h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 593
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
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19.12
In user mode, the flash memory will operate in either of the following states:
• Normal operating mode
• Power-down state
• Standby mode
Table 19.6 shows the correspondence between the operating modes of this LSI and the flash
memory. When the flash memory returns to its normal operating state from standby mode, a
period to stabilize the power supply circuits that were stopped is needed. When the flash memory
returns to its normal operating state, bits STS2 to STS0 in SBYCR must be set to provide a wait
time of at least 100 µs, even when the external clock is being used.
Table 19.6 Flash Memory Operating States
LSI Operating State
Active mode
Sleep mode
Watch mode
Standby mode
Sub-active mode
Sub-sleep mode
The flash memory can be read and written to at high speed.
The flash memory can be read when part of the power circuit is halted and the LSI operates by
subclocks.
All flash memory circuits are halted.
Power-Down States for Flash Memory
Flash Memory Operating State
Normal operating mode
Normal operating mode
Standby mode
PDWND = 0: Power-down mode (read only)
PDWND = 1: Normal operating mode (read only)
Rev. 2.00 Dec. 05, 2005 Page 555 of 724
REJ09B0200-0200
Section 19 ROM
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