r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1087
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r4f2426
Manufacturer Part Number
r4f2426
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2426.pdf
(1302 pages)
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21.6
The status register indicates the state of flash memory operation and whether erasure or
programming has ended successfully or with an error. The status register contents can be read
through the FMRDY, FMPRSF, and FMERSF bits in FLMSTR.
Table 21.6 shows the status register.
In the EW0 mode, the status register can be read with the following timing.
•
•
Table 21.6 Status Register
[Legend]
D0 to D7: Data bus from which the bit is read when a read status register command is issued.
Note: The FMERSF (SR5) and FMPRSF (SR4) bits are cleared to 0 by a clear status register
Bits in Status
Register
SR0 (D0)
SR1 (D1)
SR2 (D2)
SR3 (D3)
SR4 (D4)
SR5 (D5)
SR6 (D6)
SR7 (D7)
data flash is read
issued and then an even address in the user ROM or data flash is read before a read array
command is issued
When a read status register command is issued and then an even address in the user ROM or
When a program command, a block erase command, or a block blank check command is
command.
When the FMERSF (SR5) or FMPRSF (SR4) bit is 1, the program, block erase, and block
blank check commands are not accepted.
Status Register
Bits in
FMLSTR
FMPRSF
FMERSF
FMRDY
Status Name
Reserved
Reserved
Reserved
Reserved
Programming
status
Erase status
Reserved
Sequencer status Busy
0
Completed
successfully
Completed
successfully
Rev. 1.00 Sep. 19, 2008 Page 1059 of 1270
Status
1
Ended with
error
Ended with
error
Ready
Section 21 Flash Memory
REJ09B0466-0100
Value after
Reset
0
0
1
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