參數(shù)資料
型號(hào)： ISP1181BDGG,112
廠商： NXP SEMICONDUCTORS
元件分類： 總線控制器
英文描述： UNIVERSAL SERIAL BUS CONTROLLER, PDSO48
封裝： 6.10 MM, PLASTIC, MO-153, SOT-362-1, TSSOP-48
文件頁數(shù)： 8/70頁
文件大?。?/td> 341K
代理商： ISP1181BDGG,112
Philips Semiconductors
ISP1181B
Full-speed USB peripheral controller
Product data
Rev. 02 — 07 December 2004
16 of 70
9397 750 13958
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
10.2 8237 compatible mode
The 8237 compatible DMA mode is selected by clearing bit DAKOLY in the Hardware
Conguration Register (see Table 20). The pin functions for this mode are shown in
The DMA subsystem of an IBM compatible PC is based on the Intel 8237 DMA
controller. It operates as a ‘y-by’ DMA controller: the data is not stored in the DMA
controller, but it is transferred between an I/O port and a memory address. A typical
example of ISP1181B in 8237 compatible DMA mode is given in Figure 4.
The 8237 has two control signals for each DMA channel: DREQ (DMA Request) and
DACK (DMA Acknowledge). General control signals are HRQ (Hold Request) and
HLDA (Hold Acknowledge). The bus operation is controlled via MEMR (Memory
Read), MEMW (Memory Write), IOR (I/O read) and IOW (I/O write).
12
1101
OUT: read
IN: write
13
1110
OUT: read
IN: write
14
1111
OUT: read
IN: write
Table 7:
Endpoint selection for DMA transfer…continued
Endpoint
identier
EPIDX[3:0]
Transfer direction
EPDIR = 0
EPDIR = 1
Table 8:
8237 compatible mode: pin functions
Symbol
Description
I/O
Function
DREQ
DMA request
O
ISP1181B requests a DMA transfer
DACK
DMA acknowledge
I
DMA controller conrms the transfer
EOT
end of transfer
I
DMA controller terminates the transfer
RD
read strobe
I
instructs ISP1181B to put data on the bus
WR
write strobe
I
instructs ISP1181B to get data from the
bus
Fig 4.
ISP1181B in 8237 compatible DMA mode.
AD0,
DATA1 to DATA15
CPU
004aaa137
RAM
ISP1181B
DMA
CONTROLLER
8237
DREQ
DACK
DREQ
HRQ
HLDA
HRQ
HLDA
DACK
IOR
IOW
MEMR
MEMW
RD
WR
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISP1181BDGG-T 制造商:ST-Ericsson 功能描述:USB Peripheral Controller 48-Pin TSSOP T/R
ISP1181BDGGTM 功能描述:IC USB HOST CTRL FLL-SPD 48TSSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A
ISP1181BPC 制造商:ST-Ericsson 功能描述:Full-Speed Universal Serial Bus Peripheral Controller
ISP1181BS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BUS CONTROLLER
ISP1181DGG 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus interface device
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