M30222 Datasheet, PDF (222/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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Specifications in this manual are tentative and subject to change
MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
Serial I/O Mode 1 (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Status Register 1 (SRD1)
Status register 1 indicates the status of serial communications, results from ID checks, and results
from check sum comparisons. It can be read after the SRD by writing the read status register command
(7016). Also, status register 1 is cleared by writing the clear status register command (5016). Table 1.81
gives the definition of each status register 1 bit. "0016" is output when power is turned ON and the flag
status is mainteined even after the reset.
Table 1.81. Status register definitions for SRD1
SRD 1 bits
Status Name
SR15 (bit 7)
SR14 (bit 6)
SR13 (bit 5)
SR12 (bit 4)
SR11 (bit 3)
SR10 (bit 2)
SR9 (bit 1)
SR8 (bit 0)
Boot update complete bit
Reserved
Reserved
Checksum match bit
ID check completed bits
Data receive time out
Reserved
Definition
1
0
Update completed
Not completed
_
_
_
_
Match
No match
0 0 Not verified
0 1 Verification mismatch
1 0 Reserved
1 1 Verified
Time out
Normal operation
_
_
Boot Update Completed Bit (SR15)
This flag indicates whether the control program was downlaoded to the RAM or not, using the download
function.
Check Sum Consistency Bit (SR12)
This flag indicates whether the check sum matches or not when a program is downloaded for execution using
the download function.
ID Check completed Bits (SR11 and SR10)
These flags indicate the result of ID checks. Some commands cannot be accepted without an ID check.
Data Reception Time Out (SR9)
This flag indicates when a time out error is generated during data reception. If this flag is attached during data
reception, the received data is discarded and the microcomputer returns to the command wait state.
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