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參數(shù)資料
| 型號： | TRF7960RHBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數(shù)： | 37/52頁 |
| 文件大小： | 1023K |
| 代理商： | TRF7960RHBT |
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WriteMode
CKPH – 1,CKPL – 0(MSP430)
Data Transition – SCLKFallingEdge
MOSIValid – SCLKRisingEdge
Switch
SCLK
Polarity
ReadMode
CKPH – 0,CKPL – 0(MSP430)
Data Transition – SCLKRisingEdge
MISOValid – SCLKFallingEdge
SingleReadOperation
SCLK
MOSI
MISO
SS*
Write AddressByte
ReadDataByte
B7
B6
B5
B4
B3
B2
B1
B0
Don'tCare
NoData Transitions(AllHigh/Low)
SLOU186F – AUGUST 2006 – REVISED AUGUST 2010
www.ti.com
The SPI read operation is shown in Figure 5-10.
Figure 5-10. Serial – SPI Interface Communication (Read Mode)
The read command is sent out on the MOSI pin, MSB first, in the first eight clock cycles. MOSI data
changes on the falling edge, and is validated in the reader on the rising edge, as shown in Figure 5-10.
During the write cycle, the serial data out (MISO) is not valid. After the last read command bit (B0) is
validated at the eighth rising edge of SCLK, after half a clock cycle, valid data can be read on the MISO
pin at the falling edge of SCLK. It takes eight clock edges to read out the full byte (MSB first).
Note:
When using the hardware SPI (for example, an MSP430 hardware SPI) to implement the foregoing
feature, care must be taken to switch the SCLK polarity after write phase for proper read operation.
The example clock polarity for the MSP430-specific environment is shown in the write-mode and
read-mode boxes of Figure 5-10. See the USART-SPI chapter for any specific microcontroller family
for further information on the setting the appropriate clock polarity.
This clock polarity switch must be done for all read (single, continuous) operations.
The MOSI (serial data out) should not have any transitions (all high or all low) during the read cycle. Also,
the SS* should be low during the whole write and read operation.
The continuous read operation is illustrated in Figure 5-11
42
System Description
Copyright 2006–2010, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TRF7960RHBT | 制造商:Texas Instruments 功能描述:RFID Reader IC 制造商:Texas Instruments 功能描述:IC, RFID READER, 13.56MHZ, QFN-32 |
| TRF7960RHBTG4 | 功能描述:RFID應(yīng)答器 Mulit-Standard High Freq RFID Read/Writ RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| TRF7960TB | 功能描述:射頻識別變換器工具 TRF7960 Target Board RoHS:否 制造商:Olimex Ltd. 產(chǎn)品:RFID Readers 用于:ISO15693 |
| TRF7961 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Multi-Standard Fully Integrated 13.56-MHz Radio Frequency Identification (RFID) Analog Front End and Data Framing Reader System |
| TRF7961RHBR | 功能描述:RFID應(yīng)答器 Multi-Standard High Freq RFid Reader RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
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