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參數(shù)資料
| 型號(hào)： | MC33690 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Standalone Tag Reader Circuit |
| 中文描述： | 獨(dú)立標(biāo)簽讀寫器電路 |
| 文件頁數(shù)： | 10/24頁 |
| 文件大?。?/td> | 442K |
| 代理商： | MC33690 |
Go to: www.freescale.com
revision 4.8, 5 February 2002
Motorola, Inc., 2002.
STANDALONE CONFIGURATION WITH ONE WIRE BUS
When a low level is applied on pins MODE1
and MODE2, the circuit is in
configuration A
(standalone single wire bus configuration, see
figure 13 page 18).
After power on, the circuit is set into
read mode
.
The demodulator output is directly routed to the
ISO 9141 interface output K.
The circuit can be set into
write mode
at anytime
by violation of all possible patterns on the single
wire bus during more than 1ms. Then the K line
achieves the amplitude modulation by switching
on/off both antenna drivers.
After 1ms of inactivity at the end of the challenge
phase (bus in idle recessive one state), the circuit
is set back into read mode.
The circuit can be put into
standby mode
by
forcing the K line at zero during more than 2 ms
after entering the write mode. Once the K line is
released, 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 K. The driver
output TD1 forces a low level and TD2 a high
level. A rising edge on K wakes up the circuit.
After completion of the wake-up sequence, the
circuit is automatically set in read mode.
In configuration A, DOUT and Rx outputs always
force a low level, Tx is disabled.
Figure 6 : Mode access description in one wire bus configuration
Read to write mode :
Figure 7 : Configuration A state diagram
T
0
≤
K line low
K line
T
0
≤
t
<
T
0
’
+T
1
’
1
0
0
0
1
1
read mode
write mode
K line
t
≥
T
0
read mode
write mode
K line
t
≥
T
1
standby mode
write mode
Write to read mode :
Write to standby mode :
Standby mode to read mode :
standby mode
read mode
wake-up sequence
K line
acknowledge
T
2
T
2
read
write
TD1/2
switching
write
TD1/2 off
standby
K line high
<
T
0
’
T
1
≤
K line low
T
0
≤
K line high
wake up
K line low
reset
K
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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| MC33690DWE | 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC STAND ALONE TAG READER RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):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(fēng)格:SMD/SMT |
| MC33690DWER2 | 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC STAND ALONE TAG READER RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):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(fēng)格:SMD/SMT |
| MC33696FCAE | 功能描述:射頻收發(fā)器 UHF TRANSCEIVER RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)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(fā)器 UHF TRANSCEIVER ECHO RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)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(fā)器 PLL Tuned UHF Recvr RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)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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