參數(shù)資料
型號(hào): PIP8000FHN/N1
廠商: NXP SEMICONDUCTORS
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC28
封裝: 6 X 6 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT788-1, HVQFN-28
文件頁(yè)數(shù): 23/26頁(yè)
文件大?。?/td> 126K
代理商: PIP8000FHN/N1
PIP8000FHN_2
NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 6 July 2009
6 of 26
NXP Semiconductors
PIP8000FHN
Digital power supervisor
The I2C slave address can be set using the manufacturer specic command
I2C_ADDRESS and pin stripping the I2C subaddress pins. When the I2C slave address is
changed during operation the STORE_DEFAULT_ALL or STORE_USER_ALL command
must be issued to save the I2C slave address in NVRAM and then a software reset needs
to be issued to activate the new I2C address:
I2C address = I2C_ADDRESS + (pin strip bit[A2]bit[A1]bit[A0] < 1)
If an invalid I2C_ADDRESS is read from I2C during start-up the I2C address will be set to
the SMBus device default address. And the CONFIG_COMMAND bit[7] will be set. This
bit indicates if the PMBus state machine will not start. This is done to prevent wrong
coefcients or other conguration settings to be used in the PMBus state machine.
The LSB of I2ADR is the general call bit. When this bit is set, the general call address
(00h) is recognized.
7.4.2 ALERT functionality
The PIP8000FHN supports the SMBus SMAlert line. The alert protocol creates a method
for an I2C slave device to signal the I2C host device. The host can identify the slave with
the fault.
Alter signaling the host the PIP8000FHN will change its slave address to 0x18h (ARA).
The host responds to the SMAlert signal by reading a byte from 0x18h. The slave will
respond with its original slave address and return to that address. The SMAlert line can be
used as a wired system or in a power supply system with multiple PIP8000FHN
supervisor chips.
Fault and warning notication using SMAlert can be congured as described in
Table 3.
Overview slave addresses
Slave address
bits 7-1
R/W number bit
bit 0
Description
0000 000
0
General call address
0000 000
1
START byte
0000 001
X
CBUS address
0000 010
X
Address reserved for different bus format
0000 011
X
Reserved for future use
0000 1XX
X
Reserved for future use
0101 000
X
Reserved for ACCESS.bus host
0110 111
X
Reserved for ACCESS.bus default address
1111 0XX
X
10-bit slave addressing
1111 1XX
X
Reserved for future use
0001 000
X
SMBus host
0001 100
X
SMBus alert response address
1100 001
X
SMBus device default address
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