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TDA7326D 数据表(PDF) 10 Page - STMicroelectronics

部件名 TDA7326D
功能描述  AM-FM RADIO FREQUENCY SYNTHESIZER
Download  16 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TDA7326D 数据表(HTML) 10 Page - STMicroelectronics

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5.0 FREQUENCY PROGRAMMATION
5.1 AM/FM Computation Resume
where:
PC = Program Counter Value (PC7 to PC0)
SC = Swallow Counter Value (SC5 to SC0)
DIV_VAL = Divider Factor
Loading registers for 11 or 12 bits of the programmable counters
1
0
PC5
PC4
PC3
PC2
PC1
PC0
1
1
SC5
(0)*
SC4
SC3
SC2
SC1
SC0
Loading registers for 5 or 6 bits of the programmable counters
11
SC5
(0)*
SC4
SC3
SC2
SC1
SC0
Setting control register for loop filter selection charge pump current bit 1, mode AM/FM selection
01
X
X
LPF2/
LPF1
CURR1 SWM/
DIR
AM
FM
Test mode inizialization (Test0 = Test1 = Test2 = 0)
0
0
TST0 TST1
TST2
SOUT CURR2
fREF
Setting control register for switch output pin 9, charge pump current bit 2, reference frequency select
000
0
0
SOUT CURR2
fREF
(*) This bit has to be ”0” for fREF =”1” (fREF = 25kHz in FM mode or 2.5KHz AM swallow mode)
Loading registers for all bytes of the programmable counters and all control registers
0
1
PC7
PC6
LPF1/
LPF2
CURR1
SWM
DIR
AM
FM
1
0
PC5
PC4
PC3
PC2
PC1
PCO
®
11
SC5
(0)*
SC4
SC3
SC2
SC1
SC0
0
0
0
0
0
SOUT CURR2
fref
4.0 BIT ORGANIZATION OF THE BUS TRANSFER OPERATION
Loading registers for all bytes of the programmable counters and all control registers
0
1
PC7
PC6
LPF2/
LPF1
CURR1
SWM
DIR
AM
FM
1
0
PC5
PC4
PC3
PC2
PC1
PCO
®
11
SC5
(0)*
SC4
SC3
SC2
SC1
SC0
fREF = 12.5KHz
FVCO = (64
⋅ PC + SC + 64) ⋅ fREF
FM SWALLOW MODE
FVCO = (DIV_VAL+ 64)
⋅ fREF
swallow 6bit
fREF = 25KHz
FVCO = (32
⋅ PC + SC + 32) ⋅ fREF
FVCO = (DIV_VAL+ 32)
⋅ fREF
swallow 5bit (bit SC5 = 0)
TDA7326
10/16


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