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參數(shù)資料
| 型號： | SAA7382GP |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Error correction and host interface IC for CD-ROM ELM |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁數(shù)： | 19/60頁 |
| 文件大?。?/td> | 226K |
| 代理商： | SAA7382GP |
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1996 Apr 25
19
Philips Semiconductors
Preliminary specification
Error correction and host interface IC for
CD-ROM (ELM)
SAA7382
7.7.16
STAT2
The bits MODE and FORM in this register indicate the mode, form and correction scheme of the current frame.
Table 11
STAT2 register bits
Table 12
MODE and FORM bits
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
RMOD3
RMOD2
RMOD1
RMOD0
MODE
FORM
RFORM1
RFORM2
MODE
FORM
SETTING
0
1
X
0
0
1
Mode 1
Mode 2, Form 1
Mode 2, Form 2 or ECC correction impossible
The Mode bit is always copied from the CTRL1 register.
The Form information is determined by the AUTORQ bit in
the CTRL0 register. When this bit is set to logic 0, the Form
information is copied from the CTRL1 register. When this
bit is set to logic 1 the Form information is copied from the
Mode header byte.
If correction of the block was impossible, FORM will be set
to logic 1 regardless of the requested correction. This will
happen under the following circumstances:
An illegally synchronized block (ILSYNC = 1 or
LBLK = 1)
A data block specified as Mode 2, Form 2, or detected
as Mode 2, Form 2
A Mode 2 submode byte error detected during
processing
A mode mismatch detected by the mode check function
(MCHQRQ = 1)
A mode byte error detected by the mode check function
(MCHQRQ = 1).
The RFORM2, RFORM1 bits contain a preview of the form
bit for the next frame
Table 13
RFORM2 and RFORM1 bits
The RMOD3, RMOD2, RMOD1 and RMOD0 bits contain
a preview of the next block MODE byte.
RMOD3 = bit7 # bit6 # bit5 # bit4 # bit3 # C2FLAG
RMOD2 = bit2 # C2FLAG
RMOD1 = bit1 # C2FLAG
RMOD0 = bit0 # C2FLAG
RFORM1
RFORM2
MEANING
0
0
1
0
1
X
Form 0
Form 1
error in form byte
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