Datasheet

LTC2978A
44
2978afa
For more information www.linear.com/LTC2978A
MFR_CONFIG_LT C 2978 Data Contents
BIT(S) SYMBOL OPERATION
b[0] Mfr_config_dac_pol DAC output polarity.
0: Encodes negative (inverting) DC/DC converter trim input.
1: Encodes positive (noninverting) DC/DC converter trim input.
MFR_CONFIG_ALL_LTC2978
This command is used to configure parameters that are common to all channels on the IC. They may be set or reviewed
from any PAGE setting.
MFR_CONFIG_ALL_LT C 2978 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 required
b[1]
Mfr_config_all_longer_pmbus_
timeout
Increase PMBus timeout internal by a factor of 8. Recommended for fault logging.
0: PMBus timeout is not multiplied by a factor of 8
1: PMBus timeout is multiplied by a factor of 8
b[0] Mfr_config_all_vinen_wpu_dis V
IN_EN
charge-pumped, current-limited pull-up disable.
0: Use weak current-limited pull-up on V
IN_EN
after power-up, as long as no faults have forced V
IN_EN
off.
1: Disable weak pull-up. V
IN_EN
driver is three-stated after power-up as long as no faults have forced
V
IN_EN
off.
PMBus COMMAND DESCRIPTION