参数资料
型号: TRF3761-EIRHARG4
厂商: TEXAS INSTRUMENTS INC
元件分类: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
封装: GREEN, PLASTIC, MO-220VJJD-2, QFN-40
文件页数: 29/60页
文件大小: 1736K
代理商: TRF3761-EIRHARG4
SERIAL INTERFACE PROGRAMMING REGISTERS DEFINITION
tsu1
th
t(CLK)
tsu2
tw
1” ClockPike
CLOCK
DATA
STROBE
DB0(LSB)
Addressbit1
DB1
Addressbit2
DB2
Addressbit3
DB29
Cmdbit30
DB30
Cmdbit31
DB31(MSB)
Cmdbit32
www.ti.com ............................................................................................................................................... SLWS181J – OCTOBER 2005 – REVISED AUGUST 2008
The TRF3761 features a 3-wire serial programming interface that controls an internal, 32-bit shift register. There
are a total of 3 signals that need to be applied: the CLOCK (pin 3), the serial DATA (pin 4) and the STROBE (pin
5). The DATA (DB0-DB31) is loaded LSB first and is read on the rising edge of the CLOCK. The STROBE is
asynchronous to the CLOCK and at its rising edge the data in the shift register gets loaded onto the selected
internal register. The first four bits (DB0-DB3) is the address to select the available internal registers.
A.
The first 4 bits, DB(3-0), of data are Address bits. The 28 remaining bits, DB(31-4), are part of the command. The
command is little endian or lower bits first.
Figure 83. Serial Programming Timing Diagram
Register Address
REST
Charge Pump Current
Output Mode
OUTBUF
PD
Reference Clock Divider (RDiv)
Select
EN_SEL
BUFOUT
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
Reference Clock Divider (RDiv)
Anti Backlash
PFD_P
TRIS_C
CP_TE
Full Cal
OL
P
ST
Req
DB16
DB17
DB18
DB19
DB20
DB21
DB22
DB23
DB24
DB25
DB26
DB27
DB28
DB29
DB30
DB31
Figure 84. Register 1
Copyright 2005–2008, Texas Instruments Incorporated
35
Product Folder Link(s): TRF3761
相关PDF资料
PDF描述
TRF3761-DIRHAT PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-HIRHARG4 PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-FIRHAT PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-BIRHAR PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-KIRHAT PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
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