ncp4201 ON Semiconductor, ncp4201 Datasheet - Page 28

• Manufacturer Part Number: ncp4201
• Description: Ncp4201 Programmable Multi-phase Synchronous Buck Converter With Pmbus
• Manufacturer: ON Semiconductor

Table 12. Manufacturer Specific Command Codes for the NCP4201
Code
Code
0xDO
0x8B
0x8C
0x8D
0x9A
0x9B
Cmd
0x80
0x88
0x96
0x99
Cmd
0xD1
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
Default
Default
0x4101
0x0002
0x0301
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x07
STATUS_ALERT
READ_VOUT
READ_IOUT
READ_POUT
MFR_ID
MFR_MODEL
MFR_REVISION
Lock/Reset
Mfr Config
Description
Description
http://onsemi.com
Bytes
Bytes
#
1
2
2
2
2
2
1
2
1
#
1
1
0x4101
0x0002
0x0301
28
Bit
Read−back output voltage. Voltage is read back in VID Mode.
Read−back output current. Current is read back in Linear Mode
(Amps).
Read−back Output Power, read back in Linear Mode in W’s.
7:6
Bit
Bit
7
6
5
4
3
2
1
0
1
0
5
4
3
2
1
0
PMB_TO_EN
ALERT_EN
FAULT_EN
MONITOR
ENABLE_
WARN
FAULT
Name
V
V
Res
Res
Res
Res
Res
Res
Name
Name
Reset
MON
MON
Lock
Res
Res
PSI
Gets asserted when V
programmed WARN limits.
Gets asserted when V
programmed FAULT limits.
Resets all registers to their POR Value. Has
no effect if Lock bit is set.
Logic 1 locks all limit values to their current
settings. Once this bit is set, all lockable
registers become read−only and cannot be
modified until the NCP4201 is powered down
and powered up again. This prevents rogue
programs such as viruses from modifying
critical system limit settings. (Lockable).
These bits sets the number of phases turned
on during PSI.
00 = CL set for 1 Phase (default)
01 = CL set for 2 Phases
10 = CL set for 1 Phase
11 = CL set for 1 Phase
PMBus Timeout Enable. When the
PMB_TO_EN bit is set to 1, the PMBus
Timeout feature is enabled. In this state if, at
any point during an PMBus transaction
involving the NCP4201, activity ceases for
more than 35 ms, the NCP4201 assumes the
bus is locked and releases the bus. This
allows the NCP4201 to be used with SMBus
controllers that cannot handle SMBus
timeouts. (Lockable).
Enable the FAULT pin, Default = 1.
Enable the ALERT pin.
When the ENABLE_MONITOR bit is set to 1,
the NCP4201 starts conversions with the ADC
and monitors the voltages.
Comment
Comment
Description
Description
Description
MON
MON
exceeds it
exceeds it