31
Bit 6 EEPER: EEPROM data access error
0 EEPROM
＝
data access normal
1 EEPROM
＝
data access error
Note:
1.
When an EEPROM data access error occurs, the supply shuts down and
then entering protection mode with the LED indicator off. It only can be
recovered after the EEPROM error condition is resolved.
2.
Unsupported settings display with
"0"
6.1.3 Notes on PMBus
1 Insert a at least 50msec delay between commands.
.
2.Examples for Format Conversion:
(1) LINEAR16 format: VOUT_COMMAND, VOUT_TRIM, READ_VOUT.
For example:
Vo_real (actual output voltage) = V x 2 , V is from READ_VOUT.
N
If VOUT_MODE = 0x17, meaning N is -9. READ_VOUT is 0x3000
12288, then
→
Vo_real =
= 24.0V
12288 × 2
-9
.
Linear Format Data Bytes
The Mode bits are set to 000b.
The Voltage, in volts, is calculated from the equation:
2
N
Voltage V
=
Where:
Voltage is the parameter of interest in volts;
V is a 16 bit unsigned binary integer; and
N is a 5 bit two' complement binary integer.
s
(2)LINEAR11 format: IOUT_OC_FAULT_LIMIT, READ_VIN、READ_IIN,
READ_IOUT, READ_TEMPERATURE_1, READ_FAN_SPEED_1,
READ_FAN_SPEED_2.
6
●
Physical layer specification
This protocol follows CAN ISO-11898 with Baud rate of 250Kbps.
●
Data Frame
This protocol
es Extended CAN 29-bit identifier frame format or
us
CAN 2.0B.
6.2
CAN Bus Communication Interface
32
●
Communication Timing
Min. request period (Controller to SHP-10K): 50mSec。
。
Max. response time (SHP-10K to Controller): 12.5mSec
。
Min. packet margin time (Controller to SHP-10K): 12.5mSec
PSU CAN-RX
(form Controller)
PSU CAN-TX
Request period
(Controller to PSU/CHG)
Response time
(PSU/CHG to Controller)
RX data
TX data
RX data
Packet Margin time
(Controller to PSU/CHG)
●
Data Field Format
Controller to SHP
Write
:
For example:
Io_real (actual output current) = Y
2 , Y is from READ_IOUT.
×
N
If READ_IOUT is 0xF188, meaning N is -2 and Y is 0x0188. Y is 0x0188
→
392, then Io_real =
= 98.0A
392 × 2
-2
.
7 6 5 4 3
2 1 0 7 6 5 4 3 2 1 0
N
Y
Data Byte High
Data Byte Low
MSB
MSB
Linear Data Format Data Bytes Y, N and the "real world" value is:
The relation between
X = Y 2
N
Where, as described above:
X is the "real world" value;
Y is an 11 bit, two' complement integer; and
s
N is a 5 bit, two' complement integer.
s
Devices that use the Linear format must accept and be able to process any value of
.
N
6
