Cypress SL811HS - Manual (Page 29)

SL811HS
Document 38-08008 Rev. *D Page 29 of 32
DMA Read Cycle
Note Data is held until nDACK goes high regardless of state of nREAD.
Reset Timing
Note Clock is 48 MHz nominal.
Parameter Description Min. Typ. Max.
tdack nDACK low 100 ns
tddrdlo nDACK to nRD low delay 0 ns
tdckdr nDACK low to nDRQ high delay 5 ns
tdrdp nRD pulse width 90 ns
tdhld Date hold after nDACK high 5 ns
tddaccs Data access from nDACK low 85 ns
tdrdack nRD high to nDACK high 0 ns
tdakrq nDRQ low after nDACK high 5 ns
trdcycle DMA Read Cycle Time 150 ns
n D R Q
n D A C K
D 0-D 7 D A T A
n R D
S L 811 D M A R E A D C Y C L E T IM IN G
tdrdp
tdaccs
tdack
tdhld
tddrdlo
tdckdr
tdakrq
SL811 DMA Read Cycle Timing
nRST
treset
nRD or nWR
tioact
Reset Timing
Parameter Description Min. Typ. Max.
t
RESET
nRst Pulse width 16 clocks
t
IOACT
nRst HIGH to nRD or nWR active 16 clocks