Overview
Design & Development
Software & Tools
Sample Code
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

Support
Support Communities
Support Communities
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H8S/2398 and FDT
Hi everyone, Currently, I using FDT v4.09 to program for H8S/2398 through RS232-C protocol. However, I don't know the connection between my computer's COM port and H8S/2398. I mean which pin of H8S/2398 that I need to connect to ? Is ...
Nov 21, 2019 -
H8S/2398 64F2398F20V boot failure.
Hi everyone, I read with some dismay the link someone posted about fake components including H8 300 processors. I've been bringing processors in from China - i have to because unfortunately i live in a 3rd world country and local suppliers can't / won't help with this kind ...
Jun 27, 2015
FAQs
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H8S Family: Why is it an advantage to have individual vectors for each peripheral ?
"Speed of operation. The CPU does not have to consume time by interrogating a status register to determine which interrupt has been generated."
Mar 23, 2009 -
How do I calcuate the case temperature of an IC?
"The case temperature could be calculated with following formulas: 1: Tj = Ta + Theta-ja x Q 2: Tj = Tc + Theta-jc x Q ==> 3: Tc = Ta + Theta-ja x Q - Theta-jc x Q Ta = ambient temperature Tc = case temperature Tj = junction temperature Theta-ja = thermal resistance junction-ambient ...
Jul 6, 2021 -
Writing on-chip FLASH through kernel; can't be read on FDT in BOOT MODE.
"Even if youve properly written the FLASH it will be automatically cleared as soon as you put the device in Boot mode. You have to remain in USER MODE without passing trough BOOT MODE if you want to avoid your FLASH to be cleared."
Mar 23, 2009