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參數(shù)資料
| 型號(hào)： | SAB82525N |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 4M bps, MULTI PROTOCOL CONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 48/126頁 |
| 文件大?。?/td> | 730K |
| 代理商： | SAB82525N |
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Semiconductor Group
28
82525
82526
82525
82526
SAB
SAF
When operating in the auto-mode, the HSCX offers a high degree of procedural support. In
addition to address recognition, the HSCX autonomously processes all (numbered) S- and
I-frames (prerequisite window size 1) with either normal or extended control field format
(modulo 8 or modulo 128 sequence numbers – selectable via RAH2 register).
3
Procedural Support (Layer-2 Functions)
updating of transmit and receive counter
–
evaluation of transmit and receive counter
–
In addition, all unnumbered frames are forwarded directly to the processor.
The following functions will be performed:
processing of S commands
–
flow control with RR/RNR
–
generation of responses
–
transmitting of S commands, if acknowledgement is missing
–
continuous status query of opposite termination after RNR has been received
–
programmable timer/repeater functions.
–
recognition of protocol errors
–
Additional logic connections can be operated in parallel by software. The logic link can be
initialized by software at any time (RHR).
Initially (i.e. after RESET), the LAP controllers of the two serial channels are configured to
function as a combined station, where they autonomously perform a subset of the X.25 LAPB/
ISDN LAPD protocol.
3.1 Full-Duplex LAPB/LAPD Operation
The logic processing of received S-frames is performed by the HSCX without interrupting the
C. The C is merely informed by interrupt with respect to status changes in the opposite
station (receive ready/not receive ready) and protocol errors (unacceptable N(R) or S-frame
with I field).
Reception of Frames
I-frames are also processed autonomously and checked for protocol errors. The I-frame will
not be accepted in the case of N(s) error (no interrupt is forwarded to the
C), but is
immediately confirmed by an S response. If the
C sets the HSCX into a "receive not ready"
status, an I-frame will not be accepted (no interrupt) and an RNR response is transmitted.
U-frames are always stored in the RFIFO and forwarded directly to the
C. The logic sequence
and the reception of a frame in the auto-mode is illustrated in figure 10.
Note: The state variables N(S), N(R) are evaluated within the window size, i.e. the HSCX
checks only the Isb of the receive and transmit counter regardless of the selected
modulo count.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAB82525N-V2.1 | 制造商:Siemens 功能描述:82525N-V2.1 |
| SAB82525NV2.1GHSCX | 制造商:Infineon Technologies AG 功能描述: |
| SAB82525N-V2.1GHSCX | 制造商:Infineon Technologies AG 功能描述: |
| SAB82525NV2.1HSCX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SAB82525NV2.2 | 功能描述:輸入/輸出控制器接口集成電路 T/E RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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