 0301: TE0820-0301-*.

Affected Product





fixed I2C connection, added I2C MUX (U16; PCA9540BGD,125)

Type: Schematic change

Reason: Support different DDR4 chips.

Impact: Support of B-die DDR4 Industrial grade chips


Both I2C was connected to I2C1 on MIO

Impact: Now supported both I2C: CSI & ID(on PiHAT connector)

#2 Added optional pin-header connector for select JTAG boot mode

Type: Schematic change

Reason: Former chip not recommended for new designs.

Impact: None. With R93 and changed value of C62 the circuit behaves as before.


Requres special workaround to write Flash in non JTAG mode (7Series Zynq)

Impact: Sometimes not loaded

#3 Added 2x user LEDs

Type: Schematic change

Reason: Datasheet recommendation. Expansion of functionality

Impact: None.



Changed obsolete DDR3 chip

Type: Schematic BOM change

Reason: Recommended by Xilinx UG583 IS43TR16256AL-125KBLI became obsolete.

Impact: None.



Fixed wrong conection for CSI-2

Type: BOM Schematic change

Reason: Recommended by Xilinx DS925 v1.17

Impact: None.

#6 Fixed DDR4 connection (Alert)

Type: Schematic change

Reason: Alert signal was connected to VTT.

Impact: None. Alert signal connected to DDR_1V2.

#7 Added 3.3V signal to CPLD pin 5

Type: Schematic change

Reason: Request for power good signal at CPLD.

Impact: State of 3.3V rail can be evaluatet in CPLD Firmware.

#8 Added testpoints

Type: Schematic change

Reason: Testpoints needed for improved automatic testing.

Impact: More testpoints In J2 was swapped pin1 and pin22 (in schematic RaspberryPiZero was swapped pin1 and pin22)

Impact: In Rev01 was used another type connector. Now will be used at the same connector with Raspberry PiZero

#6 Changed C85/ C86 to 10uF

Type: BOM change

Reason: U13 has total capacitance limitation

Impact: Stable work of DCDC

#7 Added legal notices to Schematic

Type: Documentation change

Reason: Increase awarness of legal usage.

Impact: None.

#8 Set S/N to not fitted.

Type: BOM change

Reason: Part is end of life.

Impact: Track it pad no more available.

#9 LIB components update

Type: Schematic change

Reason: Improve production yield.

Impact: None.

Method of Identification

The revision number is printed on the top side of the PCB. DiagramborderfalsediagramNameRN_TE0820simpleViewerfalsewidth400linksautotbstyletopdiagramDisplayNamelboxfalsediagramWidth119revision1Image Added

Production Shipment Schedule

The new revison 04 02 is available from August 2020, after old Stock is gone. If you still need revision 03 01 please contact us.

Contact Information

If you have any questions related to this PCN, please contact Trenz Electronics Technical Support at


Any projected dates in this PCN are based on the most current product information at the time this PCN is being issued, but they may change due to unforeseen circumstances.  For the latest schedule and any other information, please contact your local Trenz Electronic sales office, technical support or local distributor.