HD64F3437TF16 Datasheet, PDF (7/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

User's Manuals on the H8/3437 Series:
Manual Title
H8/3437 Series Hardware Manual
H8/300 Series Programming Manual
ADE No.
This manual
ADE-602-025
Users manuals for development tools:
Manual Title
C/C++ Compiler, Assembler, Optimized Linkage Editor User's Manual
Simulator Debugger Users Manual
Hitachi Debugging Interface Users Manual
Hitachi Embedded Workshop Users Manual
H8S, H8/300 Series Hitachi Embedded Workshop, Hitachi Debugging
Interface Users Manual
ADE No.
ADE-702-247
ADE-702-282
ADE-702-161
ADE-702-201
ADE-702-231