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Note on the Recommended Power-On Sequence

Product name
TOSHIBA Microcontrollers TX19 Family TX19 Series
  • TMP1942CYU
  • TMP1942CZU
  • TMP1942FDU
  • TMP1942CZXB
  • TMP1942FDXB

Dear Customer

With regard to the TX19 Family microcontrollers listed above, please be advised that at power-on the pull-up resistors and others attached to the I/O ports of the 5V supply domain become unstable until the core power supply (3.0V) has stabilized. We will add a note on the recommended power-on sequence, as described below, in the technical datasheet.

Note on using

At power-on, the pull-up resistors and input& output buffers attached to the I/O ports of the 5V supply domain may become unstable or a through current may pass through the port until the core power supply (3.0V) has stabilized. 

Note To Be Added To Technical Datash

Recommended power-on sequence:
In powering up this device, it is recommended that the core power supply (3.0V) be turned on first.


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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.