- 您现在的位置：买卖IC网 > PDF目录17298 > MCP9800DM-PCTL (Microchip Technology)BOARD DEMO FOR PICTAIL MCP9800 PDF资料下载
参数资料
| 型号： | MCP9800DM-PCTL |
| 厂商： | Microchip Technology |
| 文件页数： | 11/42页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO FOR PICTAIL MCP9800 |
| 标准包装： | 1 |
| 系列： | PICtail™ |
| 传感器类型： | 温度 |
| 传感范围： | -55°C ~ 125°C |
| 接口： | I²C，SM 总线 |
| 灵敏度： | ±0.5°C |
| 电源电压： | 2.7 V ~ 5.5 V |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP9800 |
| 产品目录页面： | 683 (CN2011-ZH PDF) |
| 相关产品： | MCP9800A5T-MOTGDKR-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A0T-MOTGDKR-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A5T-MOTGCT-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A0T-MOTGCT-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A5T-MOTGTR-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A0T-MOTGTR-ND - IC SENSOR THERMAL 2.7V SOT23-5 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
MCP9800/1/2/3
4.0
SERIAL COMMUNICATION
4.1.1
DATA TRANSFER
4.1
2-Wire SMBus/Standard Mode
I 2 C? Protocol-Compatible
Interface
Data transfers are initiated by a Start condition (Start),
followed by a 7-bit device address and a read/write bit.
An Acknowledge (ACK) from the slave confirms the
reception of each byte. Each access must be
terminated by a Stop condition (Stop).
The MCP9800/1/2/3 serial clock input (SCL) and the
bidirectional serial data line (SDA) form a 2-wire
bidirectional SMBus/Standard mode I 2 C compatible
communication port (refer to the Digital Input/Output
Timing Specifications Table ).
The following bus protocol has been defined:
Repeated communication is initiated after t B-FREE .
This device does not support sequential register read/
write. Each register needs to be addressed using the
Register Pointer.
This device supports the Receive Protocol. The
register can be specified using the pointer for the initial
read. Each repeated read or receive begins with a Start
TABLE 4-1:
Term
MCP9800 SERIAL BUS
PROTOCOL DESCRIPTIONS
Description
condition and address byte. The MCP9800/1/2/3
retains the previously selected register. Therefore, it
outputs data from the previously-specified register
(repeated pointer specification is not necessary).
Master The device that controls the serial bus,
typically a microcontroller.
Slave The device addressed by the master,
such as the MCP9800/1/2/3.
Transmitter Device sending data to the bus.
4.1.2 MASTER/SLAVE
The bus is controlled by a master device (typically a
microcontroller) that controls the bus access and
generates the Start and Stop conditions. The
MCP9800/1/2/3 is a slave device and does not control
Receiver
Start
Stop
Device receiving data from the bus.
A unique signal from master to initiate
serial interface with a slave.
A unique signal from the master to
other devices in the bus. Both master and slave
devices can operate as either transmitter or receiver.
However, the master device determines which mode is
activated.
terminate serial interface from a slave.
4.1.3
START/STOP CONDITION
Read/Write A read or write to the MCP9800/1/2/3
registers.
ACK A receiver Acknowledges (ACK) the
reception of each byte by polling the
bus.
A high-to-low transition of the SDA line (while SCL is
high) is the Start condition. All data transfers must be
preceded by a Start condition from the master. If a Start
condition is generated during data transfer, the
MCP9800/1/2/3 resets and accepts the new Start
NAK
Busy
Not Busy
Data Valid
A receiver Not-Acknowledges (NAK) or
releases the bus to show End-of-Data
(EOD).
Communication is not possible
because the bus is in use.
The bus is in the Idle state, both SDA
and SCL remain high.
SDA must remain stable before SCL
becomes high in order for a data bit to
be considered valid. During normal
data transfers, SDA only changes state
while SCL is low.
condition.
A low-to-high transition of the SDA line (while SCL is
high) signifies a Stop condition. If a Stop condition is
introduced during data transmission, the MCP9800/1/
2/3 releases the bus. All data transfers are ended by a
Stop condition from the master.
4.1.4 ADDRESS BYTE
Following the Start condition, the host must transmit an
8-bit address byte to the MCP9800/1/2/3. The address
for the MCP9800 Temperature Sensor is
‘ 1001,A2,A1,A0 ’ in binary, where the A2, A1 and A0
bits are set externally by connecting the corresponding
pins to V DD ‘ 1 ’ or GND ‘ 0 ’. The 7-bit address
transmitted in the serial bit stream must match the
selected address for the MCP9800/1/2/3 to respond
with an ACK. Bit 8 in the address byte is a read/write
bit. Setting this bit to ‘ 1 ’ commands a read operation,
while ‘ 0 ’ commands a write operation (see Figure 4-1 ).
? 2010 Microchip Technology Inc.
DS21909D-page 11
相关PDF资料 |
PDF描述 |
|---|---|
| IRS2330JTRPBF | IC BRIDGE DVR 3PH 600V 44-PLCC |
| EBM24DSEN | CONN EDGECARD 48POS .156 EYELET |
| IR21844PBF | IC DRIVER HIGH/LOW SIDE 14-DIP |
| 0210490725 | CABLE JUMPER 1.25MM .051M 5POS |
| IRS21844PBF | IC DVR HALF BRIDGE 14-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP9800DM-TS1 | 功能描述:温度传感器开发工具 MCP9800 Temp Sensor Demo Board RoHS:否 制造商:Texas Instruments 产品类型:Temperature Sensors and Control ICs 工具用于评估:MSP430G2553 接口类型:USB 工作电源电压: 工作电源电流: |
| MCP9800DM-TS1 | 制造商:Microchip Technology Inc 功能描述:TEMPERATURE SENSOR DEMO BOARD |
| MCP9801 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
| MCP9801A0-M/MS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
| MCP9801A0-M/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
发布紧急采购，3分钟左右您将得到回复。