收藏本站
9XTend ‐ PKG ‐ E? ? Ethernet ? RF ? Modem ? – ? Product ? Manual ? v2.x4x ? [2007.01.04]
4.4. API Operation
By default, XTend RF Modems act as a serial line replacement (Transparent Operation) - all UART
data received through the DI pin is queued up for RF transmission. When the modem receives an
RF packet, the data is sent out the DO pin with no additional information.
Inherent to Transparent Operation are the following behaviors:
? If modem parameter registers are to be set or queried, a special operation is required for
transitioning the modem into Command Mode [refer to p18].
? In point-to-multipoint systems, the application must send extra information so that the
receiving modem(s) can distinguish between data coming from different remotes.
As an alternative to the default Transparent Operation, API (Application Programming Interface)
Operations are available. API operation requires that communication with the modem be done
through a structured interface (data is communicated in frames in a defined order). The API spec-
ifies how commands, command responses and modem status messages are sent and received
from the modem using a UART Data Frame.
4.4.1. API Frame Specifications
Two API modes are supported and both can be enabled using the AP (API Enable) command. Use
the following AP parameter values to configure the modem to operate in a particular mode:
? AP = 0 (default): Transparent Operation (UART Serial line replacement)
API modes are disabled.
? AP = 1: API Operation
? AP = 2: API Operation (with escaped characters)
Any data received prior to the start delimiter is silently discarded. If the frame is not received cor-
rectly or if the checksum fails, the data is silently discarded.
API Operation (AP parameter = 1)
When this API mode is enabled (AP = 1), the UART data frame structure is defined as follows:
Figure ? 4 ‐ 03. UART ? Data ? Frame ? Structure:
Start Delimiter
(Byte 1)
Length
(Bytes 2-3)
Frame Data
(Bytes 4-n)
Checksum
(Byte n + 1)
0x7E
MSB
LSB
API-specific Structure
1 Byte
MSB ? = ? Most ? Significant ? Byte, ? LSB ? = ? Least ? Significant ? Byte
API Operation - with Escape Characters (AP parameter = 2)
When this API mode is enabled (AP = 2), the UART data frame structure is defined as follows:
Figure ? 4 ‐ 04. UART ? Data ? Frame ? Structure ?‐? with ? escape ? control ? characters:
Start Delimiter
(Byte 1)
Length
(Bytes 2-3)
Frame Data
(Bytes 4-n)
Checksum
(Byte n + 1)
0x7E
MSB
LSB
API-specific Structure
1 Byte
Characters Escaped If Needed
MSB ? = ? Most ? Significant ? Byte, ? LSB ? = ? Least ? Significant ? Byte
Escape characters . When sending or receiving a UART data frame, specific data values must be
escaped (flagged) so they do not interfere with the UART or UART data frame operation. To escape
an interfering data byte, insert 0x7D and follow it with the byte to be escaped XOR’d with 0x20.
? ? 2007 ? MaxStream, ? Inc., ? Confidential ? & ? Proprietary ?‐? All ? Rights ? Reserved ?
????? 42
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
XT09-SI MODULE RF 900MHZ 1W 115K W/RPSMA
XU-A11 X-STICK 2.4GHZ USB TO XBEE
XV-8000CB :3 50.3000KHZ+/-60DPS AUTOMOTIVE GYRO SENSOR +/-60DPS
YB03WKW01-6B-JB INDICATOR PB RECT WHT LED ILLUM
YGM1 C518 THERM PTC MINI-BEAD 3MM 180C
YQD120N0006 THERMISTOR PTC OCP 6 OHM 25C
Z4D-A01 PHOTO SENSOR 7.5MM REFLECT TYPE
ZALM-301-1C-B RF TRANSCEIVER 100MW MMCX W/CONN
相关代理商/技术参数
XT09-PKI-E-NA 功能描述:射频模块 9XTend 1W Ethernet w/o accessories Intl RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-R 功能描述:射频模块 9XTend 1W RS232/485 w/o accessories RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-RA 功能描述:射频模块 900MHz - Xtend software setable RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-RA-NA 功能描述:射频模块 9XTend 1W RS232/485 w/accessories no AES RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-RDA 功能描述:射频模块 XTend-PKG 900 MHz IndRS-232class1/div2 RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-R-NA 功能描述:射频模块 9XTend 1W RS232/485 w/o accessories Intl RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-R-NL 制造商:Digi International Inc 功能描述:MODEM RF 900MHZ 9600/11
XT09-PKT-R 功能描述:MODEM RF 900MHZ RS232/485 RoHS:是 类别:RF/IF 和 RFID >> RF 接收器、发射器及收发器的成品装置 系列:XTend™ 标准包装:5 系列:MultiModem® iCell 功能:收发器，HSPA，调制解调器 调制或协议:GPRS，GSM，EDGE 频率:850MHz，900MHz，1.8GHz，1.9GHz 应用:- 接口:RS-232，USB 灵敏度:- 功率 - 输出:- 数据传输率 - 最大:7.2 Mbps 特点:- 电源电压:9 V ~ 32 V，USB 其它名称:881-1125