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參數(shù)資料
| 型號： | 4040FI5 |
| 元件分類： | 復(fù)位半導(dǎo)體 |
| 英文描述： | 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit |
| 中文描述： | 4040架F15（3x7683）前端的數(shù)據(jù)資料|射頻調(diào)諧器模塊： |
| 文件頁數(shù)： | 9/17頁 |
| 文件大?。?/td> | 725K |
| 代理商： | 4040FI5 |
4040 FI5 RF F
RONT
E
ND
M
ODULE
(3
X
7683, 3
X
7748)
A
DVANCE
D
ATA
S
HEET
M
IXED
D
IGITAL AND
A
NALOG
TV
AND
ATSC A
PPLICATIONS
3X 7683 ED Revision: 07
May 00
Page 9 of 17
7683ED07.doc
P
Use the following formula to calculate oscillator frequency and divider byte.
fosc = fref
×
8
×
SF
Where:
fosc = Local oscillator frequency
fref = Crystal reference frequency / 512 = 4 MHz / 512 = 7.8125 kHz
SF = Programmable scaling factor
Scaling factor is SF = 16384
×
n14 + 8192
×
n13
×
4096
×
n12 + 2048
×
n11 + 1024
×
n10 + 512
×
n9 + 256
×
n8 + 128
×
n7 + 64
×
n6 + 32
×
n5 + 16
×
n4 + 8
×
n3 + 4
×
n2 + 2
×
n1 + n0
10.4
CONTROL BYTE
Table 10
Control Byte 1 Settings (Default)
MSB
LSB
ACK
Control byte 1
1
0
0
0
1
1
1
0
A
Table 11
Control Byte 2 (Band Selection)
B
AND
A
CTIVE
P
ORT
P7
P6
P5
P4
P3
P2
P1
P0
VHF Low
P7, P5
1
0
1
0
0
X
1
X
X
VHF High
P7, P4
1
0
0
1
0
X
X
X
UHF
P5, P4
0
0
1
1
0
X
X
X
1
X is not used
10.5
READ DATA FORMAT
Table 12
Read Data Format (I
2
C)
MSB
LSB
ACK
Address byte
1
1
0
0
0
MA1
MA0
R/W
A
Status byte
POR
FL
I2
I1
I0
A2
A1
A0
A
Note: MSB is transmitted first.
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