- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359147 > MC72000 (飛思卡爾半導(dǎo)體(中國)有限公司) Integrated Bluetooth Radio PDF資料下載
參數(shù)資料
| 型號： | MC72000 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Integrated Bluetooth Radio |
| 中文描述： | 集成藍(lán)牙無線 |
| 文件頁數(shù)： | 38/156頁 |
| 文件大?。?/td> | 1782K |
| 代理商： | MC72000 |
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頁當(dāng)前第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頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁
38
MC72000 Advance Information Data Sheet
Go to: www.freescale.com
MOTOROLA
Radio Functional Description
6.4.2 Main Synthesizer Operation
The internal local oscillator (LO) of the MC72000 is derived from the external reference frequency by
means of a 3-accumulator, fractional-N synthesizer. The external low pass filter (C14/R1 of Figure 3) has a
corner frequency of approximately 140 kHz. The external low pass filter requires two or three passive
components, dependent on the reference frequency.
f
dev
is the nominal transmit ROM frequency deviation (typically 157500 Hz).
I
is the integer portion of the fractional synthesizer.
R
is the numerator portion of the fractional synthesizer.
f
ref
External
is the external reference frequency.
LO
is the desired local oscillator frequency then,
I
= (LO/f
ref
External - f
dev
/f
ref
External) - 3
R
= REM(LO/f
ref
External - f
dev
/f
ref
External) x 2
16
where the INT function is the integer portion of the result and REM is the remainder portion of the result.
An example is shown below:
f
dev
= 157500 Hz
LO
= 2.441 GHz
f
ref
External
= 13 MHz
then,
I
= INT(2.441 GHz/13 MHz - 157.5 kHz/13 MHz) - 3 = 184
10
R
= REM(2.441 GHz/13 MHz - 157.5 kHz/13 MHz) x 2
16
= 49618
10
Accuracy to at least 10 decimal places is suggested.
6.4.3 Transmit ROM Operation
The MC72000 uses a look-up table (LUT or Transmit ROM) to shape incoming transmit data bits and
produce a Gaussian filtered mask with BT=0.5. The value of the current data bit, along with knowledge of
the previous two bits, determines a unique trajectory for shaping. Only four unique trajectories are required
to implement this filter, and due to the symmetrical nature of the Gaussian response, these trajectories can
be reduced to a single quadrant. Furthermore, without compromising accuracy, this table can be reduced to
only 11 values.
The output of the LUT is fed to the accumulators of the fractional synthesizer. The seven MSBs are
eventually fed to the second port of the main VCO during transmit operation (see Figure 17). For receive
operation, the output of the LUT is constantly held to the value contained in R1C1.
These 11 trajectory constants are listed in Table 18 (see also Figure 94, Radio Register Map). The actual
value to place in the LUT is calculated as:
LUT RxCx
b10
= (f
dev
/f
ref
External) x 2
16
x (RxCx constant)
This number is then rounded and converted to binary:
LUT RxC
xb2
= INT((LUT RxCx
b10
+2)/4)
where the INT function is the integer portion of the result.
As an example for calculating the LUT value for R4C2 and f
ref
External = 13 MHz:
LUT R
4
C
2b10
= (157.5 kHz/13.0 MHz) x 2
16
x 0.5229292198 = 415.2
F
For More Information On This Product,
n
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC7445ARX1000LF | RISC Microprocessor Hardware Specifications |
| MC7445ARX1000LG | RISC Microprocessor Hardware Specifications |
| MC7447A | PowerPC microprocessor |
| MC7447AHX1000NB | PowerPC microprocessor |
| MC7447AHX1167NB | PowerPC microprocessor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC7220C-100M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20CORE 100M 制造商:pro-power 功能描述:CABLE, DEF 7-2-20C, 20CORE, 100M 制造商:pro-power 功能描述:CABLE, DEF 7-2-20C, 20CORE, 100M; Reel Length (Imperial):328ft; Reel Length (Metric):100m; No. of Conductors:20; Voltage Rating:440V; No. of Strands x Strand Size:7 x 0.2mm; Conductor Area CSA:0.22mm2; Jacket Colour:Black; Jacket ;RoHS Compliant: Yes |
| MC7220C-100M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20 CORE 100M |
| MC7220C-25M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20CORE 25M 制造商:pro-power 功能描述:CABLE, DEF 7-2-20C, 20CORE, 25M |
| MC7220C-25M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20 CORE 25M |
| MC7225C-25M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-25C 25CORE 25M 制造商:pro-power 功能描述:MULTICORE, 25, 7/0.2MM, 25M, BLACK 制造商:pro-power 功能描述:CABLE, DEF 7-2-25C, 25CORE, 25M 制造商:PRIVATE LABEL 功能描述:CABLE, DEF 7-2-25C, 25CORE, 25M, Reel Length (Imperial):82ft, Reel Length (Metri |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。