Section 11 Security; Overview; Error Detection In Sleep Mode - Hitachi H8/3152 Hardware Manual

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
High frequency detector
High voltage detector
Low frequency detector
Low voltage detector
Illegal access detector

Section 11 Security

Error Detection in Sleep Mode
Does not detect a high frequency on the CLK line.
Does not detect a high voltage.
Does not detect a low frequency on the CLK line.
Does not detect a low voltage.
No illegal access occurs because the CPU stops in sleep mode.
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