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R8C/15 데이터시트(PDF) 221 Page - Renesas Technology Corp

부품명 R8C/15
상세설명  16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / R8C/Tiny SERIES
PDF  277 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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R8C/14 Group, R8C/15 Group
18. Flash Memory Version
Rev.2.10
Jan 19, 2006
Page 209 of 253
REJ09B0164-0210
18.4.4
Status Register
The status register indicates the operating status of the flash memory and whether an erasing or
programming operation completes normally or in error. Status of the status register can be read by
the FMR00, FMR06, and FMR07 bits in the FMR0 register.
Table 18.5 lists the Status Register.
In EW0 mode, the status register can be read in the following cases:
• When a given address in the user ROM area is read after writing the read status register
command
• When a given address in the user ROM area is read after executing the program or block erase
command but before executing the read array command.
18.4.4.1
Sequencer Status (SR7 and FMR00 Bits)
The sequencer status indicates operating status of the flash memory. SR7 = 0 (busy) during auto
programming and auto erasing, and is set to “1” (ready) at the same time the operation completes.
18.4.4.2
Erase Status (SR5 and FMR07 Bits)
Refer to 18.4.5 Full Status Check.
18.4.4.3
Program Status (SR4 and FMR06 Bits)
Refer to 18.4.5 Full Status Check.
• D0 to D7: Indicates the data bus which is read when the read status register command is executed.
• The FMR07 (SR5) to FMR06 bits (SR4) are set to “0” by executing the clear status register command.
• When the FMR07 bit (SR5) or FMR06 bit (SR4) is set to “1”, the program and block erase command
cannot be accepted.
Table 18.5
Status Register
Status
Register
Bit
FMR0
Register
Bit
Status Name
Contents
Value
after
Reset
“0”
“1”
SR0 (D0)
−
Reserved
−−
−
SR1 (D1)
−
Reserved
−−
−
SR2 (D2)
−
Reserved
−−
−
SR3 (D3)
−
Reserved
−−
−
SR4 (D4)
FMR06
Program status Completed
normally
Error
0
SR5 (D5)
FMR07
Erase status
Completed
normally
Error
0
SR6 (D6)
−
Reserved
−−
−
SR7 (D7)
FMR00
Sequencer
status
Busy
Ready
0



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