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参数资料
| 型号： | DEMO90121LR |
| 厂商： | Melexis Technologies NV |
| 文件页数： | 9/19页 |
| 文件大小： | 0K |
| 描述： | KIT DEMO LONG RANGE READER |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 频率： | 13.56MHz |
| 适用于相关产品： | MLX90121 |
| 已供物品： | 阅读器电路板、天线板、3 个发射应答器卡、电源、RS232 缆线、软件和文档 |
| 产品目录页面： | 571 (CN2011-ZH PDF) |
DEMO90121LR
RFID Long Range Demo User Manual
8.7 External push button
The button BUTTON1 is used to perform hardware reset of the DEMO90121LR board.
Important note: The extra button BUTTON2 is not implemented in the version 1.0 of the firmware but could
be in the next revision. Please contact your Melexis representative to get the latest revision of the firmware.
The description of the change in the revision list of the firmware will give an indication if the function has been
implemented.
R22
5V
R25
5V
8K2
D7
BAS16
8K2
RST
BUTTON1
RSTsof t
BUTTON2
C37
100NF
4
3
C45
1NF
4
3
BUTTON_RESET
BUTTON_RSTSOFT
GND_uC
GND_uC
GND_uC
GND_uC
Figure 12: Push buttons
8.8 Microcontroller ATmega8
The DEMO90121LR is controlled by an Atmel microcontroller ATmega8. It contains the firmware example
written by Melexis to handle the RFID communication and the serial communication with a computer.
The microcontroller also controls the progressive field increase (PFI) block, the external FRAM through the
SPI serial interface, the RS232/RS485 selection and the LEDs.
TX
RX
RST
RSTsof t
LEDserial
LEDmlx
MSI
DSY NC
5V
U5
5V
CLK13M
L10
short!
Y2
R18
100
short!
DOUT
CK
1
2
3
4
5
6
7
8
PD3 PC1
PD4 PC0
GND ADC7
VCC ATmega8 GND
GND ATMEGA8-16AU AREF
VCC ADC6
PB6 AVCC
PB7 PB5
24
23
22
21
20
19
18
17
485_DE
EEPROM_CS
RSSI_f il
short!
RSSI
R20
8K2
C30
short!
C31
C32
10NF
R21
13.56MHZ
C33
10NF
100NF
GND_ADC
10M
C34
C35
100NF
22PF
22PF
GND_ADC
GND_ADC
GND_ADC
GND_uC
GND_uC
SCK
MISO
GND_uC
DIN
MOSI
RTB
MODE
RS232_485
PFI
LEDgeneral
Figure 13: Microcontroller ATmega8
390129012104
Rev 003
Page 9 of 19
User Manual
Dec. 2009
相关PDF资料 |
PDF描述 |
|---|---|
| DEMOFLEXISJMSD | CARD READER M9S08JM60 |
| DF3GD | LIGHT BAR 565NM GREEN 6.8X19.9MM |
| DF3ID | LIGHT BAR 627NM HERED 6.8X19.9MM |
| DF3SGD | LIGHT BAR 565NM GREEN 6.8X19.9MM |
| DF3SRD | LIGHT BAR 660NM RED 6.8X19.9MM |
相关代理商/技术参数 |
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| DEMO908GZ60 | 功能描述:开发板和工具包 - S08 / S12 908GZ60 DEMO BOARD RoHS:否 产品:Development Kits 工具用于评估:MC9S12G128 核心:S12 接口类型:CAN, LIN, RS-232, USB 工作电源电压:5 V 制造商:Freescale Semiconductor |
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