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參數(shù)資料
| 型號(hào)： | SAA7381 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | ATAPI CD-R block decoder |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP144 |
| 文件頁數(shù)： | 76/108頁 |
| 文件大?。?/td> | 380K |
| 代理商： | SAA7381 |
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1997 Aug 12
76
Philips Semiconductors
Objective specification
ATAPI CD-R block decoder
SAA7381
Notes
1.
T
cy
is the minimum total cycle time, t
W(DIOR/DIOW)
is the minimum command active time, and t
rec(DIOR/DIOW)
is the
minimum command recovery time or command inactive time. The actual cycle time equals the sum of the actual
command active time and the actual command inactive time. The three timing requirements of T
cy
, t
W(DIOR/DIOW)
, and
t
rec(DIOR/DIOW)
shall be met. The minimum total cycle time requirements is greater than the sum of t
W(DIOR/DIOW)
and
t
rec(DIOR/DIOW)
. This means a host implementation can lengthen either or both t
W(DIOR/DIOW)
or t
rec(DIOR/DIOW)
to ensure
that T
cy
is equal to or greater than the value reported in the devices identify drive data. A device implementation shall
support any legal host implementation.
This parameter specifies the time from the negation edge of DIOR to the time that the data bus is no longer driven
by the device (3-state).
The delay from the activation of DIOR or DIOW until the state of IORDY is first sampled. If IORDY is inactive then
the host shall wait until IORDY is active before the PIO cycle can be completed. If the device is not driving IORDY
negated at the t
su(IORDY)
after the activation of DIOR or DIOW, then t
su(DIOR)
shall be met and t
R(DAT-IORDY)
is not
applicable. If the device is driving IORDY negated at the time t
su(IORDY)
after the activation of DIOR or DIOW, then
t
R(DAT-IORDY)
shall be met and t
su(DIOR)
is not applicable.
t
ass(A-IOCS16)
and t
rel(A-IOCS16)
apply only to Modes 0, 1 and 2. This signal is not valid for other modes.
2.
3.
4.
t
R(DAT-IORDY)
read data valid to IORDY active
(if IORDY initially LOW after
t
su(IORDY)
)
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
note 4
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
0
0
0
0
0
ns
ns
ns
ns
ns
t
su(IORDY)
IORDY set-up time
35
35
35
35
35
1250
1250
1250
1250
1250
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
W(IORDY)
IORDY pulse width
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
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