參數(shù)資料
型號: TPS65930BZCHR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數(shù): 99/115頁
文件大?。?/td> 1232K
代理商: TPS65930BZCHR
HFCLKIN
SLEEP1
SLEEP2
CLKEN
Clock
generator
CLKREQ
Mainstate-machine
Optionalrequest
configurablebysoftware
onlyforlegacysupport
HFCLKOUT
Slicer
Timer
CLKEN2
SLICER_OK
Slicerbypass
037-044
SWCS037G
– MAY 2008 – REVISED APRIL 2011
11.2 Input Clock Specifications
The clock system accepts two input clock sources:
32-kHz crystal oscillator clock or sinusoidal/squared clock
HFCLKIN high-frequency input clock
11.2.1 Clock Source Requirements
Table 11-1 lists the input clock requirements.
Table 11-1. TPS65920/TPS65930 Input Clock Source Requirements
Pad
Clock Frequency
Stability
Duty Cycle
Crystal
±30 ppm
40%/60%
32KXIN
32.768 kHz
Square wave
45%/55%
32KXOUT
Sine wave
Square wave
±150 PPM
See (1)
HFCLKIN
19.2, 26, 38.4 MHz
Sine wave
(1)
HFCLK duty cycle and frequency is not altered by the internal circuit. The input clock accuracy must
match that of the system requirement; for example, OMAP device.
11.2.2 HFCLKIN
HFCLKIN can be a square- or a sine-wave input clock. If a square-wave input clock is provided, it is
recommended to switch the block to bypass mode to avoid loading the clock.
Figure 11-2 shows the HFCLKIN clock distribution.
Figure 11-2. HFCLKIN Clock Distribution
When a device needs a clock signal other than 32.768 kHz, it makes a clock request and activates the
84
Clock Specifications
Copyright
2008–2011, Texas Instruments Incorporated
focus.ti.com: TPS65930/TPS65920
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