參數(shù)資料
型號(hào)： GL813
廠商： Electronic Theatre Controls, Inc.
英文描述： USB 2.0 CompactFlash Card Reader Controller
中文描述： 個(gè)USB 2.0 CF卡讀卡機(jī)控制
文件頁(yè)數(shù)： 17/24頁(yè)
文件大?。?/td> 132K
代理商： GL813
GL813 - USB2.0 CompactFlash Card Reader Controller
2001-2002 Genesys Logic Inc.—All rights reserved.
Page 17 of 24
5.2 Receive Operation
5.2.1 Receive State Diagram
z
RXACTV and RXVLD are sampled on the rising edge of CLKOUT.
z
In the RX Wait state the receiver is always looking for SYNC.
z
The Macrocell asserts RXACTV when SYNC is detected (Strip SYNC state).
z
The Macrocell negates RXACTV when an EOP is detected (Strip EOP state).
z
When RXACTV is asserted, RXVLD will be asserted if the RX Holding Register is
full.
z
RXVLD will be negated if the RX Holding Register was not loaded during the
previous byte time. This will occur if 8 stuffed bits have been accumulated.
z
The SIE must be ready to consume a data byte if RXACTV and RXVLD are asserted
(RX Data state).
z
In FS mode, if a bit stuff error is detected then the Receive State Machine will negate
RXACTV and RXVLD, and return to the RXWait state.
Reset
!RXACTV
!RXVLD
RX Wait
Trip SYNC
RXACTV
Rx Data
RXVLD
RX Data Wait
!RXVLD
Strip EOP
!RXACTV
!RXVLD
HRST#
!HRST#
SYNC Detected
Data
!Data
!SYNC
SYNC
Data
Data
Abort 1
!RXACTV
!RXVLD
!RXERR
Terminate
!RXACTV
Abort 2
!RXVLD
!RXERR
Error
RXERR
EOP
Detected
!Data
Receive
Error
!Idle
state
Idle
state
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