BCM3814x60E10A5yzz
Where:
PMBus™ Interface
X, is a “real world” value in units (A, V, °C, s)
Refer to “PMBus Power System Management Protocol Specification
Revision 1.2, Part I and II” for complete PMBus specifications details
visit http://pmbus.org.
Y, is a two’s complement integer received from the internal µC
m, b and R are two’s complement integers defined as follows:
Device Address
Command
TON_DELAY
Code
60h
88h
89h
8Bh
8Ch
8Dh
96h
A0h
A1h
A4h
A5h
A6h
A7h
D1h
D4h
m
R
3
1
2
1
2
0
0
0
0
0
0
0
0
0
5
b
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
The PMBus address (ADDR Pin) should be set to one of a
predetermined 16 possible addresses shown in the table below
using a resistor between ADDR pin and SGND pin.
1
READ_VIN
1
READ_IIN
1
The BCM accepts only a fixed and persistent address and does not
support SMBus address resolution protocol. At initial power up, the
BCM internal µC will sample the address pin voltage, and will hold
this address until device power is removed.
READ_VOUT
1
READ_IOUT
1
READ_TEMPERATURE_1
READ_POUT
1
Slave
Address
Recommended
Resistor RADDR (Ω)
1
ID
HEX
MFR_VIN_MIN
MFR_VIN_MAX
MFR_VOUT_MIN
MFR_VOUT_MAX
MFR_IOUT_MAX
MFR_POUT_MAX
READ_K_FACTOR
READ_BCM_ROUT
1
1
2
1010 000b
1010 001b
1010 010b
1010 011b
1010 100b
1010 101b
1010 110b
1010 111b
1011 000b
1011 001b
1011 010b
1011 011b
1011 100b
1011 101b
1011 110b
1011 111b
50h
51h
52h
53h
54h
55h
56h
57h
58h
59h
5Ah
5Bh
5Ch
5Dh
5Eh
5Fh
487
1050
1
1
3
1870
1
4
2800
1
5
3920
1
65536
1
6
5230
7
6810
8
8870
9
11300
14700
19100
25500
35700
53600
97600
316000
[1] Default READ LO side voltage returned when BCM unit is disabled = -300V.
[2] Default READ Temperature returned when BCM unit is disabled = -273°C.
10
11
12
13
14
15
16
No special formatting is required when lowering the supervisory
limits and warnings.
Reported DATA Formats
The BCM internal µC employs a direct data format where all
reported internal µC measurements are in Volts, Amperes,
Degrees Celsius, or Seconds. The host uses the following PMBus
specification to interpret received values metric prefixes. Note that
the Coefficients command is not supported:
1
m
X =
(
• (Y • 10-R - b)
)
BCM® in a VIA Package
Page 23 of 39
Rev 1.4
09/2016
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800 927.9474
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