- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361324 > QSMRM QSMRM QSM Queued Serial Module Reference Manual PDF資料下載
參數(shù)資料
| 型號： | QSMRM |
| 英文描述： | QSMRM QSM Queued Serial Module Reference Manual |
| 中文描述： | QSMRM QSM排隊串行模塊參考手冊 |
| 文件頁數(shù)： | 80/112頁 |
| 文件大?。?/td> | 1496K |
| 代理商： | QSMRM |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁當(dāng)前第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁
MOTOROLA
A-2
USING THE QSPI FOR ANALOG DATA AQUISITION
For More Information On This Product,
Go to: www.freescale.com
QSM
REFERENCE MANUAL
analog inputs, labeled AN0–AN11, and two voltage reference inputs, labeled V
AG
(an-
alog ground) and V
REF
(positive reference voltage). Power is supplied through the V
SS
and V
DD
pins and is a nominal 5-V. The MC145050 requires an external clock to be
supplied on the A/D CLK pin to regulate the data conversion.
Channel selection and conversion results are transferred through the digital serial
communication pins. A serial transfer synchronizing clock must be fed into the SCLK
input pin when the chip-select (CS) pin is driven low. The address to be converted is
serially transmitted into the DIN pin, and the conversion results are serially shifted out
the DOUT pin.
The MC145050 is designed to be used in conjunction with multiple serial devices on a
common bus; consequently, the DOUT pin is driven only when CS is asserted. The
serial protocol employed is Motorola SPI, which is compatible with the National Semi-
conductor Microwirea system and the Texas Instrument TMS370 series SPI units. The
Motorola queued serial module (QSM) also contains a QSPI that efficiently imple-
ments this protocol.
Figure A-1 MC145050 Pinout
A.3 Fundamentals of QSPI Operation
The following paragraphs give a brief overview of the QSPI as it applies to the exam-
ples that are presented. A more detailed description of the QSPI is contained in Sec-
tion 5 of
MC68332 User's Manual (see
Reference 2.
).
The QSPI is an intelligent, synchronous serial interface with a 16-entry, full-duplex
queue. It can continuously scan up to 16 independent peripherals and maintain a
queue of the most recently acquired information with no central processor unit (CPU)
intervention. It features variable word lengths, programmable chip selects, and select-
MC145050
ANALOG INPUTS
AN0-AN10
VOLTAGE
REFERENCES
DIGITAL SERIAL
COMMUNICATION PINS
A/D CONVERSION
CLOCK INPUT
(UP TO 2 MHz)
POWER SUPPLY
(5-V NOMINAL)
AN1
0
AN9
AN8
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
VRE
12
11
9
8
7
6
5
4
3
2
1
14
13
CS
SCK
DIN
DOUT
A/D
CLK
VDD
VSS
15
18
17
16
19
20
10
F
Freescale Semiconductor, Inc.
n
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| QSOP-24 | Package MQA24 |
| QST4 | Low frequency amplifier |
| QST9 | General purpose amplification (−30V, −1A) |
| QSX7 | General purpose amplification (12V, 1.5A) |
| QSZ1 | General purpose transistor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| QSMS-0136 | 制造商:Avago Technologies 功能描述:SCHOTTKY DIODE, PART NUMBER ASSIGNED TO REPLACE HSMS-0005 - Gel-pak, waffle pack, wafer, diced wafer on film |
| QSMS-2926-TR1G | 制造商:Avago Technologies 功能描述:SCHOTTKY DIODE - Tape and Reel |
| QSMT-AW13-NSUZ1 | 制造商:Avago Technologies 功能描述:MS AV,1W CWHITE - Tape and Reel |
| QSMT-FW85-NX000 | 制造商:Avago Technologies 功能描述:THIS HIGH BRIGHTNESS LED LIGHT SOURCE |
| QSMT-L060-227NG | 制造商:Avago Technologies 功能描述:L2 LED CONTOUR LIGHTING,COLORLESS - Rail/Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。