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參數(shù)資料
| 型號： | PCI4510PDV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PC CARD AND INTEGRATED 1394A-2000 OHCI TWO PORT PHY/LINK LAYER CONTROLLER |
| 中文描述： | PC卡和綜合1394A端口- 2000 OHCI的兩個端口物理層/鏈路層控制器 |
| 文件頁數(shù)： | 203/220頁 |
| 文件大?。?/td> | 1356K |
| 代理商： | PCI4510PDV |
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103
Table 102. Base Register Field Descriptions (Continued)
FIELD
SIZE
TYPE
DESCRIPTION
ISBR
1
R/W
Initiate short arbitrated bus reset. This bit, if set to 1, instructs the PHY layer to initiate a short (1.3
μ
s)
arbitrated bus reset at the next opportunity. This bit is cleared to 0 by a bus reset.
NOTE: Legacy IEEE Std 1394-1995 compliant PHY layers can not be capable of performing short bus
resets. Therefore, initiation of a short bus reset in a network that contains such a legacy device results in a
long bus reset being performed.
Loop
1
R/W
Loop detect. This bit is set to 1 when the arbitration controller times out during tree-ID start and may indicate
that the bus is configured in a loop. This bit is cleared to 0 by system (hardware) reset or by writing a 1 to this
register bit.
If the loop and watchdog bits are both set and the LLC is or becomes inactive, the PHY layer activates the
LLC to service the interrupt.
NOTE: If the network is configured in a loop, only those nodes which are part of the loop generate a
configuration-timeout interrupt. All other nodes instead time out waiting for the tree-ID and/or self-ID process
to complete and then generate a state time-out interrupt and bus-reset.
Pwr_fail
1
R/W
Cable power failure detect. This bit is set to 1 whenever the CPS input transitions from high to low indicating
that cable power may be too low for reliable operation. This bit is cleared to 0 by system (hardware) reset or
by writing a 1 to this register bit.
Timeout
1
R/W
State time-out interrupt. This bit indicates that a state time-out has occurred (which also causes a bus reset
to occur). This bit is cleared to 0 by system (hardware) reset or by writing a 1 to this register bit.
Port_event
1
R/W
Port event detect. This bit is set to 1 upon a change in the bias (unless disabled) connected, disabled, or fault
bits for any port for which the port interrupt enable (Int_enable) bit is set. Additionally, if the watchdog bit is
set, the Port_event bit is set to 1 at the start of resume operations on any port. This bit is cleared to 0 by
system (hardware) reset or by writing a 1 to this register bit.
Enab_accel
1
R/W
Enable accelerated arbitration. This bit enables the PHY layer to perform the various arbitration acceleration
enhancements defined in IEEE Std 1394a-2000 (ACK-accelerated arbitration, asynchronous fly-by
concatenation, and isochronous fly-by concatenation). This bit is cleared to 0 by system (hardware) reset
and is unaffected by bus reset.
Enab_multi
1
R/W
Enable multispeed concatenated packets. This bit enables the PHY layer to transmit concatenated packets
of differing speeds in accordance with the protocols defined in IEEE Std 1394a-2000. This bit is cleared to 0
by system (hardware) reset and is unaffected by bus reset.
Page_Select
3
R/W
Page_Select. This field selects the register page to use when accessing register addresses 8 through 15.
This field is cleared to 0 by a system (hardware) reset and is unaffected by bus reset.
Port_Select
4
R/W
Port_Select. This field selects the port when accessing per-port status or control (for example, when one of
the port status/control registers is accessed in page 0). Ports are numbered starting at 0. This field is cleared
to 0 by system (hardware) reset and is unaffected by bus reset.
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