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F0448 Datasheet(PDF) 37 Page - Renesas Technology Corp

Part # F0448
Description  Dual Matched Broadband RF DVGA 3.3GHz to 4.2GHz
PDF  43 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

F0448 Datasheet(HTML) 37 Page - Renesas Technology Corp

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F0448 Datasheet
X0008129 Rev.1.4
Feb 17, 2021
Page 37
7.4.4.
Serial Control
Both channels have a digital controlled attenuator, DSA1_A and DSA1_B, which share the serial control word.
The serial control pins are on header J13 and are shown in Figure 79. Table 13 lists the pin functions on header
J13.
Figure 79. Two Jumpers for Serial Programming Connections
Table 13. J13 Header Pins
Pin
Label
Pin
Label
1
GND
2
GND
3
DATA
4
GND
5
CLK
6
GND
7
CSb_A
8
GND
9
CSb_B
10
GND
11
VCTRL0_A
12
GND
13
VCTRL0_B
14
GND
15
VCTRL1_A
16
GND
17
VCTRL1_B
18
GND
19
VCTRL2_A
20
GND
21
VCTRL2_B
22
GND
Each channel has its own latch pins, CSB_A and CSB_B (pin 7 of J13 and pin 9 of J13) so each channel
attenuator can be independently controlled. If you only have one latch signal, the ability to control each channel
attenuator achieved using headers J12 and J15. The latch signal must be applied to CSb_A (pin 7 of J13).
Table 14 lists the operation for the connections on these headers. Figure 54 shows the J12 and J15 headers.



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