h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 981

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

21C.14 Flash Memory and Power-Down States
In addition to its normal operating state, the flash memory has power-down states in which power
consumption is reduced by halting part or all of the internal power supply circuitry.
There are three flash memory operating states:
(1) Normal operating mode: The flash memory can be read and written to.
(2) Power-down mode: Part of the power supply circuitry is halted, and the flash memory can be
(3) Standby mode: All flash memory circuits are halted, and the flash memory cannot be read or
States (2) and (3) are flash memory power-down states. Table 21C-26 shows the correspondence
between the operating states of the LSI and the flash memory.
Table 21C-26
LSI Operating State
High-speed mode
Medium-speed mode
Sleep mode
Subactive mode
Subsleep mode
Watch mode
Software standby mode
Hardware standby mode
read when the LSI is operating on the subclock.
written to.
Flash Memory Operating States
Flash Memory Operating State
Normal mode (read/write)
When PDWND = 0: Power-down mode (read-only)
When PDWND = 1: Normal mode (read-only)
Standby mode
Rev. 6.00 Feb 22, 2005 page 921 of 1484
Section 21C ROM (H8S/2635 Group)
REJ09B0103-0600