MAX16064 Datasheet, PDF (36/52 Pages) Maxim Integrated Products – ±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control and PMBus Interface

±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
restart. The status of ENOUT_ under fault conditions is
not affected by this command and should change only
if commanded through the OPERATION command or
A3/CONTROL.
If the fault is still present after the CLEAR_FAULTS com-
mand is executed, the fault bit is set again and the host
is also notified by asserting SMBALERT.
This command is write-only. There is no data byte for
this command.
WRITE_PROTECT (10h)
The WRITE_PROTECT command is used to provide
protection against accidental changes to the
MAX16064 operating memory. All supported com-
mands may have their parameters read, regardless of
the WRITE_PROTECT settings. The WRITE_PROTECT
message content is described in Table 7.
STORE_DEFAULT_ALL (11h)
The STORE_DEFAULT_ALL command instructs the
MAX16064 to transfer the user memory configuration
information to an external I²C EEPROM device (default
memory) attached to A1/SCLE and A2/SDAE. If an error
occurs during the transfer, SMBALERT asserts and the
CML bit is set to 1.
It is permitted to use the STORE_DEFAULT_ALL com-
mand while the power supply is operating. However,
the MAX16064 is unresponsive to PMBus commands
while transferring the configuration. ENOUT_ maintains
its state.
This command is write-only. There is no data byte for
this command.
For information on EEPROM contents, see the External
EEPROM Interface section.
RESTORE_DEFAULT_ALL (12h)
The RESTORE_DEFAULT_ALL command transfers the
default configuration information from the external I²C
EEPROM device attached to A1/SCLE and A2/SDAE to
the user memory registers in the device. The
RESTORE_DEFAULT_ALL command can only be exe-
cuted when the power supply is off. Otherwise, a com-
munication fault occurs (CML = 1) and SMBALERT
asserts. If an error occurs during data transfer,
SMBALERT asserts and the CML bit is set to 1.
The STATUS_BYTE, STATUS_WORD and
MFR_FAULT_STATUS values are not restored by the
RESTORE_DEFAULT_ALL command.
This command is write-only. There is no data byte for
this command.
For information on EEPROM contents, see the External
EEPROM Interface section.
CAPABILITY (19h)
The CAPABILITY command is used to determine some
key capabilities of the MAX16064. The CAPABILITY
command is read-only. The message content is
described in Table 8.
Table 7. WRITE_PROTECT Message Contents
DATA BYTE VALUE
1000 0000
0100 0000
0010 0000
0000 0000
MEANING
Disable all writes except the WRITE_PROTECT command.
Disable all writes except the WRITE_PROTECT, OPERATION, and PAGE commands.
Disable all writes except the WRITE_PROTECT, OPERATION, PAGE, ON_OFF_CONFIG, and
VOUT_COMMAND commands.
Enable writes for all commands (default)
Table 8. CAPABILITY Command Message Contents
BIT
DESRIPTION
MEANING
7
Packet error checking
1 = Packet error checking is supported. Always returns a 1.
6:5
Maximum PMBus bus speed
00 = Maximum supported bus speed is 100kHz.
4
SMBALERT#
1 = Device supports an SMBALERT# output and the SMBus ARA
protocol.
3:0
Reserved
MAX16064 returns 0000.
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