LTC2977 datasheet(92/138 Pages) AD

92 / 138 page

LTM4664A

Rev. 0

For more information www.analog.com

PMBus COMMAND DETAILS

MFR_ADDRESS

The MFR_ADDRESS command byte sets the 7 bits of the PMBus slave address for this device.

Setting this command to a value of 0x80 disables device addressing. The GLOBAL device address, 0x5A and 0x5B,

cannot be deactivated. If RCONFIG is set to ignore, the ASEL pin is still used to determine the LSB of the channel

address. If the ASEL pin is open, the LTM4664A will use the MFR_ADDRESS value stored in NVM to construct the

effective address of the part.

This command has one data byte.

MFR_RAIL_ADDRESS

The MFR_RAIL_ADDRESS command enables direct device address access to the PAGE activated channel. The value

of this command should be common to all devices attached to a single power supply rail.

The user should only perform command writes to this address. If a read is performed from this address and the rail

devices do not respond with EXACTLY the same value, the LTM4664A will detect bus contention and may set a CML

communications fault.

Setting this command to a value of 0x80 disables rail device addressing for the channel.

This command has one data byte.

GENERAL CONFIGURATION COMMANDS

COMMAND NAME

CMD CODE DESCRIPTION

TYPE

PAGED

DATA

FORMAT UNITS

NVM

DEFAULT

VALUE

MFR_CHAN_CONFIG

0xD0

Configuration bits that are channel specific. R/W Byte

Reg

0x10

MFR_CONFIG_ALL

0xD1

General configuration bits.

R/W Byte

Reg

0x21

MFR_CHAN_CONFIG

General purpose configuration command common to multiple LTC products.

BIT

MEANING

Reserved

Disable RUN Low. When asserted the RUN pin is not pulsed low if commanded OFF.

Enable short cycle recognition if this bit is set to a 1.

SHARE_CLOCK control. If SHARE_CLOCK is held low, the output is disabled.

No FAULT ALERT, ALERT is not pulled low if FAULT is pulled low externally. Assert this bit if either POWER_GOOD or VOUT_UVUF are

propagated on FAULT.

Disables the VOUT decay value requirement for MFR_RETRY_TIME and tOFF(MIN) processing. When this bit is set to a 0, the output must decay to

less than 12.5% of the programmed value for any action that turns off the rail including a fault, an OFF/ON command, or a toggle of RUN from

high to low to high.

This command has one data byte.

LTC2977 Datasheet(PDF) 92 Page - Analog Devices

LTC2977 Datasheet(HTML) 92 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL