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參數(shù)資料
| 型號(hào)： | SAA7893HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)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)： | 34/66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
34 of 66
9397 750 10925
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.6.1
Writing base address
In
Figure 30
the writing of the base address and a Hword to the host is given in
SAD08 mode. First, the 12 bits base address is written indicated by H_A_sel line.
The SAA7893HL samples the base address on H_DQ(7:0) and H_DQ(11:8). After
that the normal write operation is performed as explained in
Section 8.6.2
.
8.6.2
Writing to the SAA7893HL
A write to address N of 16 bits to the SAA7893HL will be translated to two byte
accesses. First the LSB byte is written to address N [so A(0) = logic 0] and stored in
cache. Then the MSB byte is written to address N+1 [so A(0) = logic 1]. When the
SAA7893HL receives a write command at an odd address [A(0) = logic 1] always
16 bits are internally written whereby the Hword is composed of LSB byte in cache
and the MSB byte received at present write command. The SAA7893HL can be set to
big and little endian, whereby the described situation is the power-on state. Byte read
or write operations are not supported in SAD08 mode.
Fig 30. Base address writing.
A(6:1)
D(7:0)
A(22:15)
D(15:8)
A(10:7)
indication of an access to
the base address
write base address
Fur_base = A(22:11)
write/read on SAA7893HL address
locations Fur_A[22:1] = Fur_base&A(10:1)
A(14:11)
H_CSn
H_RWn
H_A_sel
H_A[6:1]
H_DQ[15]
H_DQ[7:0]
H_DQ[11:8]
MCE051
A(10:7)
A(6:1)
MSB write/read
LSB write/read
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