Flash Memory Status Register (Fsr) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 28 256-KBIT FLASH MEMORY
28.3.1

Flash Memory Status Register (FSR)

Figure 28.3-2 lists the functions of the flash memory status register (FSR).
Flash Memory Status Register (FSR)
Address bit7 bit6
0072 - -
H
R0/WX R0/WX
R/W : Readable/writable (Read value is the same as write value)
R(RM1),W : Readable/writable (Read value is different from write value, "1" is read by read-modify-write instruction)
R/WX : Read only (Readable, writing has no effect on operation)
R/W0 : Reserved bit (Write value is "0", read value is the same as write value)
R0/WX : Undefined bit (Read value is "0", writing has no effect on operation)
X : Indeterminate
: Initial value
524
Figure 28.3-2 Flash Memory Status Register (FSR)
bit5 bit4 bit3 bit2
Re-
RDY IRQEN WRE
RDYIRQ
served
R(RM1),W R/WX R/W0 R/W
bit1 bit0 Initial value
Re-
000X0000
B
served
R/W R/W0
Re-
served
0
Be sure to set the bit to "0".
Flash memory program/erase enable bit
WRE
0 Disables flash memory area programming/erasing.
1
Enables flash memory area programming/erasing.
Flash memory program/erase interrupt enable bit
IRQEN
0 Disables interrupts upon completion of programming/erasing.
1
Enables interrupts upon completion of programming/erasing.
Re-
served
0
Be sure to set the bit to "0".
RDY Flash memory program/erase status bit
0
Data is being programmed/erased (not ready to program/erase next data).
1
Data has been programmed/erased (ready to program/erase next data).
Flash memory operation flag bit
RDYIRQ
Read
Programming/erasing is being performed.
0
1 Programming/erasing has been completed.
The value read is always "0". Writing has no effect on the operation.
The value read is always "0". Writing has no effect on the operation.
Reserved bit
Reserved bit
Write
Clears this bit.
No effect.
Undefined bit
Undefined bit