POWER SAVING FUNCTIONS
16.1 Overview
This chapter explains the functions to save the power consumption of the microcomputer and the total
system including the microcomputer.
16.1 Overview
Table 16.1.1 lists the overview of the power saving functions. Each of these functions saves the power
consumption of the total system. The registers related to the power saving functions are explained in the
following.
Table 16.1.1 Overview of power saving functions
Item
Function
Reference
In the wait mode, operating clocks for the internal peripheral
devices and fsys can be inactive.
Inactivity of system clock in
wait mode
CHAPTER 15. STOP
AND WAIT MODES
CHAPTER 4. CLOCK
GENERATING CIRCUIT,
Section 15.3 Stop mode
CHAPTER 12. A-D CONVERTER
When a stable clock externally generated is used, the drive
circuit for oscillation between pins XIN and XOUT can be stopped.
(The output level at pin XOUT is fixed to “H.”)
The VREF input can be disconnected when the A-D converter
is not used
Stop of oscillation circuit
Pin VREF disconnection
7905 Group User’s Manual Rev.1.0
16-2
RENESAS [ RENESAS TECHNOLOGY CORP ]
