Datasheet

LTC2974
40
2974fc
For more information www.linear.com/LTC2974
MFR_CONFIG_ALL_LTC2974 Data Contents
BIT(S) SYMBOL OPERATION
b[7] Mfr_config_all_fault_log_enable Enable fault logging to EEPROM in response to Fault.
0: Fault logging to EEPROM is disabled.
1: Fault logging to EEPROM is enabled.
b[6] Mfr_config_all_vin_on_clr_faults_en Allow V
IN
rising above VIN_ON to clear all latched faults.
0: VIN_ON clear faults feature is disabled.
1: VIN_ON clear faults feature is enabled.
b[5] Mfr_config_all_control1_pol Selects active polarity of CONTROL1 pin
0: Active low (pull pin low to start unit).
1: Active high (pull pin high to start unit).
b[4] Mfr_config_all_control0_pol Selects active polarity of CONTROL0 pin
0: Active low (pull pin low to start unit).
1: Active high (pull pin high to start unit).
b[3] Mfr_config_all_vin_share_enable Allow this unit to hold SHARE_CLK pin low when V
IN
has not risen above VIN_ON or has fallen
below VIN_OFF. When enabled this unit will also turn all channels off in response to Share-clock
being held low.
0: SHARE_CLK inhibit is disabled.
1: SHARE_CLK inhibit is enabled.
b[2] Mfr_config_all_pec_en PMBus packet error checking enable.
0: PEC is accepted but not required.
1: PEC is enabled.
b[1] Mfr_config_all_longer_pmbus_timeout Increase PMBus timeout interval by a factor of 8. Recommended for fault logging.
0: PMBus timeout is multiplied by a factor of 8.
1: PMBus timeout is not multiplied by a factor of 8.
b[0] Mfr_config_all_auxfaultb_wpu_dis AUXFAULTB charge-pumped, current-limited pull-up disable.
0: Use weak current-limited pull-up on AUXFAULTB after power-up, as long as no faults have forced
AUXFAULTB off.
1: Disable weak pull-up. AUXFAULTB driver is tri-stated after power-up as long as no faults have
forced AUXFAULTB off.
pMbus coMManD DescripTion
PROGRAMMING USER EEPROM SPACE
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED FORMAT UNITS EEPROM
DEFAULT
VALUE
REF
PAGE
STORE_USER_ALL 0x15 Store entire operating memory to
EEPROM.
Send Byte N NA
41
RESTORE_USER_ALL 0x16 Restore entire operating memory from
EEPROM.
Send Byte N NA
41
MFR_EE_UNLOCK 0xBD Unlock user EEPROM for access by
MFR_EE_ERASE and MFR_EE_DATA
commands.
R/W Byte N Reg NA
41
MFR_EE_ERASE 0xBE Initialize user EEPROM for bulk
programming by MFR_EE_DATA.
R/W Byte N Reg NA
42
MFR_EE_DATA 0xBF Data transferred to and from EEPROM
using sequential PMBus word reads or
writes. Supports bulk programming.
R/W Word N Reg NA
42