參數(shù)資料
型號: L64007
廠商: LSI CORP
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP160
封裝: PLASTIC, QFP-160
文件頁數(shù): 36/166頁
文件大?。?/td> 1015K
代理商: L64007
register
48 Wed May 28 17:37:25 1997
Draft 1/21/97
4-48
Registers
PRE.4 for Rev. D
Copyright 1997 by LSI Logic Corporation. All rights reserved.
same data when the SAR is written. During operation, the value in the
LAR is changed by the chip-internal MMU. During operation, the LAR
value is updated to the current value of WAR when section has been
stored in the memory with no errors.
LAR_MSB
Last Address Register 16 MSBs
[15:0]
The read value indicates the start address location of the
last section that has been stored in the cyclic buffer for
this PID.
4.10.5
Read Address
Register (RAR)
(Groups 1and 2
Only)
This read-only register species the 16 MSBs of the 21-bit current
address location where the next data in the cyclic buffer for PIDs in
Group 1 and 2 is read out to the transport buffers. The 5 LSBs of this
register are specied in the ER register. The MMU monitors this register,
so the user can read from, but not write to, this register.
The RAR value is always between the cyclic buffer boundaries (SAR and
EAR values). At the beginning of operation, the RAR value is equal to
SAR value. The RAR value is incremented by one with every read cycle
to the associated cyclic buffer. When RAR reaches the value of EAR, it
wraps around to the SAR value. If, during the increment of RAR, the
value reaches the WAR value, it indicates that the buffer is empty.
RAR_MSB
Read Address Register 16 MSBs
The specied value is the next address in the cyclic buffer
that is read for a specic PID.
15
0
LAR_MSB
15
0
RAR_MSB
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