參數(shù)資料
型號(hào): LTC3880IUJ-1#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC40
封裝: 6 X 6 MM, LEAD FREE, PLASTIC, WJJD-2, QFN-40
文件頁(yè)數(shù): 112/112頁(yè)
文件大?。?/td> 2182K
代理商: LTC3880IUJ-1#PBF
LTC3880/LTC3880-1
99
3880fa
STORE_USER_ALL
The STORE_USER_ALL command instructs the PMBus device to copy the non-volatile user contents of the Operating
Memory to the matching locations in the non-volatile User NVM memory.
Executing this command if the die temperature exceeds 85°C is not recommended and the data retention of 10 years
cannot be guaranteed. If the die temperature exceeds 130°C, the STORE_USER_ALL command is disabled. The com-
mand is re-enabled when the IC temperature drops below 120°C.
Communication with the LTC3880 and programming of the NVM can be initiated when VDD33 is available and VIN
is not applied. To enable the part in this state, using global address 0x5B write 0x2B followed by 0xC4. The part
can now be communicated with, and the project file updated. To write the updated project file to the NVM issue a
STORE_USER_ALL command. When VIN is applied, a MFR_RESET must be issued to allow the PWM to be enabled
and valid ADCs to be read.
This write-only command has no data bytes.
RESTORE_USER_ALL
The RESTORE_USER_ALL command instructs the PMBus device to copy the contents of the non-volatile User memory
to the matching locations in the Operating Memory. The values in the Operating Memory are overwritten by the value
retrieved from the User commands. When a RESTORE_USER_ALL command is issued, the RUN pins and SHARE_CLK
pin is asserted low until the restore is complete. The RUN pins and SHARE_CLK is then released. The RCONFIG resis-
tor dividers are not re-read, and the value stored in NVM is used with the exception of the ASEL pin. The ASEL value
read at power-up or when the part is reset is used to calculate the effective device address using the MSB from NVM
and the LSB based on the ASEL decode.
RESTORE_USER_ALL. RESTORE_USER_ALL commands are disabled if the die exceeds 130°C and are not re-enabled
until the die temperature drops below 120°C.
This write-only command has no data bytes.
MFR_COMPARE_USER_ALL
The MFR_COMPARE_USER_ALL command instructs the PMBus device to compare current command contents with
what is stored in non-volatile memory. If the compare operation detects differences, a CML bit 0 fault will be generated.
This write-only command has no data bytes.
Fault Logging
COMMAND NAME
CMD CODE DESCRIPTION
TYPE
PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
MFR_FAULT_LOG
0xEE
Fault log data bytes. This sequentially retrieved
data is used to assemble a complete fault log.
R Block
N
CF
Y
NA
MFR_FAULT_LOG_ STORE
0xEA
Command a transfer of the fault log from RAM to
EEPROM. This causes the part to behave as if a
channel has faulted off.
Send Byte
N
NA
MFR_FAULT_LOG_CLEAR
0xEC
Initialize the EEPROM block reserved for fault
logging and clear any previous fault logging
locks.
Send Byte
N
NA
PMBus COMMAND DETAILS
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