r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1195

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 25 Power-Down Modes
Section 25 Power-Down Modes
In addition to the normal program execution state, this LSI has power-down modes in which
operation of the CPU and oscillator is halted and power consumption is reduced. Low-power
operation can be achieved by individually controlling the CPU, on-chip peripheral modules, and
so on.
This LSI’s operating modes are high-speed mode and six power down modes:
• Clock division mode
• Sleep mode
• Module stop function
• All module clocks stop mode
• Software standby mode
• Hardware standby mode
Sleep mode is a CPU state, clock division mode is an on-chip peripheral function (including bus
masters and the CPU) state, and module stop function is an on-chip peripheral function (including
bus masters other than the CPU) state. A combination of these modes can be set.
After a reset, this LSI is in high-speed mode.
Table 25.1 shows the internal states of this LSI in each mode. Figure 25.1 shows the mode
transition diagram.
Rev. 1.00 Sep. 19, 2008 Page 1165 of 1342
REJ09B0467-0100