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LTC2972 Datasheet(PDF) 23 Page - Linear Technology

Part # LTC2972
Description  2-Channel PMBus Power System Manager Featuring Programmable Power Good Outputs
PDF  112 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2972 Datasheet(HTML) 23 Page - Linear Technology

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LTC2972
23
2972fa
For more information www.linear.com/LTC2972
Table 1. LTC2972 Address Look-Up Table with MFR_I2C_BASE_ADDRESS Set to 7-bit 0x5C
ADDRESS PINS
DESCRIPTION
HEX DEVICE
ADDRESS
BINARY DEVICE ADDRESS
ASEL1
ASEL0
7-Bit
8-Bit
6
5
4
3
2
1
0
R/W
X
X
Alert Response
0C
19
0
0
0
1
1
0
0
1
X
X
Global
5B
B6
1
0
1
1
0
1
1
0
L
L
N = 0
5C*
B8
1
0
1
1
1
0
0
0
L
NC
N = 1
5D
BA
1
0
1
1
1
0
1
0
L
H
N = 2
5E
BC
1
0
1
1
1
1
0
0
NC
L
N = 3
5F
BE
1
0
1
1
1
1
1
0
NC
NC
N = 4
60
C0
1
1
0
0
0
0
0
0
NC
H
N = 5
61
C2
1
1
0
0
0
0
1
0
H
L
N = 6
62
C4
1
1
0
0
0
1
0
0
H
NC
N = 7
63
C6
1
1
0
0
0
1
1
0
H
H
N = 8
64
C8
1
1
0
0
1
0
0
0
H = Tie to VDD33, NC = No Connect = Open or Float, L = Tie to GND, X = Don’t Care
*MFR_I2C_BASE_ADDRESS = 7-bit 0x5C (Factory Default)
OPERATION
SLAVE ADDRESS
COMMAND CODE
DATA BYTE
Wr A
A
A P
2972 F02
S
7
8
8
1 1
1
1 1
1
SLAVE ADDRESS
COMMAND CODE
DATA BYTE LOW
Wr A
A
A P
2972 F03
S
7
8
8
1
DATA BYTE HIGH
8
1 1
1
1 1
1
A
SLAVE ADDRESS
COMMAND CODE
DATA BYTE
Wr A
A
A P
2972 F04
S
7
8
8
1
PEC
8
1 1
1
1 1
1
A
Figure 2. Write Byte Protocol
Figure 1. PMBus Packet Protocol Diagram Element Key
Figure3. Write Word Protocol
Figure 4. Write Byte Protocol with PEC
2972 F01
S
START CONDITION
Sr
REPEATED START CONDITION
Rd
READ (BIT VALUE OF 1)
Wr
WRITE (BIT VALUE OF 0)
A
NOT ACKNOWLEDGE (HIGH)
A
ACKNOWLEDGE (LOW)
P
STOP CONDITION
PEC PACKET ERROR CODE
MASTER TO SLAVE
SLAVE TO MASTER
CONTINUATION OF PROTOCOL
...



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