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参数资料
| 型号： | TSS461E-TRDZ-9 |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | VAN Data Link Controller |
| 中文描述： | 1 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDSO24 |
| 封装： | SO-24 |
| 文件页数： | 14/57页 |
| 文件大小： | 817K |
| 代理商： | TSS461E-TRDZ-9 |
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14
TSS461E
4194B–AUTO–12/04
The IFS is defined to be a minimum of 64 prescaled clocks periods. The TSS461E,
accepts an IFS of zero prescaled clocks for the reception only of a SOF sequence.
Once the bus is free, the module must now, if it is an autonomous module emits a SOF
sequence or, if it is a synchronous access module, wait until it detects a preamble
sequence.
Up till this point there can be several modules transmitting on the bus, and there is no
possibility of knowing if this is the case or not. Therefore, the first field in which arbitra-
tion can be performed is the identifier field. Since the logical zeroes on the bus are
dominant, and all data is transmitted with the most significant bit (MSB) first, the first
module to transmit a logical zero on the bus will be the prioritized module, i.e., the mes-
sage that is tagged with the lowest identifier will have priority over the other messages.
However it is possible that two messages transmitted on the bus will have the same
identifier. The TSS461E therefore, continues the arbitration of the bus throughout the
whole frame. In addition, if the identifier in transmission has been programmed for
reception as well, it transmits and receives messages simultaneously, right up till the
Frame Check Sequence (FCS). Only then, if the TSS461E has transmitted the whole
message. It discards the message received. Arbitration loss in the FCS field is consid-
ered as a CRC error during transmission.
This feature is called full data field arbitration, and it enables the user to extend the iden-
tifier. For instance, it can be used to transmit the emitting modules address in the first
bytes of the data field, thus enabling the identifier to specify the contents of the frame
and the data field to specify the source of the information.
The identifier field of the VAN bus frame is always 12 bits long, and it is always followed
by the 4-bit command field:
The first bit of the command is the extension bit (EXT). This bit is defined by the
user on transmission and is received and retained by the TSS461E. To conform with
the standard, it should be set to 1 (recessive) by the user, else the frame is ignored
without any IT generation.
The second bit is the request ACKnowledge bit (RAK). If this bit is a logical one, the
receiving module must acknowledge the transfer with an in-frame
acknowledgement in the ACK field. If it is set to logical zero, then the ACK field must
contain an acknowledge absent sequence.
The third bit is the Read/Write bit (R/W). This bit indicates the direction of the data in
a frame.
If set to zero it is a "write" message, i.e. data transmitted by one module to be
received by another module. If it is set to one it implies a "read" message, i.e., a
request that another module should transmit data to be received by the one that
requested the data (reply request message).
Last in the command field is the Remote Transmission Request bit (RTR). This bit is
a logical zero if the frame contains data and a logical one if the frame does not
contain data. In order to conform with the standard a received frame included the
combination R/W. RTR = 01 is ignored without any IT generation.
All the bits in the command field are automatically handled by the TSS461E, so the user
doesn’t need to be concerned for the encoding and decoding of these. The command
bits transmitted on the VAN bus are calculated from the current status of the active
message.
相关PDF资料 |
PDF描述 |
|---|---|
| TSS461F | VAN Data Link Controller |
| TSS463-AAR | VAN Data Link Controller with Serial Interface |
| TSS463A-TERZ | VAN Data Link Controller with Serial Interface |
| TSS463C | VAN Data Link Controller with Serial Interface |
| TSS4B02G | Single Phase 4.0 Amps. Glass Passivated Super Fast Bridge Rectifiers |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TSS461F | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:VAN Data Link Controller |
| TSS461F-TDRZ-9 | 功能描述:网络控制器与处理器 IC Van Data Link Controller RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| TSS461F-TDSZ-9 | 功能描述:网络控制器与处理器 IC ASICS RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| TSS463 | 制造商:Atmel Corporation 功能描述:LAN Node Controller, 16 Pin, SOP 制造商:Temic 功能描述:LAN Node Controller, 16 Pin, SOP |
| TSS463-AA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TSS463-AA [Updated 3/03. 60 Pages] |
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