M30622M4 MITSUBISHI [Mitsubishi Electric Semiconductor], M30622M4 Datasheet - Page 266

• Manufacturer Part Number: M30622M4
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Appendix Standard Serial I/O Mode (Flash Memory Version)
266
Table 1.31.2. Status register (SRD)
Status Register (SRD)
SRD0 bits
SR7 (bit7)
SR6 (bit6)
SR5 (bit5)
SR4 (bit4)
SR3 (bit3)
SR2 (bit2)
SR1 (bit1)
SR0 (bit0)
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 (70
Table 1.31.2 gives the definition of each status register bit. After clearing the reset, the status register
outputs “80
Write State Machine (WSM) Status (SR7)
Erase Status (SR5)
Program Status (SR4)
The write state machine (WSM) status indicates the operating status of the flash memory. When
power is turned on, “1” (ready) is set for it. The bit is set to “0” (busy) during an auto write or auto erase
operation, but it is set back to “1” when the operation ends.
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”.
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”.
16
”.
16
). Also, the status register is cleared by writing the clear status register command (50
Status name
Write state machine (WSM) status
Reserved
Erase status
Program status
Block status after program
Reserved
Reserved
Reserved
Terminated in error
Terminated in error
Terminated in error
Ready
"1"
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
-
-
-
-
Definition
Terminated normally
Terminated normally
Terminated normally
Mitsubishi microcomputers
M16C / 62 Group
Busy
"0"
-
-
-
-
16
).