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參數資料
| 型號： | MC33690 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Standalone Tag Reader Circuit |
| 中文描述： | 獨立標簽讀寫器電路 |
| 文件頁數： | 12/24頁 |
| 文件大小： | 442K |
| 代理商： | MC33690 |
Go to: www.freescale.com
revision 4.8, 5 February 2002
Motorola, Inc., 2002.
STANDALONE CONFIGURATION WITH TWO WIRES BUS
When a low level is applied on MODE1 and a
high level on MODE2, the circuit is in
configuration B
(standalone 2 wires bus
configuration, see figure 14 page 19).
The K pin is set as an output sending the
demodulated data.
The AM pin is set as a VSUP referenced input pin
receiving the amplitude modulation and the
shutdown/wake-up commands. Forcing high and
low levels on AM achieves the amplitude
modulation by switching on/off both antenna
drivers. Meanwhile, this amplitude modulation
can be monitored on the K output. This allows
antenna short and open circuit diagnosis.
The circuit can be put into
standby mode
by
forcing the AM line at zero during more than 2
ms. The circuit sends an acknowledge pulse
before entering into standby mode
In standby mode, the oscillator and most of the
internal biasing currents are switched off.
Therefore, the functions (tag reader, ISO 9141
driver) are inactive except the voltage regulator
and the ISO 9141 receiver on pin AM. The driver
output TD1 forces a low level and TD2 a high
level. A rising edge on AM wakes up the circuit.
After completion of the wake-up sequence, the
circuit is automatically set in read mode.
In configuration B, DOUT and Rx outputs always
force a low level, Tx is disabled.
Figure 8 : Modes access description in two wires bus configuration
Figure 9 : Configuration B state diagram
AM line
1
0
0
0
1
1
data read
drivers off
AM line
t
≥
T1
standby mode
Read & write sequences :
1
0
0
0
1
1
K line
Entering into standby mode :
K line
data write modulation
data write
AM line monitoring
drivers on
wake-up sequence
data read
T2
T2
T1
Coming out of standby mode :
AM line
K line
standby mode
acknowledge
TD1/2 off
TD1/2
switching
standby
AM line high
wake up
AM line low
T1
≤
AM line low
reset
AM line high
AM line low
AM
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
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相關代理商/技術參數 |
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| MC33690DWE | 功能描述:數字信號處理器和控制器 - DSP, DSC STAND ALONE TAG READER RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數:50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MC33690DWER2 | 功能描述:數字信號處理器和控制器 - DSP, DSC STAND ALONE TAG READER RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數:50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MC33696FCAE | 功能描述:射頻收發器 UHF TRANSCEIVER RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數據速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| MC33696FCAER2 | 功能描述:射頻收發器 UHF TRANSCEIVER ECHO RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數據速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| MC33696FCE | 功能描述:射頻收發器 PLL Tuned UHF Recvr RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數據速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
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