- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373540 > T9000 ISDN Network Termination Node (NTN) Device PDF資料下載
參數(shù)資料
| 型號(hào)： | T9000 |
| 英文描述： | ISDN Network Termination Node (NTN) Device |
| 中文描述： | ISDN網(wǎng)絡(luò)終端節(jié)點(diǎn)（新界北）設(shè)備 |
| 文件頁(yè)數(shù)： | 77/126頁(yè) |
| 文件大?。?/td> | 2127K |
| 代理商： | T9000 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)當(dāng)前第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)
Lucent Technologies Inc.
77
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
T9000
10 GCI+ Interface Module
(continued)
10.3 GCI-NT Mode (GCCF[GMODE(1:0)] = 00)
(continued)
10.3.2 Monitor Message Transfer
For both GCI-NT and GCI-TE modes, the NTN man-
ages the monitor channel (MON) protocol as defined
by the GCI standard. In GCI-NT mode, monitor data
transfer occurs in time slot 2 (MON-0) using the A&E
bit pair in time slot 3. In GCI-TE mode, monitor data
transfer occurs in time slot 6 (MON-1) using the A&E
bit pair in time slot 7.
Monitor messages may be one or more bytes in length.
To transmit a single byte message downstream, the
microcontroller writes the monitor byte into the GCDML
register. Once this byte is internally loaded, the GCI-
controller asserts the interrupt bit GCIR[DMRDY] indi-
cating to the microcontroller that it is ready to accept a
new message to be transmitted. If the transmission is
successfully completed, the GCI controller asserts
interrupt bit GCIR[DMEOM]. Otherwise, if the transmis-
sion has been aborted, it will assert interrupt bit
GCIR(DMABRT). Downstream monitor message
aborts may occur as a consequence of an abort
request by the downstream device or an expiration of
the GCI controller downstream timer (if
GCOF1[GTMODE] = 1).
Multibyte monitor messages operate in a similar man-
ner to single-byte messages, except that for an N-byte
message, bytes 1 to N – 1 are written into register
GCDMD, and the last monitor byte is written into regis-
ter GCDML. The interrupt bit GCIR[DMRDY] is used in
both cases to signify when new downstream data may
be written to either GCDMD or GCDML.
Upstream monitor bytes, when confirmed, are trans-
ferred to the GCUMD register. Interrupt bit
GCIR[UMRDY] is asserted to indicate a new monitor
byte has been successfully received. At the completion
of an upstream message, interrupt bit GCIR[UMEOM]
is asserted. If the upstream message is aborted, the
interrupt bit GCIR [UMABRT] is asserted. Upstream
monitor message aborts may occur as a consequence
of an implicit abort produced by an invalid upstream
A&E bit pair sequence (normally produced by the
downstream device) or an expiration of the GCI con-
troller upstream timer (if GCOF1[GTMODE] = 1).
The embedded GCI controller has one timer associ-
ated with each monitor direction to avoid deadlock situ-
ations. Both timers may be enabled by setting
GCOF1[GTMODE] = 1. The downstream timer will be
started each time the transfer of a downstream monitor
byte is initiated. If the byte is not acknowledged within
four frames, the timer will expire and generate an abort
request. The upstream timer will be started upon the
detection of a new byte. If this byte is not confirmed by
the far end (because it did not detect identical bytes in
two consecutive frames—upstream RNR event) or the
byte cannot be transferred to the GCUMD register
(because the microcontroller has not yet read the previ-
ous byte—upstream RNR event), the timer will expire.
10.4 C/I Message Transfer
For both GCI-NT and GCI-TE modes, the NTN man-
ages data transfer over the command/indication chan-
nel as defined by the GCI standard. In GCI-NT mode,
C/I data transfer occurs in the first 6 bits of time slot 3
(C/I-0). In GCI-TE mode, C/I data transfer occurs in the
first 6 bits of time slot 7 (C/I-1).
To transmit a downstream C/I code, the microcontroller
writes the code into the GCDCI register. This code will
be continuously transmitted until a new code is written
to GCDCI. The internal GCI controller will not read the
new code from GCDCI until the current code has been
transferred in at least two consecutive frames.
Upstream command/indication codes are first filtered
before they are transferred to the GCUCI register. A
double last look criterion is used to validate a new C/I
code, i.e., a new code is transferred to the GCUCI reg-
ister only if it is different from the previously loaded
value and is received in two consecutive GCI frames.
Whenever this happens, the GCIR[UCIC] interrupt is
asserted.
10.5 GCI+ Powerdown Mode
The GCI+ may be placed in a powerdown mode by set-
ting GCCF[GRATE(1:0)] = 00). Prior to enabling power-
down mode, the user must set DFR[PFS1_ACT] = 0
and DFR[PFS2_ACT] = 0. While in powerdown mode,
the DCL clock signal is stopped (held low), the PFS1
and PFS2 signals are held low, and the DD signal is
3-stated.
When in powerdown, a falling edge on the DU signal
causes an assertion of the interrupt bit GCIR[GWUP].
This allows the user to write a powerup routine for the
GCI+ interface.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| T9021 | TELECOMMUNICATIONS PRODUCTS |
| T9030 | TELECOMMUNICATIONS PRODUCTS |
| T90FJR | Dual Common Interface Hardware Controller- CIMax |
| T919N | PHASE CONTROL THYRISTORS |
| T9790U | CMOS 1 CHIP LSI FOR LCD ELECTRONIC CALCULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T9001 | 功能描述:罩類、盒類及殼類產(chǎn)品 15x14x3-1/2(3.13cf) 1 Compartment RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red |
| T9006 | 功能描述:罩類、盒類及殼類產(chǎn)品 15 x 14 x 3-1/2 (2.96cf) RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red |
| T9007 | 功能描述:罩類、盒類及殼類產(chǎn)品 13 1/8 x 13 1/8 x 3" 6 COMPARTMENTS RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red |
| T9008 | 制造商:Nortools International Ltd 功能描述:HSS METRIC DIE SET,M3-M12 |
| T900BK | 功能描述:罩類、盒類及殼類產(chǎn)品 of Box Dividers Clear RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。