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參數(shù)資料
| 型號： | SAA7893HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Super audio media player |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封裝： | 14 X 20 MM, 1.40 MM HEIGTH, PLASTIC, SOT-425-1, LQFP-128 |
| 文件頁數(shù)： | 21/66頁 |
| 文件大?。?/td> | 1036K |
| 代理商： | SAA7893HL |
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Philips Semiconductors
SAA7893HL
Super audio media player
Product data
Rev. 02 — 26 February 2003
21 of 66
9397 750 10925
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.3.1
Read mode
First the 16 bits of the base address are set indicated by the H_A_sel line. Then a
read access is started. In SAD16_03 mode there is no handshake line on which the
SAA7893HL can indicate that internal read operation is ready. Therefore, to be sure
that the requested data is read correctly, an extra read is needed indicated by the
H_A_sel line. In this read the data is presented as read by the previous read access.
The maximum time that the host must wait before this extra read is started is
approximately 30 sys_clk cycles. If in this time a new access is activated this access
can be lost.
Fig 15. Read from the SAA7893HL.
A(6:1)
twt
undefined
indication of an access to
the base address
write base address
Fur_base = A(22:7)
data is read indicated by H_A_sel
read ’indication’ on SAA7893HL address
locations Fur_A[22:1] = Fur_base&A(6:1)
A(22:7)
H_CSn
H_RWn
H_A_sel
H_A[6:1]
H_DQ[15:0]
MCE040
D(15:0)
undefined
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