參數(shù)資料
型號: VS1003
廠商: Electronic Theatre Controls, Inc.
元件分類: Codec
英文描述: MP3 / WMA AUDIO CODEC
中文描述: MP3播放/ WMA音頻編解碼器
文件頁數(shù): 40/57頁
文件大?。?/td> 456K
代理商: VS1003
VLSI
Solution
y
VS1003 PRELIMINARY
VS1003
9. OPERATION
9.7.3
Memory Test
Memory test mode is initialized with the 8-byte sequence 0x4D 0xEA 0x6D 0x54 0 0 0 0. After this
sequence, wait for 500000 clock cycles. The result can be read from the SCI register SCI HDAT0, and
’one’ bits are interpreted as follows:
Bit(s)
15
14:7
6
5
4
3
2
1
0
Mask
0x8000
Meaning
Test finished
Unused
Mux test succeeded
Good I RAM
Good Y RAM
Good X RAM
Good I ROM
Good Y ROM
Good X ROM
All ok
0x0040
0x0020
0x0010
0x0008
0x0004
0x0002
0x0001
0x807f
Memory tests overwrite the current contents of the RAM memories.
9.7.4
SCI Test
Sci test is initialized with the 8-byte sequence 0x53 0x70 0xEE
n
0 0 0 0, where
n
48
is the register
number to test. The content of the given register is read and copied to SCI HDAT0. If the register to be
tested is HDAT0, the result is copied to SCI HDAT1.
Example: if
n
is 48, contents of SCI register 0 (SCI MODE) is copied to SCI HDAT0.
Version 0.92,
2005-06-07
40
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