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2.3 ROM
2.3.1 DEFAULT STORE MEMORY
Default store memory preserves initial parameter in factory shipment.
Restored information to operating memory is being done by implementing
RESTORE_DEFAULT_ALL [ 12h ] command. *1
2.3.2 USER STORE MEMORY
It is memory to preserve the content of operating memory rewritten by master device after input
voltage after input voltage is insulated. Information is restored by implementing
RESTORE_USER_ALL [ 16h ] command and when power supply is started-up. *1
Information within operating memory is preserved in user store memory by implementing
STORE_USER_ALL [ 15h ] command. *2
*1: Valid only for power supply operation is stopped.
Cannot receive command when power supply is operated. SMBAlert is operated.
*2: Please do not insulate input voltage over 3 seconds when command is being implemented.
2.4 Retaining the number of protecting operation
When each protective function are operated, the number of information(0-255times) is
preserved in ROM. Command shown in table 2-1 can read the number of protective
operation and delete the number of counts.
Table 2-1 Reading command for the number of stopping abnormal power supply
Note: In case response of protective operation is auto recovery, it is counted every time
this function is operated after recovery.
8
MFR_CLEAR_FAULT_CNT
F5h
Reset the number of operation at F0h
~
F7h to "00h".
Figure 2-2 Restore and preserving operation for command and parameter
MFR_READ_VIN_OV_FAULT_COUNT
F8h
Read the number of over input voltage protective operation
7
MFR_READ_VIN_UV_FAULT_COUNT
F9h
Read the number of low input voltage protective operation
F2h
Command
Code
Note
F4h
Read the number of over star-up time protective operation
MFR_READ_TON_MAX_FAULT_COUNT
1
MFR_READ_VOUT_OV_FAULT_COUNT
F0h
Read the number of overvoltage protective operation
#
2
MFR_READ_VOUT_UV_FAULT_COUNT
F1h
Read the number of low output voltage protective operation
3
MFR_READ_OT_FAULT_COUNT
Read the number of overheating protective operation
6
4
MFR_READ_UT_FAULT_COUNT
F3h
Read the number of low temperature protective operation
5
_
RAM
ROM
_
Operating memory
Store
STORE_USER_ALL [15h]
Restore
RESTORE_USER_ALL [16h]
User store memory
(EEPROM)
Default store memory
(Data ROM)
Restore
RESTORE_DEFAULT_ALL [12h]
Applications manual
For CHS300/400/500-
I
series
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