ISP1362
Single-chip USB OTG controller
Philips Semiconductors
20.2.3 DC single-cycle DMA timing (8237 mode)
Table 155: Dynamic characteristics: DC single-cycle DMA timing (8237 mode)
Symbol
Parameter
Conditions
Min
-
Typ
Max
40
-
Unit
ns
tASRP
DREQ2 off after DACK2 on
-
-
Tcy(DREQ2) cycle time signal DREQ2
180
ns
T
RC
t
ASRP
DREQ2
DACK2(1)
004aaa111
(1) Programmable polarity: shown as active LOW.
Fig 35. DC single-cycle DMA timing (8237 mode).
20.2.4 DC single-cycle DMA read timing in DACK-only mode
Table 156: Dynamic characteristics: DC single-cycle DMA read timing in DACK-only mode
Symbol
tASRP
Parameter
Conditions
Min
Typ
Max
40
-
Unit
ns
DREQ off after DACK on
DACK pulse width
-
-
-
-
-
-
tASAP
25
ns
tASAP + tAPRS DREQ on after DACK off
180
-
ns
tASDV
tAPDZ
data valid after DACK on
data hold after DACK off
-
-
22
3
ns
ns
t
t
APRS
ASRP
DREQ2
t
ASAP
DACK2(1)
t
t
APDZ
ASDV
DATA
004aaa112
(1) Programmable polarity: shown as active LOW.
Fig 36. DC single-cycle DMA read timing in DACK-only mode.
9397 750 12337
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 03 — 06 January 2004
140 of 150
NXP [ NXP ]
