參數(shù)資料
型號(hào)： XRS10L120IV
廠商： EXAR CORP
元件分類： 數(shù)字信號(hào)處理外設(shè)
英文描述： SERIAL ATA II: 1:2 PORT MULTIPLIER
中文描述： DSP-MULTIPLIER, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, LQFP-100
文件頁(yè)數(shù)： 12/52頁(yè)
文件大小： 399K
代理商： XRS10L120IV
XRS10L120
PRELIMINARY
10
SERIAL ATA II: 1:2 PORT MULTIPLIER
REV. P1.0.1
device has issued an R_OK primitive to indicate successful frame reception. In this way, the R_OK status
handshake is interlocked from the device to the host.
If an error is detected during any part of the frame transfer, the XRS10L120 will ensure that the error condition
is propagated to the host and the device. If no error occurs during frame transfer, the XRS10L120 will not alter
the contents of the frame, or modify the CRC in any way.
2.5.1
Transmission from a Device to a Host
A device indicates a transmit to a host in the same way as would be done if the host and device were attached
directly. This transaction obeys the following procedure:
1.
After receiving an X_RDY primitive from the device, the XRS10L120 will determine if the X bit is set in the
device port's PSCR (SError) register. The XRS10L120 will not issue an R_RDY primitive to the device until
this bit is cleared to zero.
2.
The XRS10L120 will then receive the frame from the device. The XRS10L120 will fill in the PM Port field
with the port address of the transmitting device. The XRS10L120 will then check the CRC received from
the device, and if valid, it will recalculate the CRC based upon the new PM Port field. If the CRC calculated
from the device is incorrect, the XRS10L120 will corrupt the CRC sent to the host to ensure propagation of
the error condition
3.
The XRS10L120 will issue an X_RDY primitive to the host to start the transmission of the frame to the host.
After the host issues an R_RDY primitive to the XRS10L120, the frame from the device, with the updated
CRC, will then be transmitted to the host. The XRS10L120 will not send an R_OK status primitive to the
device until the host has issued an R_OK primitive to indicate successful frame reception. In this way, the
R_OK status handshake will be interlocked from the device to the host.
If an error is detected during any part of the frame transfer, the XRS10L120 will ensure that the error condition
is propagated to the host and the device.
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XRS10L140IV 制造商:EXAR 制造商全稱:EXAR 功能描述:SERIAL ATA II: PORT MULTIPLIER
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