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| 型號(hào)： | TSB41BA3AIGGM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | IEEE 1394b THREE-PORT CABLE TRANSCEIVER/ARBITER |
| 中文描述： | 的IEEE 1394b三端口電纜收發(fā)器/仲裁者 |
| 文件頁(yè)數(shù)： | 25/66頁(yè) |
| 文件大?。?/td> | 895K |
| 代理商： | TSB41BA3AIGGM |
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SLLS618B JUNE 2004 REVISED AUGUST 2004
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
Table 5. Page 0 (Port Status) Register Field Descriptions (Continued)
FIELD
SIZE
TYPE
DESCRIPTION
Max_port_speed
3
Rd/Wr
Max_port_speed
The maximum speed at which a port is allowed to operate in beta mode. The encoding is:
000 = S100
001 = S200
010 = S400
011 = S800
100 = S1600
101 = S3200
110 = reserved
111 = reserved
An attempt to write to the register with a value greater than the hardware capability of the port results
in the maximum value that the port is capable of being stored in the register. The port uses this
register only when a new connection is established in the beta mode when a port is programmed
as a beta-only port. When a port is programmed as a bilingual port, it is fixed at S400 for the beta
speed and is not updated by a write to this register. The power reset value is the maximum speed
capable of the port. Software may modify this value to force a port to train at a lower than maximum
(when in a beta-only mode), but no lower than minimum speed.
LPP
(Local_plug_present)
1
Rd
This flag is set permanently to 1.
Cable_speed
3
Rd
This variable is set to the maximum speed that the port is capable of in beta mode. The encoding
is the same as for Max_port_speed.
Connection_unreliable
1
Rd/Wr
If this bit is set to 1, then a beta mode speed negotiation has failed or synchronization has failed. A
write of 1 to this field resets the value to 0.
Beta_mode
1
Rd
Operating in beta mode. If this bit is 1, the port is operating in beta mode; it is equal to 0 otherwise
(that is, when operating in 1394a-2000 mode, or when disconnected). If Con is 1, RxOK is 1, and
Beta_mode is 0, then the port is active and operating in the 1394a-2000 mode.
Port_error
8
Rd/Wr
Incremented whenever the port receives an invalid codeword, unless the value is already 255.
Cleared when read (including being read by means of a remote access packet). Intended for use
by a single bus-wide diagnostic program.
Sleep_Flag
1
Rd
This bit is set to 1 if the port is in the sleep state. The transition to the sleep state occurs only if the
port has been enabled for the sleep mode.
Sleep_enable
1
Rd/Wr
This bit is set to 1 if the port has been enabled for sleep mode. If SLPEN pin is sampled high during
reset, then this bit is set high for all ports. If sampled low, then it is 0. Software may individually enable
or disasble sleep mode for a port by writing to this bit. Sleep mode operation is described in IDB1394
specification. In PMC mode when no link is present the sleep state of each port can be monitored
on the data lines as described in the Terminal Functions table entry for LCLK_PMC.
Loop_disable
1
Rd
This bit is set to 1 if the port has been placed in the loop disable state as part of the loop free build
process (the PHYs at either end of the connection are active, but if the connection itself were
activated, then a loop would exist). Cleared on bus reset and on disconnection.
In_standby
1
Rd
This bit is set to 1 if the port is in standby power-management state.
Hard_disable
1
Rd/Wr
No effect unless the port is disabled. If this bit is set to 1, the port does not maintain connectivity status
on an ac connection when disabled. The values of the Con and RxOK bits are forced to 0. This flag
can be used to force renegotiation of the speed of a connection. It can also be used to place the
device into a lower power state since when hard disabled, a port no longer
tones
to maintain 1394b
ac-connectivity status.
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| TSB41BA3AIPFP | 功能描述:緩沖器和線路驅(qū)動(dòng)器 Three-Port Cable Xcvr/Arbiter RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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| TSB41BA3B | 制造商:TI 制造商全稱:Texas Instruments 功能描述:IEEE 1394b THREE-PORT CABLE TRANSCEIVER/ARBITER |
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