rf2057 RF Micro Devices, rf2057 Datasheet - Page 15

• Manufacturer Part Number: rf2057
• Description: High Performance Wideband Rf Pll/vco With Integrated Rf Mixers For Repeaters
• Manufacturer: RF Micro Devices

Serial Interface
All on-chip registers in the RF2057 are programmed using a 3-wire serial bus which supports both write and read operations.
Synthesizer programming, device configuration and control are achieved through a mixture of hardware and software controls.
Certain functions and operations require the use of hardware controls via the ENBL, MODE, and RESETB pins in addition to
programming via the serial bus.
Serial Data Timing Characteristics
DS091109
Parameter
t1
t2
t3
t4
t5
t6
t7
t8
t9
RESETB
ENX
SCLK
SDATA
ENBL
Programming setup time
Programming hold time
ENBL setup time
Data setup time
ENX setup time
ENBL hold time
Description
Data hold time
ENX hold time
Reset delay
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Reset
chip
General Programming Information
t2
t6
t1
t3
X
t7
X
Initial programming of device
MCU
X
3-wire bus
Hardware
Controls
RESETB
Time
>5ns
>5ns
>5ns
>5ns
>5ns
>5ns
>5ns
>0ns
>0ns
SDATA
X
ENBL
MODE
SCLK
ENX
X
X
t4
t8
t5
RF2057
t9
Programming
X
updates
X
RF2057
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