PDIUSBD12 Ver la hoja de datos (PDF) - Philips Electronics
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PDIUSBD12 Datasheet PDF : 35 Pages
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Philips Semiconductors
PDIUSBD12
USB interface device with parallel bus
CS_N
DMACK_N
A0
WR_N
DATA[7:0]
RD_N
DATA[7:0]
tCLRL
tCLWL
tRHCH
tWHCH
tAVRL
tAVWL
COMMAND = 1, DATA = 0
tWHAX
tWL
tWDSU
tWDH
VALID DATA
tRL
tWC
t(WC - WD)
t(WC - RD)
tRC
tRLDD
tRHDZ
VALID DATA
tRHNDV
tRLDD
Fig 18. Parallel interface timing (I/O and DMA).
Table 18: AC characteristics (DMA)
Symbol Parameter
Conditions
Single-cycle DMA timings
tAHRH
tSHAH
tRHSH
tEL
DMACK_N HIGH to DMREQ HIGH time
RD_N/WR_N HIGH to DMACK_N HIGH time
DMREQ HIGH to RD_N/WR HIGH time
EOT_N LOW pulse width
simultaneous DMACK_N,
RD_N/WR_N and EOT_N
LOW time
Burst DMA timings
tSLRL RD_N/WR_N LOW to DMREQ LOW time
tRHNDV RD_N (only) HIGH to next data valid
EOT timings
tELRL EOT_N LOW to DMREQ LOW time
VALID DATA
004aaa058
Min
Max Unit
−
330
ns
130
−
ns
120
−
ns
10
-
ns
-
40
ns
−
420
ns
−
40
ns
9397 750 09238
Product data
Rev. 08 — 20 December 2001
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
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