參數(shù)資料
型號(hào): XIO2200AZGW
廠商: Texas Instruments
文件頁(yè)數(shù): 33/202頁(yè)
文件大?。?/td> 0K
描述: IC PCI-EXPRESS/BUS BRIDGE 176BGA
產(chǎn)品培訓(xùn)模塊: PCI Express Basics
標(biāo)準(zhǔn)包裝: 126
應(yīng)用: PCI Express 至 PCI 轉(zhuǎn)換橋
接口: PCI
電源電壓: 1.35 V ~ 1.65 V,3 V ~ 3.6 V
封裝/外殼: 176-LFBGA
供應(yīng)商設(shè)備封裝: 176-BGA MICROSTAR(15x15)
包裝: 托盤
安裝類型: 表面貼裝
產(chǎn)品目錄頁(yè)面: 882 (CN2011-ZH PDF)
配用: XIO2200AEVM-ND - XIO2200AEVM
其它名稱: 296-19567
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1394 OHCI—PCI Configuration Space
115
March 5 2007 June 2011
SCPS154C
7.4
Status Register
The status register provides status over the OHCI controller interface to the PCI bus. All bit functions adhere
to the definitions in the PCI Local Bus Specification, as seen in the following bit descriptions. See Table 73
for a complete description of the register contents.
PCI register offset:
06h
Register type:
Read/Clear/Update, Read-only
Default value:
0230h
BIT NUMBER
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET STATE
0
1
0
1
0
Table 73. Status Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
15
PAR_ERR
RCU
Detected parity error. Bit 15 is set to 1b when either an address parity or data parity error is detected.
14
SYS_ERR
RCU
Signaled system error. Bit 14 is set to 1b when PCI_SERR is enabled and the OHCI controller has
signaled a system error to the host.
13
MABORT
RCU
Received master abort. Bit 13 is set to 1b when a cycle initiated by the OHCI controller on the PCI bus
has been terminated by a master abort.
12
TABORT_REC
RCU
Received target abort. Bit 12 is set to 1b when a cycle initiated by the OHCI controller on the PCI bus
was terminated by a target abort.
11
TABORT_SIG
RCU
Signaled target abort. Bit 11 is set to 1b by the OHCI controller when it terminates a transaction on the
PCI bus with a target abort.
109
PCI_SPEED
R
DEVSEL timing. Bits 10 and 9 encode the timing of PCI_DEVSEL and are hardwired to 01b, indicating
that the OHCI controller asserts this signal at a medium speed on nonconfiguration cycle accesses.
8
DATAPAR
RCU
Data parity error detected. Bit 8 is set to 1b when the following conditions have been met:
a. PCI_PERR was asserted by any PCI device including the OHCI controller.
b. The OHCI controller was the bus master during the data parity error.
c. Bit 6 (PERR_EN) in the command register at offset 04h in the PCI configuration space
(see Section 7.3, Command Register) is set to 1b.
7
FBB_CAP
R
Fast back-to-back capable. The OHCI controller cannot accept fast back-to-back transactions;
therefore, bit 7 is hardwired to 0b.
6
UDF
R
User-definable features (UDF) supported. The OHCI controller does not support the UDF; therefore,
bit 6 is hardwired to 0b.
5
66MHZ
R
66-MHz capable. The OHCI controller operates at a maximum PCI_CLK frequency of 66 MHz;
therefore, bit 5 is hardwired to 1b.
4
CAPLIST
R
Capabilities list. Bit 4 returns 1b when read, indicating that capabilities additional to standard PCI are
implemented. The linked list of PCI power-management capabilities is implemented in this function.
3
INT_STATUS
RU
Interrupt status. This bit reflects the interrupt status of the function. Only when bit 10 (INT_DISABLE)
in the command register (PCI offset 04h, see Section 4.3) is a 0 and this bit is a 1, is the function’s INTx
signal asserted. Setting the INT_DISABLE bit to a 1 has no effect on the state of this bit. This bit has
been defined as part of the PCI Local Bus Specification (Revision 2.3).
20
RSVD
R
Reserved. Bits 30 return 0h when read.
Not Recommended for New Designs
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