參數(shù)資料
型號(hào): NCT214MT3R2G
廠商: ON SEMICONDUCTOR
元件分類: 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, QCC10
封裝: 3 X 3 MM, 0.50 MM PITCH, LEAD FREE, WQFN-10
文件頁數(shù): 4/19頁
文件大?。?/td> 269K
代理商: NCT214MT3R2G
NCT214
http://onsemi.com
12
Table 8. List of Registers
Read Address (Hex)
Write Address (Hex)
Name
PowerOn Default
Not Applicable
Address Pointer
Undefined
00
Not Applicable
Local Temperature Value
0000 0000 (0x00)
01
Not Applicable
External Temperature Value High Byte
0000 0000 (0x00)
02
Not Applicable
Status
Undefined
03
09
Configuration
0000 0000 (0x00)
04
0A
Conversion Rate
0000 1000 (0x08)
05
0B
Local Temperature High Limit
0101 0101 (0x55) (85°C)
06
0C
Local Temperature Low Limit
0000 0000 (0x00) (0°C)
07
0D
External Temperature High Limit High Byte
0101 0101 (0x55) (85°C)
08
0E
External Temperature Low Limit High Byte
0000 0000 (0x00) (0°C)
Not Applicable
0F (
Note 1)
OneShot
10
Not Applicable
External Temperature Value Low Byte
0000 0000
11
External Temperature Offset High Byte
0000 0000
12
External Temperature Offset Low Byte
0000 0000
13
External Temperature High Limit Low Byte
0000 0000
14
External Temperature Low Limit Low Byte
0000 0000
19
External THERM Limit
0101 0101 (0x55) (85°C)
20
Local THERM Limit
0101 0101 (0x55) (85°C)
21
THERM Hysteresis
0000 1010 (0x0A) (10°C)
22
Consecutive ALERT
0000 0001 (0x01)
FE
Not Applicable
Manufacturer ID
0100 0001 (0x41)
FF
Not Applicable
Die Revision Code
0101 0111 (0x57)
1. Writing to Address 0x0F causes the NCT214 to perform a single measurement. It is not a data register, and it does not matter what data is
written to it.
Serial Bus Interface
Control of the NCT214 is carried out via the serial bus.
The NCT214 is connected to this bus as a slave device, under
the control of a master device.
The NCT214 has an SMBus/I2C timeout feature. When
this is enabled, the SMBus/I2C times out after typically
25 ms of no activity. However, this feature is not enabled by
default. Bit 7 of the consecutive alert register (Address =
0x22) should be set to enable it.
Addressing the Device
In general, every SMBus/I2C device has a 7bit device
address, except for some devices that have extended 10bit
addresses. When the master device sends a device address
over the bus, the slave device with that address responds.
The NCT214 has two address pins, ADD0 and ADD1, to
allow selection of the device address, so that several
NCT214s can be used on the same bus, and/or to avoid
conflict with other devices.
Although only two address pins are provided, these are
threestate, and can be grounded, left unconnected, or tied to
VDD, so that a total of nine different addresses are possible,
as shown in Table 9. It should be noted that the state of the
address pins is only sampled at powerup, so changing them
after powerup has no effect.
Table 9. Device Addresses
ADD0
ADD1
Device Address
0
0011 000
0
NC
0011 001
0
1
0011 010
NC
0
0101 001
NC
0101 010
NC
1
0101 011
1
0
1001 100
1
NC
1001 101
1
1001 110
The serial bus protocol operates as follows:
1. The master initiates a data transfer by establishing
a start condition, defined as a hightolow
transition on SDATA, the serial data line, while
SCLK, the serial clock line, remains high. This
indicates that an address/data stream follows. All
slave peripherals connected to the serial bus
respond to the start condition and shift in the next
eight bits, consisting of a 7bit address (MSB first)
plus an R/W bit, which determines the direction of
the data transfer, that is, whether data is written to,
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