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F0448 Datasheet(PDF) 27 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) 27 Page - Renesas Technology Corp

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F0448 Datasheet
X0008129 Rev.1.4
Feb 17, 2021
Page 27
Figure 69. DSA1 Default Condition
The F0448 includes a CLK inhibit feature designed to minimize sensitivity to CLK bus noise when the device is
not being programmed. When CSb is high (> VIH), the CLK input is disabled and serial data (DATA) is not
clocked into the shift register. It is recommended that CSb be pulled high (> VIH) when the device is not being
programmed.
Table 6. DSA1 Attenuation Word Truth Table (LSB = First In)
D7 (MSB)
Attenuation word
Attenuation
Setting (dB)
D6
D5
D4
D3
D2
D1
D0 (LSB)
x
LOW
LOW
LOW
LOW
LOW
x
x
0
x
LOW
LOW
LOW
LOW
HIGH
x
x
1
x
LOW
LOW
LOW
HIGH
LOW
x
x
2
x
LOW
LOW
HIGH
LOW
LOW
x
x
4
x
LOW
HIGH
LOW
LOW
LOW
x
x
8
x
HIGH
LOW
LOW
LOW
LOW
x
x
16
x
HIGH
LOW
HIGH
HIGH
LOW
x
x
22
x
HIGH
LOW
HIGH
HIGH
HIGH
x
x
23 (max)
x
HIGH
HIGH
LOW
LOW
LOW
x
x
23 (max)
x
HIGH
HIGH
LOW
LOW
HIGH
x
x
23 (max)
x
HIGH
HIGH
LOW
HIGH
LOW
x
x
23 (max)
x
HIGH
HIGH
LOW
HIGH
HIGH
x
x
23 (max)
x
HIGH
HIGH
HIGH
LOW
LOW
x
x
23 (max)
x
HIGH
HIGH
HIGH
LOW
HIGH
x
x
23 (max)
x
HIGH
HIGH
HIGH
HIGH
LOW
x
x
23 (max)
x
HIGH
HIGH
HIGH
HIGH
HIGH
x
x
23 (max)
Default Register Setting
x
x
x
1
1
1
1
1
LSB
MSB
D0
D1
D2
D3
D4
D5
D6
D7



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