SCN26562C4N48 查看數據表（PDF） - Philips Electronics
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SCN26562C4N48 Datasheet PDF : 17 Pages
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Philips Semiconductors
Dual universal serial communications controller (DUSCC)
Product specification
SCN26562
AC ELECTRICAL CHARACTERISTICS (Continued)
RxDRQN
RxDAKN
RDN
tRALRAH
A
tRAHRAL
tRALRRH
MEMWN
EOPN
(OUTPUT)
B
tRALDDV
tRAHDDI
tRALEOL
D7–D0
NOTES:
A Ignored by the DUSCC bit; it can be used to qualify RxDAKN.
B Memory read signal; not seen by DUSCC.
tRAHDDF
Figure 15. DMA-Receive Single Address Mode
tRAHEOF
SD00217
SYMBOL
PARAMETER
tRAHRAL
tRALRAH
tRALRRH
tRALEOL
tRAHEOF
tRALDDV
tRAHDDI
tRAHDDF
Receive DMA ACKN high to low time
Receive DMA ACKN low to high time
Rx DMA ACKN low to Rx DMA REQN high
Rx DMA ACKN low to EOPN output low
Rx DMA ACKN high to EOPN output float
Rx DMA ACKN low to read data valid
Rx DMA ACKN high to read data invalid
Rx DMA ACKN high to data bus float
LIMITS
SCN26562C4
SCN26562C2
Min
Max
Min
Max
160
160
250
320
250
320
200
200
225
225
225
225
10
125
10
125
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
1995 May 1
15
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