收藏本站
MCP2030 Bidirectional Communication Demo Kit User’s Guide
3.2.5
125 kHz Low Frequency Command Initiator
The 125 kHz PWM from the PIC18F4680 is power boosted by the MOS FET driver
(TC4422). The PWM square pulse becomes a sine wave as the current passes through
the LC series resonant circuit formed by L1 and C2, C3, and C4 on the Base Station
Demo Board. The current that is passing through the L1 generates a magnetic field.
When this magnetic field transmitted from the Base Station Demo Board is passing
through the Transponder Demo Board’s antenna coil, it produces a voltage. This
voltage is detected by the MCP2030 LF front-end device and the information carried on
the voltage is processed by the PIC16F636 microcontroller on the transponder.
See Recommended Reading for more details of the near-field magnetic coupling
principles.
3.2.6
Power
Power can be supplied through J1 power jack. The voltage should be in the range of
9 - 18 VDC with a current rating greater than 500 mA.
3.2.7
MCU FIRMWARE ALGORITHM
The bidirectional communication method between the Base Station Demo Board and
Transponder Demo Board is shown in Figure 2-2 . The Base Station Demo Board sends
an LF command, receives the responses from the Transponder Demo Board, and dis-
plays the received responses on the LCD. The Base Station Demo Board repeats the
transmitting and receiving functions as long as its power supply is connected.
Figure 3-1 shows the LF command data format and waveform. The receiving data for-
mat is shown in Figure 3-5 . The MCU firmware for the communication algorithm is
included on the MCP2030 Bidirectional Communication Demo Kit CD ROM.
AGC Stabilization Time
Gap
Wake-Up Filter
Command Type
+ Continuous LF
Waiting for Response
4 ms
High Duration
500 ms
2 ms 2 ms 3C+Parity + Stop bit
High Duration Low Duration +LF turns-on for 50 ms
32 bit ID+RSSI+Parity Bits
(Parity bit per byte)
Transmitting Data: LSB First
Receiving Data: LSB First
AGC Stabilization Time
Gap
Wake-Up Filter
Command Type (3C)
= 1100 0011P
= LSB first of 3C (hex)
Stop bit
Continuous LF Field
This allows the Transponder
to sample the RSSI data
DS51637A-page 12
FIGURE 3-1:
Base Station Demo Board LF Command Data Format.
? 2006 Microchip Technology Inc.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MCP9502PT-095E/OT IC TEMP SWITCH PROGR P-P SOT23-5
MCP9510CT-E/CH IC TEMP SWITCH OD 125C SOT23-6
MD7IC18120NR1 IC PWR AMP RF LDMOS TO270-16
MDEV-315-HH-KF-MS KIT MASTER DEV MS KEYFOB 315MHZ
MDEV-418-HH-CP8-HS KIT DEV TX 418MHZ HS COMPACT
MDEV-418-HH-LR8-HS KIT DEV TX 418MHZ HS LONG-RANGE
MDEV-433-HH-CP8-MS KIT DEV TX 433MHZ MS SERIES
MDEV-433-HH-LR8-MS KIT DEV TX 433MHZ MS SER LONG-RG
相关代理商/技术参数
MCP2030-I/P 功能描述:射频无线杂项 Keyless Entry AFE RoHS:否 制造商:Texas Instruments 工作频率:112 kHz to 205 kHz 电源电压-最大:3.6 V 电源电压-最小:3 V 电源电流:8 mA 最大功率耗散: 工作温度范围:- 40 C to + 110 C 封装 / 箱体:VQFN-48 封装:Reel
MCP2030-I/P 制造商:Microchip Technology Inc 功能描述:Analog Front End Device IC
MCP2030-I/SL 功能描述:射频无线杂项 Keyless Entry AFE RoHS:否 制造商:Texas Instruments 工作频率:112 kHz to 205 kHz 电源电压-最大:3.6 V 电源电压-最小:3 V 电源电流:8 mA 最大功率耗散: 工作温度范围:- 40 C to + 110 C 封装 / 箱体:VQFN-48 封装:Reel
MCP2030-I/ST 功能描述:射频无线杂项 Keyless Entry AFE RoHS:否 制造商:Texas Instruments 工作频率:112 kHz to 205 kHz 电源电压-最大:3.6 V 电源电压-最小:3 V 电源电流:8 mA 最大功率耗散: 工作温度范围:- 40 C to + 110 C 封装 / 箱体:VQFN-48 封装:Reel
MCP2030T 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Three-Channel Analog Front-End Device
MCP2030T-I/P 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Three-Channel Analog Front-End Device
MCP2030T-I/SL 功能描述:射频无线杂项 Keyless Entry AFE RoHS:否 制造商:Texas Instruments 工作频率:112 kHz to 205 kHz 电源电压-最大:3.6 V 电源电压-最小:3 V 电源电流:8 mA 最大功率耗散: 工作温度范围:- 40 C to + 110 C 封装 / 箱体:VQFN-48 封装:Reel
MCP2030T-I/ST 功能描述:射频无线杂项 Keyless Entry AFE RoHS:否 制造商:Texas Instruments 工作频率:112 kHz to 205 kHz 电源电压-最大:3.6 V 电源电压-最小:3 V 电源电流:8 mA 最大功率耗散: 工作温度范围:- 40 C to + 110 C 封装 / 箱体:VQFN-48 封装:Reel