LTM4630 datasheet(40/136 Pages) LINER

40 / 136 page

LTM4676A

4676afa

For more information www.linear.com/LTM4676A

pMbus coMManD suMMary

Table 1. Summary of Supported Commands and Feature Differences Between the LTM4676A and the LTM4676 (Items of Greatest

Significance Indicated by Gray-Shaded Cells; Common Commands, Values and Attributes Indicated by Non-Shaded, Merged Cells)

PMBus COMMAND

NAME, OR FEATURE

CMD CODE

(REGISTER)

COMMAND OR FEATURE

DESCRIPTION

LTM4676A NVM FACTORY-DEFAULT

VALUE AND/OR ATTRIBUTES

LTM4676 NVM FACTORY-DEFAULT

VALUE AND/OR ATTRIBUTES

PAGE

0x00

Channel or page currently targeted

for paged communications.

No difference: 0x00, read/write, non-paged, not stored in NVM.

OPERATIONn

0x01

Operating mode control. On/off,

margin high and margin low.

No difference: 0x80, read/write, paged, stored in user-editable NVM.

ON_OFF_CONFIGn

0x02

RUNn pin and On/Off

Configuration.

No difference: 0x1F, read/write, paged, stored in user-editable NVM.

CLEAR_FAULTS

0x03

Clear any fault bits that have been

set.

No difference: default value not applicable, send byte only, non-paged, not

stored in NVM.

114

PAGE_PLUS_WRITE

0x05

Write a command directly to a

specified page.

Default value not applicable, write-

only, non-paged, not stored in NVM.

Command not supported.

PAGE_PLUS_READ

0x06

Read a command directly from a

specified page.

Default value not applicable, read/

write, non-paged, not stored in

NVM.

Command not supported.

WRITE_PROTECT

0x10

Level of protection provided by the

device against accidental changes.

No difference: 0x00, read/write, non-paged, stored in user-editable NVM.

STORE_USER_ALL

0x15

Store user operating memory to

EEPROM (user-editable NVM).

No difference: default value not applicable, send byte only, non-paged, not

stored in NVM.

125

RESTORE_USER_

ALL

0x16

Restore user operating memory

from EEPROM.

Default value not applicable, send

byte only, non-paged, not stored in

NVM.

Identical to MFR_RESET command

(0xFD).

Reserved. Execute MFR_RESET

command (0xFD), instead.

126

CAPABILITY

0x19

Summary of PMBus optional

communication protocols

supported by this device.

No difference: 0xB0, read-only, non-paged, not stored in NVM.

113

PMBUS COMMANDS

Table 1 lists supported PMBus commands and

manufacturerspecificcommands.Acompletedescription

of these commands can be found in the “PMBus Power

System Management Protocol Specification – Part II

– Revision 1.2." Users are encouraged to reference

this specification. Exceptions or manufacturer specific

implementations are listed in Table 1.

All commands from 0xD0 through 0xFF not listed in this

table are implicitly reserved by the manufacturer. Users

should avoid blind writes within this range of commands

to avoid undesired operation of the part. All commands

from0x00through0xCFnotlistedinthistableareimplicitly

not supported by the manufacturer. Attempting to access

non-supported or reserved commands may result in a

CML command fault event. All output voltage settings and

measurements are based on the VOUT_MODE setting of

0x14. This translates to an exponent of 2–12.

IfPMBuscommandsarereceivedfasterthantheyarebeing

processed, the part may become too busy to handle new

commands. In these circumstances the part follows the

protocols defined in the PMBus Specification v1.2, Part

II, Section 10.8.7, to communicate that it is busy.

The part includes handshaking features to eliminate busy

errors and simplify error handling software while ensuring

robust communication and system behavior. Please refer

to the PMBus Communication and Command Processing

subsectionintheApplicationsInformationsectionfordetails.

LTM4630 Datasheet(PDF) 40 Page - Linear Technology

LTM4630 Datasheet(HTML) 40 Page - Linear Technology

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