LTC2936
18
2936fa
For more information www.linear.com/LTC2936
operaTion
PADS (Command Byte 0x1A)
The PADS register returns the status of the GPIn, GPIOn
and CMPn pads.
PADS Data Contents
BIT(S) SYMBOL OPERATION
b[15:11] Reserved Ignore
b[10] GPI2_STATUS 0: GPI2 pin is logic low.
1: GPI2 pin is logic high.
b[9] GPI1_ST
ATUS 0: GPI1 pin is logic low.
1: GPI1 pin is logic high.
b[8] GPIO3_ST
ATUS 0: GPIO3 pin is logic low.
1: GPIO3 pin is logic high.
b[7] GPIO2_STATUS 0: GPIO2 pin is logic low.
1: GPIO2 pin is logic high.
b[6] GPIO1_ST
ATUS 0: GPIO1 pin is logic low.
1: GPIO1 pin is logic high.
b[5] CMP6_ST
ATUS 0: CMP6 pin is logic low.
1: CMP6 pin is logic high.
b[4] CMP5_ST
ATUS 0: CMP5 pin is logic low.
1: CMP5 pin is logic high.
b[3] CMP4_ST
ATUS 0: CMP4 pin is logic low.
1: CMP4 pin is logic high.
b[2] CMP3_ST
ATUS 0: CMP3 pin is logic low.
1: CMP3 pin is logic high.
b[1] CMP2_ST
ATUS 0: CMP2 pin is logic low.
1: CMP2 pin is logic high.
b[0] CMP1_ST
ATUS 0: CMP1 pin is logic low.
1: CMP1 pin is logic high.
CLEAR_HISTORY (Command Byte 0x1B)
The CLEAR_HISTORY command clears all the faults logged
in the volatile HISTORY_WORD register. A manual reset
performs the same operation if GPI
n
_MR_RESPONSE = 1.
Clearing HISTORY_WORD does not affect the
STATUS_
WORD content. Processing of the CLEAR_HISTORY
command typically takes less than 10ms, and the part will
not acknowledge other I
2
C operations during that time.
STORE_USER (Command Byte 0x1C)
RESTORE_USER (Command Byte 0x1D)
T
he
STORE_USER and RESTORE_USER commands
access nonvolatile EEPROM memory. Once a command is
stored in EEPROM using STORE_USER, it will be restored
to volatile operating memory with the RESTORE_USER
command or when the part powers up.
BACKUP_WORD (Command Byte 0x1E)
After the first fault occurs, HISTORY_WORD is written to
EEPROM for backup. Any subsequent BACKUP_WORD
write following a fault is inhibited until the CLEAR_HISTORY
command is issued. BACKUP_WORD can be retrieved
by sending a RESTORE_USER command followed by a
BACKUP_WORD read. BACKUP_WORD can be cleared
in EEPROM by sending a CLEAR_HISTORY command
followed by a STORE_USER command.