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參數資料
型號： ISP1161
廠商： NXP Semiconductors N.V.
英文描述： Full-speed Universal Serial Bus single-chip host and device controller
中文描述： 全速通用串行總線的單芯片主機和設備控制器
文件頁數： 49/127頁
文件大?。?/td> 2762K
代理商： ISP1161
Philips Semiconductors
ISP1161
Full-speed USB single-chip host and device controller
Product data
Rev. 01 — 3 July 2001
49 of 130
9397 750 08313
Philips Electronics N.V. 2001. All rights reserved.
12.2 8237 compatible mode
The 8237 compatible DMA mode is selected by clearing bit DAKOLY in the Hardware
Configuration Register (see
Table 81
). The pin functions for this mode are shown in
Table 11
.
The DMA subsystem of an IBM compatible PC is based on the Intel 8237 DMA
controller. It operates as a ‘fly-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 ISP1161 DC in 8237 compatible DMA mode is given in
Figure 38
.
The 8237 has two control signals for each DMA channel: DREQ (DMA Request) and
DACK (DMA Acknowledge). General control signals are HRQ (Hold Request), HLDA
(Hold Acknowledge) and EOP (End-Of-Process). The bus operation is controlled via
MEMR (Memory Read), MEMW (Memory Write), IOR (I/O read) and IOW (I/O write).
11
12
13
14
1100
1101
1110
1111
OUT: read
OUT: read
OUT: read
OUT: read
IN: write
IN: write
IN: write
IN: write
Table 10: Endpoint selection for DMA transfer
…continued
Endpoint
identifier
EPIDX[3:0]
Transfer direction
EPDIR = 0
EPDIR = 1
Table 11: 8237 compatible mode: pin functions
Symbol
Description
DREQ2
DC’s DMA request
DACK2
DC’s DMA
acknowledge
EOT
end of transfer
RD
read strobe
I/O
O
I
Function
ISP1161 DC requests a DMA transfer
DMA controller confirms the transfer
I
I
DMA controller terminates the transfer
instructs ISP1161 DC to put data on the
bus
instructs ISP1161 DC to get data from the
bus
WR
write strobe
I
Fig 38. ISP1161’s device controller in 8237 compatible DMA mode.
D0 to D15
CPU
004aaa009
RAM
ISP1161
DEVICE
CONTROLLER
DMA
CONTROLLER
8237
DREQ
DREQ2
DACK2
HRQ
HLDA
HRQ
HLDA
DACK
IOR
IOW
MEMR
MEMW
RD
WR
相關PDF資料
PDF描述
ISP1161A1 Universal Serial Bus single-chip host and device controller
ISP1161A1BD Universal Serial Bus single-chip host and device controller
ISP1161A1BM Universal Serial Bus single-chip host and device controller
ISP1161BD Full-speed Universal Serial Bus single-chip host and device controller
ISP1161BM Full-speed Universal Serial Bus single-chip host and device controller
相關代理商/技術參數
參數描述
ISP1161A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus single-chip host and device controller
ISP1161A1 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus single-chip host and device controller
ISP1161A1BD 功能描述:IC USB HOST/DEVICE CTRLR 64-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝: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 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A
ISP1161A1BD,118 功能描述:USB 接口集成電路 USB1.1 HOST &DEVICE RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1161A1BD,151 功能描述:USB 接口集成電路 USB1.1 HOST &DEVICE RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
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