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PC97307 датащи(PDF) 202 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали PC97307
подробное описание детали  PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
PDF  218 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC97307 датащи(HTML) 202 Page - National Semiconductor (TI)

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Device Description
www.national.com
13.3.11 DMA Timing
TABLE 13-45. FDC DMA Timing
FIGURE 13-15. FDC DMA Timing
a. tDRP and tICP are defined in Table 13-36.
b. Only in case of pending DRQ.
c. Values shown are with the FIFO disabled, or with FIFO enabled and THRESH = 0. For nonzero values of
THRESH, add (THRESH x 8 x tDRP) to the values shown.
d. The active edge of RD or WR and TC is recognized only when DACK is active.
Symbol
Parameter
Min
Max
Unit
tKI
DACK Inactive Pulse Width
25
nsec
tKK
DACK Active Pulse Width
65
nsec
tKQ
DACK Active Edge to DRQ Inactive
65
nsec
tQK
DRQ to DACK Active Edge
10
nsec
tQP
DRQ Period (Except Non-Burst DMA)
8 x tDRP
a
tQQ
DRQ Inactive Non-Burst Pulse Width
300
400 b
nsec
tQR
DRQ to RD, WR Active
15
nsec
tQW
DRQ to End of RD, WR (DRQ Service Time)
(8 x tDRP) − (16 x tICP)
ac
tQT
DRQ to TC Active (DRQ Service Time)
(8 x tDRP) − (16 x tICP)
a c
tRQ
RD, WR Active Edge to DRQ Inactive d
65
nsec
tTQ
TC Active Edge to DRQ Inactive
75
nsec
tTT
TC Active Pulse Width
50
nsec
tQK
tKQ
tQP
tTT
tKK
tQR
tQQ
tKI
tQW
tRQ
tQT
tTQ
DRQ
DACK
RD, WR
TC



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