M16C62N Datasheet, PDF (192/213 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Mitsubishi microcomputers
M16C / 62N Group (80-pin)
Appendix Standard Serial I/O Mode 1 (Flash Memory Version) ^{SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER}
Status Register (SRD)
The status register indicates operating status of the flash memory and status such as whether an erase
operation or a program ended successfully or in error. It can be read by writing the read status register
command (7016). Also, the status register is cleared by writing the clear status register command (5016).
Table 1.32.2 gives the definition of each status register bit. After clearing the reset, the status register
outputs “8016”.
Table 1.32.2. Status register (SRD)
SRD0 bits
SR7 (bit7)
SR6 (bit6)
SR5 (bit5)
SR4 (bit4)
SR3 (bit3)
SR2 (bit2)
SR1 (bit1)
SR0 (bit0)
Status name
Sequencer status
Reserved
Erase status
Program status
Reserved
Reserved
Reserved
Reserved
Definition
“1”
“0”
Ready
Busy
-
-
Terminated in error Terminated normally
Terminated in error Terminated normally
-
-
-
-
-
-
-
-
Sequencer status (SR7)
After power-on, the sequencer status is set to 1(ready).
The sequencer status indicates the operating status of the device. This status bit is set to “0” (busy)
during write or erase operation and is set to 1 upon completion of these operations.
Erase Status (SR5)
The erase status reports the operating status of the auto erase operation. If an erase error occurs, it is
set to “1”. When the erase status is cleared, it is set to “0”.
Program Status (SR4)
The program status reports the operating status of the auto write operation. If a write error occurs, it is
set to “1”. When the program status is cleared, it is set to “0”.
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