MAX16064
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
______________________________________________________________________________________ 27
The MAX16064 supports the group command. The
group command is used to send commands to more
than one PMBus device. It is not required that all the
devices receive the same command. However, no
more than one command can be sent to any one
device in one group command packet. The group
command must not be used with commands that
require receiving devices to respond with data, such
as the STATUS_BYTE command. When the
MAX16064 receives a command through this pro-
tocol, it immediately begins execution of the
received command after detecting the STOP con-
dition.
The MAX16064 supports the PAGE command and uses
it to select which individual channel to access.
When the data word is transmitted, the lower order byte
is sent first and the higher order byte is sent last. Within
any byte, the most significant bit (MSB) is sent first and
the least significant bit (LSB) is sent last.
The MAX16064 SMBus interface supports Packet Error
Checking (PEC). See the
MFR_MODE (D1h)
section.
ADDR
SLAVE ADDRESS COMMAND BYTE:
SELECTS TO WHICH
COMMAND PARAMETER
TO WRITE
DATA BYTE: DATA FOR THE COMMAND
SET BY THE COMMAND BYTE
WRITE BYTE FORMAT
SW
PA A A
7 BITS
COMMAND
8 BITS
DATA
8 BITS
ADDR
SLAVE ADDRESS COMMAND BYTE:
SELECTS FROM WHICH
COMMAND PARAMETER
TO READ
DATA BYTE: DATA FOR THE COMMAND
SET BY THE COMMAND BYTE
READ BYTE FORMAT
SSRW
PA R AA NA
7 BITS
ADDR
SLAVE ADDRESS:
REPEATED DUE TO
CHANGE IN DATA-FLOW
DIRECTION
7 BITS
COMMAND
8 BITS
DATA
8 BITS
ADDR
SLAVE ADDRESS COMMAND BYTE:
SELECTS TO WHICH
COMMAND PARAMETER
TO WRITE
DATA BYTE: DATA FOR THE COMMAND SET BY THE
COMMAND BYTE
WRITE WORD FORMAT
SW
PA A A
7 BITS
COMMAND
8 BITS
DATA0
8 BITS
ADATA1
8 BITS
ADDR
SLAVE ADDRESS COMMAND BYTE: SEND
COMMAND WITH NO DATA
SEND BYTE FORMAT
SW
S = START CONDITION
SR = REPEATED START CONDITION
P = STOP CONDITION
= SLAVE TRANSMISSION
PA A
7 BITS
COMMAND
8 BITS
ADDR
SLAVE ADDRESS COMMAND BYTE:
SELECTS FROM WHICH
COMMAND PARAMETER
TO READ
DATA BYTE: DATA FOR THE COMMAND SET BY THE
COMMAND BYTE
READ WORD FORMAT
SSRW
PA R AA A
7 BITS
ADDR
SLAVE ADDRESS:
REPEATED DUE TO
CHANGE IN DATA-FLOW
DIRECTION
7 BITS
COMMAND
8 BITS
DATA0
8 BITS
NADATA1
8 BITS
(30 pages)
(23 pages)
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