![Hitachi H8/3152 Hardware Manual Download Page 105](http://html.mh-extra.com/html/hitachi/h8-3152/h8-3152_hardware-manual_140481105.webp)
105
Section 11 Security
11.1
Overview
The H8/3150 series has the following security functions. The high-frequency, high-voltage, low-
frequency, and low-voltage errors are detected outside the range of the operating frequency and
power voltage. When an error is detected, all the internal functions are reset. To recover from the
error detection state, enter the reset state by inputting a low level to the
RES
pin.
•
High frequency detector
•
High voltage detector
•
Low frequency detector
•
Low voltage detector
•
Illegal access detector
11.2
Error Detection in Sleep Mode
Table 11.1 shows the error detection in sleep mode.
Table 11.1
Error Detection in Sleep Mode
Security Function
Error Detection in Sleep Mode
High frequency detector
Does not detect a high frequency on the CLK line.
High voltage detector
Does not detect a high voltage.
Low frequency detector
Does not detect a low frequency on the CLK line.
Low voltage detector
Does not detect a low voltage.
Illegal access detector
No illegal access occurs because the CPU stops in sleep mode.