====== Hardware Revisions ======

===== CPi-C070WR4C =====

==== v2.1 ====
    * Improved the surge protection circuit on the serial ports.

==== v2.0 ====
    * Replaced SMSC9512 10/100 Ethernet with CM4's 1Gbps internal Ethernet.  Please remove the ''dtoverlay=noeth'' setting in the ///boot/config.txt// file.
    * Replaced 9514 USB/Ethernet IC with USB hub IC
    * OS 20230227 or later is recommended.

==== v1.0 ====
    * Initial release


===== CPi-A070WR, CPi-A102WR, CPi-S070WR =====
==== v2.8 ====
  * Improved the surge protection circuit on the serial ports.
==== v2.7 ====
    * Added support for CM4S modules

==== v2.6 ====
    * Added USB device protection circuit

==== v2.5 ====
    * Voltage regulator component change

==== v2.4 ====
    * PCB layout (solder mask) improvements.
    * Some manually applied changes in v2.3 are now permanent and applied during fabrication
    * [CPi-A070xx] Beginning in June 2020, modifications to improve EMI performance
    * [CPi-A102xx] Beginning in June 2021, modifications to improve EMI performance

==== v2.3 ====
    * Improved I2C circuit
    * Improved SD Card support
    * Most recent production has a 4th USB port for programming Compute Modules with an eMMC
    * Beginning in October 2020, production began populating the RS-485 port with 1kΩ bias resistors.

==== v2.2 ====
    * COM1 has been changed from RS-232 to RS-485
    * Use [[comfilepi:raspbian:index#cpi-a070wr_cpi-a102wr|OS 20170828]] or later.

==== v2.1 ====
    * RTC IC is populated.
    * Added [[comfilepi:controlling_the_lcd_backlight:index|backlight brightness control feature]] (GPIO31)
    * Use [[comfilepi:raspbian:index#cpi-a070wr_cpi-a102wr|OS 20170828]] or later.

==== v2.0 (S/N : A01001-17-7-11 ~ A01001-17-11-91, A01003-17-7-1 ~ A01003-17-10-26) ====
    * Added Enable/Disable function for level shifter IC (TXS0108E). Needs bt-blob.bin file at /boot folder.
    * Populated R33 for [[comfilepi:controlling_the_lcd_backlight:index|backlght On/Off feature]] (GPIO34).
    * Added RTC cirucuit.  However, the RTC IC is not populated.
    * Use [[comfilepi:raspbian:index#cpi-a070wr_cpi-a102wr|OS 20170703]] or later.

==== v1.5 (S/N : A01001-17-6-1 ~ A01001-17-7-10) ====
    * Unused USB Port is removed.

====  v1.4 (S/N : A01001-17-5-1 ~ A01001-17-5-17) ====
    * Initial release



===== CPi-A101WR, CPi-S101WR =====



==== v1.5 ====
  * Improved the surge protection circuit on the serial ports.

==== v1.4 ====
  * Added support for CM4S modules

==== v1.3 ====
    * Added USB device protection circuit

==== v1.2 ====
    * Voltage regulator component change

==== v1.1 ====
    * Improved I2C circuit

==== v1.0 ====
    * Initial Release




===== CPi-A150WR, CPi-S150WR =====

==== v1.6 ====
    * Added support for CM4S modules

==== v1.5 ====
    * Voltage regulator component change

==== v1.4 ====
    * Improved I2C circuit

==== v1.3 ====
    * Initial release

===== CPi-A070WT =====



==== v1.3 ====
    * Voltage regulator component change

==== v1.2 ====
    * Modifications to improve EMI performance

==== v1.1 ====
    * Changes to support eMMC
    * Improved I2C circuit.

==== v1.0 ====
    * Initial Release


[[comfilepi:index|ComfilePi - Industrial Raspberry Pi Panel PC]]