データシートサーチシステム
Selected language   Japanese  ▼
品番検索
         詳細検索


MC68340 データシート(Datasheet) 40 Page - Freescale Semiconductor, Inc

部品番号. MC68340
部品情報  Integrated Processor with DMA User’s Manual
ダウンロード  441 Pages
Scroll/Zoom Zoom In 100% Zoom Out
メーカー  FREESCALE [Freescale Semiconductor, Inc]
ホームページ  http://www.freescale.com
Logo 

 40 page
background image
2- 6
MC68340 USER’S MANUAL
MOTOROLA
Port B4, B2, B1,
AVEC
This signal group functions as three bits of parallel I/O and the autovector input.
AVEC
requests an automatic vector during an interrupt acknowledge cycle.
2.6 INTERRUPT REQUEST LEVEL
(IRQ7, IRQ6, IRQ5, IRQ3)
These pins can be programmed to be either prioritized interrupt request lines or port B
parallel I/O.
IRQ7, IRQ6,
IRQ5, IRQ3
IRQ7, the highest priority, is nonmaskable. IRQ6–IRQ1 are internally maskable
interrupts. Refer to Section 5 CPU32 for more information on interrupt request lines.
Port B7, B6, B5, B3
These pins can be used as port B parallel I/O. Refer to Section 4 System Integration
Module for more information on parallel I/O signals.
2.7 BUS CONTROL SIGNALS
These signals control the bus transfer operations of the MC68340. Refer to Section 3
Bus Operation for more information on these signals.
2.7.1 Data and Size Acknowledge (
DSACK1, DSACK0)
These two active-low input signals allow asynchronous data transfers and dynamic data
bus sizing between the MC68340 and external devices as listed in Table 2-3. During bus
cycles, external devices assert
DSACK1 and/or DSACK0 as part of the bus protocol.
During a read cycle, this signals the MC68340 to terminate the bus cycle and to latch the
data. During a write cycle, this indicates that the external device has successfully stored
the data and that the cycle may terminate.
Table 2-3.
DSACK
≈ Encoding
DSACK
1
DSACK
0
Result
1
1
Insert Wait States in Current Bus Cycle
1
0
Complete Cycle—Data Bus Port Size Is 8 Bits
0
1
Complete Cycle—Data Bus Port Size Is 16 Bits
0
0
Reserved—Defaults to 16-Bit Port Size Can Be
Used for 32-Bit DMA Cycles
2.7.2 Address Strobe (
AS)
AS is an output timing signal that indicates the validity of both an address on the address
bus and many control signals.
AS is asserted approximately one-half clock cycle after the
beginning of a bus cycle.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com




Html ページ

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90  91  92  93  94  95  96  97  98  99  100   ...More


Datasheet Download



関連電子部品番号

部品番号コンポーネントの説明Html Viewメーカー
HMC585MS8GHIGH IP3 GaAs MMIC MIXER with INTEGRATED LO AMPLIFIER 400 - 650 MHz 1 2 3 4 5 MoreHittite Microwave Corporation
ADA4412-3Integrated Triple Video Filter with Selectable Cutoff Frequencies for RGB HD/SD 1 2 3 4 5 MoreAnalog Devices
LMX2531LQ1500EHigh Performance Frequency Synthesizer System with Integrated VCO 1 2 3 4 5 MoreNational Semiconductor (TI)
MSP34X1GMultistandard Sound Processor Family with Virtual Dolby Surround 1 2 3 4 5 MoreMicronas
ADN2804622 Mbps Clock and Data Recovery IC with Integrated Limiting Amplifier 1 2 3 4 5 MoreAnalog Devices
AD999212-Bit CCD Signal Processor with Precision Timing Generator 1 2 3 4 5 MoreAnalog Devices
ADE7768Energy Metering IC with Integrated Oscillator and Positive Power Accumulation 1 2 3 4 5 MoreAnalog Devices
CS5302Two−Phase Buck Controller with Integrated Gate Drivers and 4−Bit DAC 1 2 3 4 5 MoreON Semiconductor
CS5303Three−Phase Buck Controller with Integrated Gate Drivers 1 2 3 4 5 MoreON Semiconductor
CS5308Two−Phase PWM Controller with Integrated Gate Drivers for VRM 8.5 1 2 3 4 5 MoreON Semiconductor

リンク URL

ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ]  

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   ブックマーク   |   リンク交換   |   メーカーリスト
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl