參數(shù)資料
型號(hào): ISP1183BS
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Low-power Universal Serial Bus interface device with DMA
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC32
封裝: 5 X 5 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT-617-1, HVQFN-32
文件頁(yè)數(shù): 51/62頁(yè)
文件大?。?/td> 295K
代理商: ISP1183BS
Philips Semiconductors
ISP1183
Low-power USB interface device with DMA
Product data
Rev. 01 — 24 February 2004
51 of 62
9397 750 11804
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
18.3 DMA timing: single-cycle mode
(1) Example: read data.
Fig 18. Read data + write command cycle timing.
004aaa428
Tcy(RD-WC)
data
DATA
WR_N
data
(1)
command
RD_N
CS_N
Table 57:
V
BUS
= V
REG(3V3)
= 2.7 V to 3.9 V; V
DD(I/O)
= 1.8 V
Symbol
Parameter
8237 compatible mode (see
Figure 19
)
t
ASRP
DREQ off after DACK on
T
cy(DREQ)
cycle time signal DREQ
Read in DACK-only mode (see
Figure 20
)
t
ASRP
DREQ off after DACK on
t
ASAP
DACK pulse width
t
ASAP
+ t
APRS
DREQ on after DACK off
t
ASDV
data valid after DACK on
t
APDZ
data hold after DACK off
Write in DACK-only mode (see
Figure 21
)
t
ASRP
DREQ off after DACK on
t
ASAP
+ t
APRS
DREQ on after DACK off
t
DVAP
data setup before DACK off
t
APDZ
data hold after DACK off
Dynamic characteristics: single-cycle DMA timing
Conditions
Min
Max
Unit
-
90
40
-
ns
ns
-
25
90
-
-
40
-
-
22
3
ns
ns
ns
ns
ns
-
90
5
3
40
-
-
-
ns
ns
ns
ns
Fig 19. DMA timing in 8237 compatible mode.
004aaa429
DREQ
DACK_N
tASRP
Tcy(DREQ)
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