One data bit is transferred during each clock pulse (
參數(shù)資料
型號(hào)： MPR031EPR2
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 29/33頁(yè)
文件大?。?/td> 0K
描述： IC CTLR TOUCH SENSOR 8-DFN
產(chǎn)品培訓(xùn)模塊： MPR03x - Low-Power Proximity Sensors
特色產(chǎn)品： MPR03x Proximity Capacitive Touch Sensor Controllers
標(biāo)準(zhǔn)包裝： 1
類型： 電容性
觸摸面板接口： 2 線
評(píng)估套件： 可供
數(shù)據(jù)接口： I²C，串行
數(shù)據(jù)速率/采樣率 (SPS，BPS)： 400k
電源電壓： 1.71 V ~ 2.75 V
電流 - 電源： 43µA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-UFDFN
供應(yīng)商設(shè)備封裝： 8-QFN-D（2x2）
包裝： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)面： 2808 (CN2011-ZH PDF)
配用： KITMPR03XEVM-ND - KIT EVAL FOR MPR03X
DEMOMPR031-ND - BOARD DEMO FOR MPR031 CTLR
其它名稱： MPR031EPR2DKR
MPR03X
Sensors
Freescale Semiconductor
5
2.3.3
Bit Transfer
One data bit is transferred during each clock pulse (Figure 7). The data on SDA must remain stable while SCL is high.
Figure 7. Stop and Start Conditions
2.3.4
Acknowledge
The acknowledge bit is a clocked 9th bit (Figure 8) which the recipient uses to handshake receipt of each byte of data. Thus each
byte transferred effectively requires 9 bits. The master generates the 9th clock pulse, and the recipient pulls down SDA during
the acknowledge clock pulse, such that the SDA line is stable low during the high period of the clock pulse. When the master is
transmitting to the MPR03X, the MPR03X generates the acknowledge bit, since the MPR03X is the recipient. When the MPR03X
is transmitting to the master, the master generates the acknowledge bit, since the master is the recipient.
Figure 8. Acknowledge
2.3.5
The Slave Address
The MPR03X has a 7-bit long slave address (Figure 9). The bit following the 7-bit slave address (bit eight) is the R/W bit, which
is low for a write command and high for a read command.
Figure 9. Slave Address
The MPR03X monitors the bus continuously, waiting for a START condition followed by its slave address. When a MPR03X
recognizes its slave address, it acknowledges and is then ready for continued communication.
The MPR031 and MPR032 slave addresses are show in Table 2.
Table 2.
Part Number
I2C Address
MPR031
0x4A
MPR032
0x4B
START
CONDITION
SDA
SCL
STOP
CONDITION
P
S
START
CONDITION
SDA
BY TRANSMITTER
S
12
8
9
CLOCK PULSE FOR
ACKNOWLEDGEMENT
SDA
BY RECEIVER
SCL
SDA
1
R/W
ACK
MSB
SCL
01
00
1
0
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MPR032EPR2 功能描述:電容觸摸傳感器 DFN TOUCH PAD RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
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